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Articles 871 - 900 of 5926

Full-Text Articles in Mechanical Engineering

Sensitive Analysis Of The Static Response Of Compliant Vertical Access Risers, Fuheng Li, Haiyan Guo, Xiaomin Li, Honglu Gu May 2022

Sensitive Analysis Of The Static Response Of Compliant Vertical Access Risers, Fuheng Li, Haiyan Guo, Xiaomin Li, Honglu Gu

Journal of Marine Science and Technology–Taiwan

Compliant vertical access risers (CVARs) are considered as efficient and robust alternative options to achieve cost efficiency and safety. Design uncertainties emerge owing to the limited understanding of the effects of various parameters related to the structural properties and marine loads. In this paper, a reasonable three-dimensional (3D) numerical model of CVAR with internal flow is presented based on the slender rod theory. Accordingly, the finite element method combined with a Newton-Raphson scheme is employed to discretize and solve the equations. A sensitivity analysis is performed to investigate the influence of the structural and external load parameters on the static …


Influence Of Boundary Conditions And Internal Fluid Types On Dynamic Characteristics Of A Deepwater Riser, Lei Guo, Zong-Ming Zhu, Zhong-Jian Pan, Zhi-Ming Guo May 2022

Influence Of Boundary Conditions And Internal Fluid Types On Dynamic Characteristics Of A Deepwater Riser, Lei Guo, Zong-Ming Zhu, Zhong-Jian Pan, Zhi-Ming Guo

Journal of Marine Science and Technology–Taiwan

Deepwater Steel Catenary Riser (DSCR) is the key structure of oil and gas production system in the ocean. To design an optimized DSCR system, the dynamic characteristics of the DSCR are analyzed by setting some different boundary condi-tions and internal fluid types. The main vibration mode of the DSCR is found orthogonal to both mass and stiffness according to the normalization condition of the main mode, and then the regular mode function and the jth order principal stiffness Kpj are obtained. Under different initial conditions, the transverse responses of DSCR represented by regular coordinates under arbitrary excitation are obtained. Then, …


Variance Of Td-Mosaic Dual-Vortex Interactions Between In-Fa And Cempaka (2021) In The North Pacific, Tsorng-Lin Chia, Guang-Yang Pan, Ji-Chyun Liu May 2022

Variance Of Td-Mosaic Dual-Vortex Interactions Between In-Fa And Cempaka (2021) In The North Pacific, Tsorng-Lin Chia, Guang-Yang Pan, Ji-Chyun Liu

Journal of Marine Science and Technology–Taiwan

A study of the different types of dual-vortex interactions or “Fujiwara effects” between two storms is crucial for considerably improving weather forecasts. This study combined remote sensing images, empirical formulas based on the possibility of storm interaction (Liou–Liu formula), and vector addition techniques to accurately analyze In-Fa and Cempaka typhoons and the surrounding weather patterns during the 2021 typhoon season in the North Pacific. Although the distance separating the typhoons In-Fa and Cempaka was 1,800–2,040 km, the influence of middle air flow and a tropical depression (TD) caused a "vector superposition TD-mosaic double-vortex" interaction between the two typhoons. Therefore, this …


Optimal Deployment Of Flood Emergency Response Materials Under Stochastic Demands, Shangyao Yan, Jenn-Rong Lin, Chia-Fu Ku May 2022

Optimal Deployment Of Flood Emergency Response Materials Under Stochastic Demands, Shangyao Yan, Jenn-Rong Lin, Chia-Fu Ku

Journal of Marine Science and Technology–Taiwan

This study aims to develop a planning model for the deployment of flood emergency response materials under stochastic demands. For ease of modeling, a deterministic demand model is first proposed, from which the stochastic model is further extended. These models are used to determine the allocation of materials the transport truck routes and distribution of the stockpiled materials to emergency sites. The models are formulated as multiple integer network flow problems with special side constraints which are characterized as NP-hard in terms of optimization. To solve the complicated stochastic model efficiently, we also develop a solution algorithm based on a …


Optimal Design Of Bacterial Carpets For Fluid Pumping, Minghao W. Rostami, Weifan Liu, Amy Buchmann, Eva Strawbridge, Longhua Zhao May 2022

Optimal Design Of Bacterial Carpets For Fluid Pumping, Minghao W. Rostami, Weifan Liu, Amy Buchmann, Eva Strawbridge, Longhua Zhao

Biology and Medicine Through Mathematics Conference

No abstract provided.


Ecological Risk Assessment For Coal Combustion Residuals And Herrington Lake Adjacent To The Kentucky Utilities E.W. Brown Generating Station, Mary Sorensen, Alex Smith, Mark Nielsen May 2022

Ecological Risk Assessment For Coal Combustion Residuals And Herrington Lake Adjacent To The Kentucky Utilities E.W. Brown Generating Station, Mary Sorensen, Alex Smith, Mark Nielsen

World of Coal Ash Proceedings

No abstract provided.


Epri Research On Groundwater-Surface Water Interactions Near Coal Combustion Product Sites, Bruce Hensel, Jeff Thomas, Tim Towey, Anthony Aufdenkampe May 2022

Epri Research On Groundwater-Surface Water Interactions Near Coal Combustion Product Sites, Bruce Hensel, Jeff Thomas, Tim Towey, Anthony Aufdenkampe

World of Coal Ash Proceedings

No abstract provided.


Cqa - A Common Sense Approach At Becoming The Mvp On Your Next Project, James Price, Michael Fisher, John Metcalf May 2022

Cqa - A Common Sense Approach At Becoming The Mvp On Your Next Project, James Price, Michael Fisher, John Metcalf

World of Coal Ash Proceedings

No abstract provided.


Challenges & Pragmatic Solutions For The Design And Construction Of A 300-Acre Ccr Landfill Located In The Southwestern Us - A Case Study, Andy Lucas, Jason Pokorny May 2022

Challenges & Pragmatic Solutions For The Design And Construction Of A 300-Acre Ccr Landfill Located In The Southwestern Us - A Case Study, Andy Lucas, Jason Pokorny

World of Coal Ash Proceedings

No abstract provided.


State Of The Practice For Compaction Quality Of Dry Stack Ccr Storage Facilities, Bruce Cunningham, Pavana Vennapusa, David J. White, Robert Eric Hageman May 2022

State Of The Practice For Compaction Quality Of Dry Stack Ccr Storage Facilities, Bruce Cunningham, Pavana Vennapusa, David J. White, Robert Eric Hageman

World of Coal Ash Proceedings

No abstract provided.


Groundwater Compliance & Strategy Insights For Ccr Rule Stakeholders, Sheryl Smith, Mark Johnson May 2022

Groundwater Compliance & Strategy Insights For Ccr Rule Stakeholders, Sheryl Smith, Mark Johnson

World of Coal Ash Proceedings

No abstract provided.


Hybrid Closure Approach: Constructing Bidding Lessons Learned, Brian Harthun, P.E. May 2022

Hybrid Closure Approach: Constructing Bidding Lessons Learned, Brian Harthun, P.E.

World of Coal Ash Proceedings

No abstract provided.


Ccr Landfill Construction & Operation Under Subtitle D, Thomas R. Gredell May 2022

Ccr Landfill Construction & Operation Under Subtitle D, Thomas R. Gredell

World of Coal Ash Proceedings

No abstract provided.


Hybrid Closure Approach: Design Investigation Review, Brian Sperrazza, P.E., P.G. May 2022

Hybrid Closure Approach: Design Investigation Review, Brian Sperrazza, P.E., P.G.

World of Coal Ash Proceedings

No abstract provided.


Geochemical Explanations For Strong Natural Attenuation Of Molybdenum, Selenium, And Lithium In A Groundwater Plume, Jacob Chu, J. P. Brandenburg May 2022

Geochemical Explanations For Strong Natural Attenuation Of Molybdenum, Selenium, And Lithium In A Groundwater Plume, Jacob Chu, J. P. Brandenburg

World of Coal Ash Proceedings

No abstract provided.


Construction Risk Management Considerations For Ccr Surface Impoundment Closures, John P. Seymour, Chris Robb May 2022

Construction Risk Management Considerations For Ccr Surface Impoundment Closures, John P. Seymour, Chris Robb

World of Coal Ash Proceedings

No abstract provided.


Monitoring Well Integrity And Performance Part Ii - Seeing The Benefits, Bryan R. Hansen, Jacob G. Gruzalski, Thomas S. Dicken, Rock J. Vitale May 2022

Monitoring Well Integrity And Performance Part Ii - Seeing The Benefits, Bryan R. Hansen, Jacob G. Gruzalski, Thomas S. Dicken, Rock J. Vitale

World of Coal Ash Proceedings

No abstract provided.


Use Of A Net Environmental Benefit Analysis To Evaluate Remedial Options To Address Coal Ash – Case Studies, Joseph Nicolette, Michael Rockel May 2022

Use Of A Net Environmental Benefit Analysis To Evaluate Remedial Options To Address Coal Ash – Case Studies, Joseph Nicolette, Michael Rockel

World of Coal Ash Proceedings

No abstract provided.


Ccr Beneficial Use Data Capture And Reporting, Joe Ploetz, Kevin Foody May 2022

Ccr Beneficial Use Data Capture And Reporting, Joe Ploetz, Kevin Foody

World of Coal Ash Proceedings

No abstract provided.


Use Of Tritium-Helium Isotopes For Vertical Delineation Of Ccr Constituents In Groundwater, Lane Dorman, Lauren Fitzgerald, Ryan Fimmen, Robert Trey Singleton May 2022

Use Of Tritium-Helium Isotopes For Vertical Delineation Of Ccr Constituents In Groundwater, Lane Dorman, Lauren Fitzgerald, Ryan Fimmen, Robert Trey Singleton

World of Coal Ash Proceedings

No abstract provided.


Building Defensibility For Mna Remedy Selection, Michael Healey, Jeff Roberts, Sarah Cronk, Andrzej Przepiora May 2022

Building Defensibility For Mna Remedy Selection, Michael Healey, Jeff Roberts, Sarah Cronk, Andrzej Przepiora

World of Coal Ash Proceedings

No abstract provided.


Wind Performance Evaluation Of Engineered Turf Final Cover And Exposed Geomembrane, Ming Zhu, Bryan Scholl May 2022

Wind Performance Evaluation Of Engineered Turf Final Cover And Exposed Geomembrane, Ming Zhu, Bryan Scholl

World of Coal Ash Proceedings

No abstract provided.


Attenuation And Source Zone Depletion Of Boron From Coal Combustion Residuals In Groundwater, J.P. Brandenburg, Dave Hagen May 2022

Attenuation And Source Zone Depletion Of Boron From Coal Combustion Residuals In Groundwater, J.P. Brandenburg, Dave Hagen

World of Coal Ash Proceedings

No abstract provided.


Whole Effluent Toxicity (Wet) Assessments And Experimental Considerations For Evaluating Coagulation Agents And Polymers For Wastewater Treatment Of Coal Combustion Products, Konrad J. Kulacki, William L. Goodfellow Jr., Margaret L. Fleming, Alexandra N. Steele May 2022

Whole Effluent Toxicity (Wet) Assessments And Experimental Considerations For Evaluating Coagulation Agents And Polymers For Wastewater Treatment Of Coal Combustion Products, Konrad J. Kulacki, William L. Goodfellow Jr., Margaret L. Fleming, Alexandra N. Steele

World of Coal Ash Proceedings

No abstract provided.


Chemical Compatibility And Hydraulic Performance Of Lightweight Polymer Modified Gcls, Michael S. Donovan, Barbara Gebka, Dennis Wind, Reza Gorakhki May 2022

Chemical Compatibility And Hydraulic Performance Of Lightweight Polymer Modified Gcls, Michael S. Donovan, Barbara Gebka, Dennis Wind, Reza Gorakhki

World of Coal Ash Proceedings

No abstract provided.


The Intersection Of The Ccr Rule, Superfund, And Irrigation On The Great Plains, Shane D. Mcdonald, Jillian Troyer, Robert Kleinmann, Marty Stange May 2022

The Intersection Of The Ccr Rule, Superfund, And Irrigation On The Great Plains, Shane D. Mcdonald, Jillian Troyer, Robert Kleinmann, Marty Stange

World of Coal Ash Proceedings

No abstract provided.


Using Shear Wave Velocity Measurements To Identify Cemented Ccr, Andrew Fuggle, Longde Jin, Haley Roberts May 2022

Using Shear Wave Velocity Measurements To Identify Cemented Ccr, Andrew Fuggle, Longde Jin, Haley Roberts

World of Coal Ash Proceedings

No abstract provided.


Hybrid Closure Approach: Project Summary, Glenn Leo, P.E. May 2022

Hybrid Closure Approach: Project Summary, Glenn Leo, P.E.

World of Coal Ash Proceedings

No abstract provided.


Future Management & Treatment Of Non-Ccr Waste Streams At Midwest Coal-Fired Power Plants With Case Studies, Jason Pokorny, Lee W. Saunders May 2022

Future Management & Treatment Of Non-Ccr Waste Streams At Midwest Coal-Fired Power Plants With Case Studies, Jason Pokorny, Lee W. Saunders

World of Coal Ash Proceedings

No abstract provided.


Real-Time Water Quality Monitoring For Successful Ccr Unit Closure, Joseph Kamalesh, John Watrous, Richard Shook May 2022

Real-Time Water Quality Monitoring For Successful Ccr Unit Closure, Joseph Kamalesh, John Watrous, Richard Shook

World of Coal Ash Proceedings

No abstract provided.