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Articles 1 - 30 of 96
Full-Text Articles in Engineering
Assessment Of Changes Of Extreme Wave Conditions At The German Baltic Sea Coast On The Basis Of Future Climate Change Scenarios, Norman Dreier, Christian Schlamkow, Peter Fröhle, Dörte Salecker, Zhenshan Xu
Assessment Of Changes Of Extreme Wave Conditions At The German Baltic Sea Coast On The Basis Of Future Climate Change Scenarios, Norman Dreier, Christian Schlamkow, Peter Fröhle, Dörte Salecker, Zhenshan Xu
Journal of Marine Science and Technology
Information on possible changes in extreme wave heights is needed to determine the future effectiveness and safety of coastal and flood protection structures. In this study, an assessment of possible changes in the extreme wave heights at selected locations along the German Baltic Sea coast has been carried out on the basis of numerical simulations of waves in the western Baltic Sea and regional climate model data for the past and the future (1961-2100). The future climate change signal of significant wave heights with a return period of 200 years mainly depends on: (i) the location, (ii) the climate change …
Seabed Scour Around A Breakwater A Case Study In Mailiao Harbor, I-Fu Lin, I-Fan Tseng, Chung-Pan Lee, Guan-Yu Chen
Seabed Scour Around A Breakwater A Case Study In Mailiao Harbor, I-Fu Lin, I-Fan Tseng, Chung-Pan Lee, Guan-Yu Chen
Journal of Marine Science and Technology
According to a field measurement in 2012, the bathymetry in the area of Mailiao Harbor, located in the middle of Taiwan's west coast, has scouring hole with a size distribution of approximately 500 x 100 m. The maximum scour depth is 26 m (from -22 m eroded to -48 m). Although scour has become a major threat to breakwaters and navigational safety, it can be predicted cost-effectively, reliably, and rapidly by applying the computational fluid dynamics (CFD) numerical simulation. In this study, numerical simulation of tidal current and typhoon waves was performed to investigate the causes of the scouring hole …
The Latest Progress In Wave Energy Conversions In China And The Analysis Of A Heaving Buoy Considering Pto Damping, Hong-Da Shi, Fei-Fei Cao, Na Qu
The Latest Progress In Wave Energy Conversions In China And The Analysis Of A Heaving Buoy Considering Pto Damping, Hong-Da Shi, Fei-Fei Cao, Na Qu
Journal of Marine Science and Technology
Wave energy conversions are being widely researched and developed in China; two key factors of significance with these devices are safety and efficiency. This paper provides information on the latest techniques of wave energy devices investigated in China, introduces their working principles, and describes performance briefly. To design a wave device, the conversion efficiency needs to be estimated. This paper describes a method for doing such analysis on a heaving buoy considering the power take-off, which is an important step for achieving wave-to-wire simulation.
Theoretical Analysis And Sph Simulation For The Wave Energy Captured By A Bottom-Hinged Owsc, Yu-Chi Chang, Da-Wei Chen, Yi-Chih Chow, Shiaw-Yih Tzang, Chen-Chou Lin, Jiahn-Horng Chen
Theoretical Analysis And Sph Simulation For The Wave Energy Captured By A Bottom-Hinged Owsc, Yu-Chi Chang, Da-Wei Chen, Yi-Chih Chow, Shiaw-Yih Tzang, Chen-Chou Lin, Jiahn-Horng Chen
Journal of Marine Science and Technology
This paper examines one type of wave energy converter, the Oscillating Wave Surge Converter (OWSC) with its bottom hinged on the sea bed. The simplest form of OWSC is a flapper connected with a power take-off (PTO). Theoretical analysis based on a 2D linear potential theory elucidates the mechanisms of the wave energy capture by a bottom-hinged OWSC in terms of impedances associated with the wave field, the flapper body, and the PTO. Criteria of impedance canceling and matching to maximize the energy capture factor can be deduced. Smoothed Particle Hydrodynamics (SPH) is established for simulating the same problem, and …
Current-Induced Seabed Scour Around A Pile-Supported Horizontal-Axis Tidal Stream Turbine, Jisheng Zhang, Peng Gao, Jinhai Zheng, Xiuguang Wu, Yuxuan Peng, Tiantian Zhang
Current-Induced Seabed Scour Around A Pile-Supported Horizontal-Axis Tidal Stream Turbine, Jisheng Zhang, Peng Gao, Jinhai Zheng, Xiuguang Wu, Yuxuan Peng, Tiantian Zhang
Journal of Marine Science and Technology
Tidal stream energy has attracted more and more attentions of researchers and engineers of coastal studies in recent years, as it is renewable, predictable and environmentally friendly. Although many efforts have been made for the application of tidal stream energy, the scouring process in the vicinity of a pile-supported tidal stream turbine remains unclear. This study develops a mathematical model, consisting of hydrodynamic module, General Moving Object (GMO) module and sediment scour module, to numerically investigate the fluidstructure interaction and its induced sediment scour process around such a combined structure. Only a steady current is considered in the model, and …
Yet Another 100yr Storm Surge Event: The Role Of Individual Storm Surges On Design Water Levels, Jürgen Jensen, Arne Arns, Thomas Wahl
Yet Another 100yr Storm Surge Event: The Role Of Individual Storm Surges On Design Water Levels, Jürgen Jensen, Arne Arns, Thomas Wahl
Journal of Marine Science and Technology
On December 6th 2013 the German coastline was hit by the extra tropical cyclone “Xaver”, which caused the highest water levels on record in some places. In the media, the resulting storm surge was quickly referred to as a “once in one hundred years” event or a “century storm surge”. Based on 12 tide gauges in the German Bight, we estimate return periods of the observed water levels during Xaver and find that they were much lower than 100 years. However, in some places Xaver caused increases in the 200-year return water level estimates, which are often used for the …
Statistical Analysis On The Long-Term Observations Of Typhoon Waves In The Taiwan Sea, Dong-Jiing Doong, Cheng-Han Tsai, Ying-Chih Chen, Jen-Ping Peng, Ching-Jer Huang
Statistical Analysis On The Long-Term Observations Of Typhoon Waves In The Taiwan Sea, Dong-Jiing Doong, Cheng-Han Tsai, Ying-Chih Chen, Jen-Ping Peng, Ching-Jer Huang
Journal of Marine Science and Technology
Seventeen data buoys were deployed in the Taiwan Sea since 1997. These buoys have made measurement for more than 100 typhoons. The purpose of this paper is to study the statistical characteristics of the observed typhoon waves. High resolution directional wave spectra are obtained by analyzing the buoy data. The Significant Typhoon Wave Height (SWTH) and the Duration of Large Waves (DLW) are proposed to indicate the sea severity of typhoons. The joint effect of the SWTH and the DLW is used to assess possible impact by the typhoon waves to the coast, using the damage curve calibrated from historical …
Variations Of Statistics For Random Waves Propagating Over A Bar, Yu-Xiang Ma, Xiao-Zhou Ma, Guo-Hai Dong
Variations Of Statistics For Random Waves Propagating Over A Bar, Yu-Xiang Ma, Xiao-Zhou Ma, Guo-Hai Dong
Journal of Marine Science and Technology
A series of physical experiments were conducted on the variations of statistics (skewness, kurtosis, groupiness) in random waves propagating over a submerged symmetrical bar. Random waves were generated using JONSWAP spectra while varying initial spectral width, wave height and peak frequency. It was found that the initial spectral width has a negligible effect on the variations of these statistical parameters. An abrupt change in wave groupiness is caused by wave breaking. Variations in the skewness and kurtosis mainly depend on the local water depth and wave height and period. Furthermore, the relationship between the skewness and kurtosis in the shoaling …
Experimental Study On The Erosion Stability Of Coarse Grain Materials Under Waves, Alexander Schendel, Nils Goseberg, Torsten Schlurmann
Experimental Study On The Erosion Stability Of Coarse Grain Materials Under Waves, Alexander Schendel, Nils Goseberg, Torsten Schlurmann
Journal of Marine Science and Technology
Large-scale hydraulic model tests were carried out by the Leibniz University of Hannover, Germany to investigate the performance of wide-graded grain materials (0.1-200 mm) as scour protection system tested under spectral wave loads. The model tests were conducted in the Large Wave Flume (GWK) of the Forschungszentrum Küste (FZK) assuming a length scale of 1:4. The experimental setup consisted of a single layer material bed protecting a monopile (D = 1 m) as often used as offshore supporting structure. In order to measure the structure-induced scour development around the monopile acoustic backscatter systems (ABS), single-beam echosounder, and a 3D laser …
Improved Boundary Values Of Ocean Wave Fields Using A Data Assimilation Scheme, Yang-Ming Fan, Heinz Günther, Dong-Jiing Doong, Chia Chuen Kao
Improved Boundary Values Of Ocean Wave Fields Using A Data Assimilation Scheme, Yang-Ming Fan, Heinz Günther, Dong-Jiing Doong, Chia Chuen Kao
Journal of Marine Science and Technology
The objective of this study was to assess the accuracy of numerical wave forecasts through data assimilation of boundary values. A sequential data assimilation scheme was adopted to utilise altimeter data. The performance of the system in terms of operational applications, specifically for typhoon waves, was investigated. Two typhoons that occurred in 2006 around Taiwan (Kaemi and Shanshan) were used as case studies. The proposed data assimilation increased the forecast accuracy of the boundary values in terms of the wave parameters, such as the wave heights and periods. The results showed that after the assimilation, the assimilation model was significantly …
Evaluation Of Tidal Stream Energy Around Radial Sand Ridge System In The Southern Yellow Sea, Jinhai Zheng, Jisheng Zhang, Jun Wang, Aifeng Tao
Evaluation Of Tidal Stream Energy Around Radial Sand Ridge System In The Southern Yellow Sea, Jinhai Zheng, Jisheng Zhang, Jun Wang, Aifeng Tao
Journal of Marine Science and Technology
Tidal stream energy as a new type of marine renewable energy attracts more and more attention of coastal engineers due to its advantages of great power density, long-term predictability and low environment impact. The radial sand ridge (RSR) system is located in the southern Yellow Sea off the Jiangsu coast, China, and it is characterized by a radial current field. The exploitation of tidal stream energy in the RSR system means great significance to the local industry and ecosystem of this region. In this study, a two-dimensional depthaveraged hydrodynamic model was established to predict one-year tidal hydrodynamics in the RSR …
Viscous Flow Fields Induced By A Breaking Solitary Wave Over A Shelf, Ching-Jer Huang, Yen-Tsen Lin, Chun-Yuan Lin
Viscous Flow Fields Induced By A Breaking Solitary Wave Over A Shelf, Ching-Jer Huang, Yen-Tsen Lin, Chun-Yuan Lin
Journal of Marine Science and Technology
This work investigates the viscous flow fields induced by a solitary wave passing over a shelf or a step. The proposed numerical model solves the unsteady two-dimensional Reynolds Averaged Navier-Stokes (RANS) equations and the turbulence equations. The finite-analytical scheme is used to discretize the differential equations involved in the RANS model. The particle level set method is adopted to capture the complex free surface evolution. Accuracy of the proposed model in simulating breaking solitary wave on a shelf is verified by comparing numerical wave profiles from the incident stage to the beginning of jet fall with the experimental data. Following …
Characteristics Of Boundary Layer Flow Induced By Solitary Wave Propagating Over Horizontal Bottom, Chang Lin, Shi-Min Yu, Po-Hung Yeh, Min-Hsuan Yu, Ching-Piao Tsai, Shih-Chun Hsieh, Ming-Jer Kao, Guang-Wei Tzeng, Rajkumar Raikar
Characteristics Of Boundary Layer Flow Induced By Solitary Wave Propagating Over Horizontal Bottom, Chang Lin, Shi-Min Yu, Po-Hung Yeh, Min-Hsuan Yu, Ching-Piao Tsai, Shih-Chun Hsieh, Ming-Jer Kao, Guang-Wei Tzeng, Rajkumar Raikar
Journal of Marine Science and Technology
Experimental results on the flow characteristics of bottom boundary layer induced by a solitary wave propagating over a horizontal bottom are presented. Particle-trajectory flow visualization technique and high-speed particle image velocimetry (HSPIV) were used to elucidate detailed velocity fields underneath solitary waves with the ratios of wave height to water depth from 0.130 to 0.386. The results show that the velocity profiles can be classified into two classes with respect to the passage of the solitary wave-crest at the measuring section: the pre-passing and post-passing phases. For the pre-passing phase, the velocity distributions can be deduced to a unique similarity …
Comparison Between Consistent Coupled-Mode System And Eigenfunction Matching Method For Solving Water Wave Scattering, Chia-Cheng Tsai, Wan-Rong Chou
Comparison Between Consistent Coupled-Mode System And Eigenfunction Matching Method For Solving Water Wave Scattering, Chia-Cheng Tsai, Wan-Rong Chou
Journal of Marine Science and Technology
Both the consistent coupled-mode system (CCMS) and the eigenfunction matching method (EMM) are well-known models for simulating the propagation of small-amplitude water waves over variable bathymetry. In this study, a thorough comparison is performed through numerical experiments. For the CCMS, a bottom-sloping mode is coupled in the mildslope equation with evanescent modes, then the CCMS are discretized by the finite-element method with high-order shape functions. For the EMM, the bottom profile is approximated in terms of successive flat shelves separated by abrupt steps, and then eigensolutions on the shelves are matched by the conservation of mass and momentum. To perform …
Discussions On The Occurrence Probabilities Of Observed Freak Waves, Aifeng Tao, Ji Peng, Jinhai Zheng, Yao Wang, Yuqing Wu
Discussions On The Occurrence Probabilities Of Observed Freak Waves, Aifeng Tao, Ji Peng, Jinhai Zheng, Yao Wang, Yuqing Wu
Journal of Marine Science and Technology
Field observational is the most direct and reliable research approach to investigate the freak waves, particularly for the occurrence probability. In order to present the latest research state, the results related to the observed freak waves from six sea areas are summarized and analyzed with comparisons. Three key conclusions are addressed. Firstly, both the occurrence probability and the strength of freak waves vary much for different sea areas. It is shown that there is still no answer to the big question of whether freak waves are rare events. Secondly, there is no single accepted, unified definition of freak waves. It …
Short Term Strategies For Solving A Variant Of Period Vehicle Routing Problem, Hsiu-Li Hsu, Ching-Wu Chu, Chao-Sheng Wu
Short Term Strategies For Solving A Variant Of Period Vehicle Routing Problem, Hsiu-Li Hsu, Ching-Wu Chu, Chao-Sheng Wu
Journal of Marine Science and Technology
A company faces a variant of Period Vehicle Routing Problem (PVRP). Because of seasonal fluctuation in demand, the company outsources delivery to avoid maintaining excess vehicles or facing vehicle shortages. Customer orders can be classified into two groups, those that must be satisfied within two days, and those that must be fulfilled within three days. Currently, the company satisfies most orders the next day based on experience rather than any formal system. The objective of the studied company is to satisfy all received orders and minimize monthly transportation costs. This study proposes two short term strategies for the studied company. …
The Design Of A Hull Form With The Minimum Total Resistance, Bao-Ji Zhang, Ai-Qin Miao
The Design Of A Hull Form With The Minimum Total Resistance, Bao-Ji Zhang, Ai-Qin Miao
Journal of Marine Science and Technology
In order to obtain a hull form which exhibits low resistance and highly-efficient energy-saving performance, the overall resistance should be calculated as the sum of wave-making and viscous resistance, in which the total resistance corresponds to the objective function whereas the hull geometry parameters correspond to design variables. Apart from considering the limited conditions due to appropriate displacement, we further ponder over the boundary-layer viscous separation caused by additional constraints. We then proceed to apply the Nonlinear Programming Method (NLP) to determine the hull form with the minimum total resistance. This paper aims to optimize the streamlined design of the …
Flow Characteristics Of Spilling And Plunging Breakers In The Surf Zone, Ting-Chieh Lin, Han-Lun Wu, Shih-Ming Lo, Shih-Chun Hsiao, Hwung-Hweng Hwung
Flow Characteristics Of Spilling And Plunging Breakers In The Surf Zone, Ting-Chieh Lin, Han-Lun Wu, Shih-Ming Lo, Shih-Chun Hsiao, Hwung-Hweng Hwung
Journal of Marine Science and Technology
Fundamental flow characteristics in the surf zone of spilling (SP) and plunging (PL) breakers are compared using a well-validated numerical model named COBRAS. The main objective is to investigate how beach slope affects flow characteristics (streamline topography, vorticity evolution processes, TKE dynamics and reverse flow) in the surf zone of plunging (PL) and spilling (SP) breakers. The major results are of four categories: (1) the streamline topography of PL waves is mostly similar to that of SP. For both types of breaker, a convergent stagnation point (CSP) always appears in the offshore direction after the generation of a divergent stagnation …
Time/Depth Dependent Diffusion-Covection Model Of Chloride With Transportation In Concrete Structures With Chloride-Binding Isotherms, Wen-Hu Tsao, Ming-Te Liang
Time/Depth Dependent Diffusion-Covection Model Of Chloride With Transportation In Concrete Structures With Chloride-Binding Isotherms, Wen-Hu Tsao, Ming-Te Liang
Journal of Marine Science and Technology
Ion transport through a hydrated cement system often becomes a principal factor to degrade concrete in a chlorideladen environments. Based on the transport mechanism of chloride ion, an analytical solution of mathematical model for predicting chloride penetration into concrete structures was herein derived. The model consists of both the diffusion of chloride due to concentration gradient and the convection of chloride due to moisture transport. The model also depends on temperature, age, relative humidity, and chloride binding. Based on both the diffusion coefficient and the mean velocity with time/depth dependence, an analytical solution of the mathematical model developed by previous …
Effects Of The Shear Gaps On The Breakage Behavior Of Silty Sand Particle, Jing-Wen Chen, Bo-Rung Lin, Shun-Chieh Hsieh, Wei F. Lee
Effects Of The Shear Gaps On The Breakage Behavior Of Silty Sand Particle, Jing-Wen Chen, Bo-Rung Lin, Shun-Chieh Hsieh, Wei F. Lee
Journal of Marine Science and Technology
To determine the breakage behavior of soil particles on a sliding surface, which is subjected to high overburden stress, modified direct shear tests were conducted on silty sand collected from Kaohsiung City, Taiwan. The sliding surfaces of the soil was simulated using different shear gaps of the shear box in the tests. The behavior of the particle breakage and strength properties of the sand were investigated. The results indicated that finer soil particles exhibited a lower breakage potential and breakage amount of sand particles, whereas a higher void ratio tended to lead to a higher breakage potential and breakage amount. …
Quantification Of Statistical Uncertainties In Performing The Peak Over Threshold Method, Yi Zhang, Yingyi Cao, Jian Dai
Quantification Of Statistical Uncertainties In Performing The Peak Over Threshold Method, Yi Zhang, Yingyi Cao, Jian Dai
Journal of Marine Science and Technology
Peak over threshold (POT) method is frequently used in the modeling of extreme values in offshore engineering. In this paper, the POT method is examined in terms of epistemic uncertainties in practical usage. Real observed ocean data with specific considerations to extreme events are analyzed. In particular, the procedures including the use of de-clustering and threshold in POT method are addressed. A key element in the application of probability and statistical theories is the estimation of model parameters. The performance of these estimation methods is tested in the context of epistemic uncertainty. This is done through a numerical simulation study …
Analytical Model Of Ultrasonic Pulse Velocity Of Waste Lcd Glass Concrete, Chien-Chih Wang, Her-Yung Wang, Shyh-Haur Chen, Chi Huang
Analytical Model Of Ultrasonic Pulse Velocity Of Waste Lcd Glass Concrete, Chien-Chih Wang, Her-Yung Wang, Shyh-Haur Chen, Chi Huang
Journal of Marine Science and Technology
The purpose of this study is to establish a prediction model for the ultrasonic pulse velocity (UPV) of waste LCD glass concrete and then analyze the results obtained from a series of laboratory tests. The power function is used to perform the nonlinear-multivariate regression analysis of the UPV prediction model, with parameters such as water-binder ratio (w/b), curing age (t) and waste glass content (G). According to the relative regression analysis, the UPV prediction model is developed. The calculated results are in accord with the laboratory-measured data, which are the concrete UPV of various mix proportions. The regression analysis results …
Analysis Of The Dynamics Of A Floating Body With Thin Skirts By Using The Dual Boundary Element Method, Wen-Kai Weng, Ruey-Syan Shih, Duc-Tru Tran
Analysis Of The Dynamics Of A Floating Body With Thin Skirts By Using The Dual Boundary Element Method, Wen-Kai Weng, Ruey-Syan Shih, Duc-Tru Tran
Journal of Marine Science and Technology
In this study, a numerical simulation of the dynamic behavior of a novel floating structure with rigid skirts was conducted using the dual boundary element method. The thickness of the skirts mounted beneath the structure was negligible. A theoretical analysis was derived from linear wave theory, and a nonlinear drag term was added in the motion equation of the floating structure for improving the solution. This study investigated the effects of double vertical skirts on a free floating structure and verified the validity of the analysis by comparing the result with those of Gesraha (2006). The results showed that adding …
Discussion On The Maximum Storm Radius Equations When Calculating Typhoon Waves, Chun-Ming Chang, Hui-Ming Fang, Yung-Wei Chen, Shih-Hsuan Chuang
Discussion On The Maximum Storm Radius Equations When Calculating Typhoon Waves, Chun-Ming Chang, Hui-Ming Fang, Yung-Wei Chen, Shih-Hsuan Chuang
Journal of Marine Science and Technology
In this paper, we conducted a series of numerical experiments to find the most suitable maximum wind speed radii for the parameterized typhoon model. Different maximum wind speed radius equations were used to generate different wind fields, which were then input into the MIKE21 Spectral Wave (SW) model. The wave height results from the MIKE21 SW model were compared with the measured results, and rootmean-square error (RMSE) analysis was conducted to find a good maximum wind speed radius equation for use as the basis for wind field generation in the future. The RMSEs were then scored according to this order. …
Numerical Crashworthiness Analysis Of An Offshore Wind Turbine Jacket Impacted By A Ship, Hervé Le Sourne, Andres Barrera, Jose Babu Maliakel
Numerical Crashworthiness Analysis Of An Offshore Wind Turbine Jacket Impacted By A Ship, Hervé Le Sourne, Andres Barrera, Jose Babu Maliakel
Journal of Marine Science and Technology
The objective of the present work is to understand the crushing behavior of a predefined wind turbine jacket when it is impacted by a ship. To investigate the resulting deformation modes and the repartition of dissipated energy, nonlinear finite element analyses are performed to simulate both rigid and deformable ships colliding the jacket at different velocities. In a first part, a sensitivity analysis to the jacket impacted area is carried out to find the most damaging situation. Then, the influences of gravity loads, wind force, and soil stiffness are studied, considering that the striking ship is rigid. In a second …
Rainfall-Induced Slope Landslide Pontential And Landslide Distribution Characteristics Assessment, Yung-Sheng Chue, Jing-Wan Chen, Yie-Ruey Chen
Rainfall-Induced Slope Landslide Pontential And Landslide Distribution Characteristics Assessment, Yung-Sheng Chue, Jing-Wan Chen, Yie-Ruey Chen
Journal of Marine Science and Technology
According to observations over the few years before and after typhoon and extreme rainfall events in the Laonong catchment of Kaohsiung, Southern Taiwan, this study combined a genetic adaptive neural network architecture, image texture analysis, and a geographic information system (GIS) in satellite image interpretation and land use change analysis to obtain disaster records and surface information. A multivariate hazards evaluation method was applied to quantitatively analyze the weights of various natural environmental and slope development hazard factors. Furthermore, this study established a slope landslide potential assessment model and depicted a slope landslide potential diagram by using the GIS platform. …
Applying The Rasch Model To Construct The Shipping Industry Employability Indicators, Tzeu-Chen Han, Ti-Huei Li
Applying The Rasch Model To Construct The Shipping Industry Employability Indicators, Tzeu-Chen Han, Ti-Huei Li
Journal of Marine Science and Technology
In recent years, with the increase of the unemployment rate, employability has become a popular issue for different industries, as it can enhance the employment rate for industries and project industrial growth. This study examines shipping-related industries using the Rasch model, to construct scientific evaluation items in relation to the professional techniques and skills of the shipping-related industries. It further validates whether the generalized employability in the shipping-related industries is needed. Research findings are reorganized as employability indicators of the shipping-related industries. The findings are expected to serve as references for the shipping industry to evaluate new employees and for …
Analysis Of Grounding Accidents Caused By Human Error, Özkan Uğurlu, Umut Yıldırım, Ersan Başar
Analysis Of Grounding Accidents Caused By Human Error, Özkan Uğurlu, Umut Yıldırım, Ersan Başar
Journal of Marine Science and Technology
Despite modern bridge equipment, new technologies, and improved safety measures, maritime accidents still occur, and an analysis of their causes is essential in preventing future accidents. Ship groundings are one of the more frequent types of accidents encountered, and this study examines the maritime accident reports issued for grounded ships between 1993 and 2011. These were sourced using the International Maritime Organization's Global Integrated Shipping Information System and the reports published by the countries and relevant institutions that investigated the accidents. The grounding accidents are analysed using the Analytic Hierarchy Process, and the objective of this study is to act …
A Numerical Study Of Liquid Tank And Structure Interaction, Bang-Fuh Chen, Shih-Ming Huang
A Numerical Study Of Liquid Tank And Structure Interaction, Bang-Fuh Chen, Shih-Ming Huang
Journal of Marine Science and Technology
A time-independent finite difference method was used to solve for a fully nonlinear sloshing fluid in a tank mounted on a structure. The interaction between the sloshing fluid and the dynamic response of the structure was investigated. The dynamic response of the structure was calculated using the fourth-order Runge-Kutta method, and the numerical model was extensively validated through comprehensive data comparisons. The tank was tuned to an appropriate depth to length ratio and was used as a tuned liquid damper. Several cases, including large and small structures, were studied. In addition, a vibration control analysis of the tank-structure system in …
Criteria Of Sea Area Royalty For Port Transportation: Research And Application, Xiao-Hui Wang, Bo Peng
Criteria Of Sea Area Royalty For Port Transportation: Research And Application, Xiao-Hui Wang, Bo Peng
Journal of Marine Science and Technology
Criteria of sea area royalty for port transportation are important technical bases to operate marketization of sea. According to factors such as the geographic position of the sea, peripheral social-economic development status and environmental conditions, this paper establishes an evaluation index system of royalty criteria. It builds a calculation model of criteria of sea area royalty for port transportation using an interpolation method, collects relevant index data of 19 coastal areas (cities or districts) in Zhejiang Province and calculates the criteria for sea area use royalty of the Dinghai District. The results indicate that criteria of sea area royalty are …