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Full-Text Articles in Mechanical Engineering
An Analysis Of The Dense Packing Of Disks : A Computer Simulated Approach, Jir-Yih Tsaur
An Analysis Of The Dense Packing Of Disks : A Computer Simulated Approach, Jir-Yih Tsaur
Theses
This thesis is concerned with the analysis of dense packing of hard disks. The Voronoi diagram and the geometric neighbours were first computed. The average number of geometric neighbours of a disk is six. It is thus more efficient to choose structural neighbours from among the geometric neighbours than from among all other disks.
Through the Monte Carlo simulation by Rosato et. al., disk configurations after pouring and subsequent shaking were provided for analysis. The mean number of geometric neighbours and the average coordination number were computed. The angular distribution of the structural neighbours was discussed. The packing fraction increases …
Investigation Of Forces In The Course Of The Water Jet--Work Piece Interaction, Hung-Yuan Li
Investigation Of Forces In The Course Of The Water Jet--Work Piece Interaction, Hung-Yuan Li
Theses
This study is concerned with the dynamic of the interaction between the water jet and the work-piece. The piezoelectric transducer was used to construct an experimental setup. The simultaneous use of the constructed setup and strain gage enables us to validate the experimental procedure. The forces in the impingment zone were measured at different operational conditions. Totally about 400 different combinations of these conditions were tested. It was found that the force is mainly determined by the diameter of the sapphire. The effects of the abrasive size , abrasive flow rate, the diameter of the carbide tube, and the stand-off …
A Feasible Direction Procedure For General Multiple Objective Optimization, Wen-Tsia Liu
A Feasible Direction Procedure For General Multiple Objective Optimization, Wen-Tsia Liu
Dissertations
The Feasible Direction Finding Problem (DFP) of Zoutendijk is adapted to create a general Mathematical Programming (MP) algorithm for treating optimization problems with multiple objective functions. Classically such problems are reduced to standard MP form by converting them to single objective function problems by the use of weighting functions. Unfortunately not all practical problems can be so reduced. Consider the problem of maximizing the strength of a structure. Typically there are several, or even many, failure modes. All active failure modes must be included in the optimal search in such a way that resistance to one active mode can not …