Numerical Study on the Dynamical Behavior of Water Tanks with Floating Covering
| Autor: | Yu-Sheng Hung, 洪佑昇 |
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| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 Partitioned Tank Damper (PTD) is a rectangular reservoir equipped with a partition board in the middle and contains water, when the bottom of partition board opened, the fluid flow oscillates between two side of tanks. PTD equipped in a structural system will suppress the oscillation excited by earthquakes or wind efficiently. This thesis attempts to investigate the behaviors of a PTD by numerical analysis. This thesis utilizes PTD model test and numerical simulation to analyze the motion of fluid inside PTD. We set the PTD on the shaking table and use the servo motor to give it ramp displacement, and take pictures by Charge Coupled Device(CCD) camera, so we can utilize the image acquisition software to analyze the elevation and inclination of water surface. Furthermore, we can use the data to calculate the distribution of stream function, vortices, and pressure. In the numerical works, first we test the model. The result shows that Finite Analytic Method takes more time and more iterations than Finite Difference Method. Furthermore, choose the grid size and the bound of convergence properly will avoid the waste of time; choose the successive over-relaxation factor correctly will speedup the time of computer calculation. The numerical simulation of PTD shows strong vortices occur near water surface and vertical bound. Generally speaking, the distribution of vortices will not affect the distribution of stream function. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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