Analysis of Transfer Mobility of Pipe Support Structure to the Effect of Vibration and Noise Improvement
| Autor: | Guan-Yu Lai, 賴冠宇 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 The noise generated by the operation of oil offloading of a chemical carrier often causes a living environmental impact to the adjacent habitation area. Thus, such kind of noise becomes an urgent problem to be overcome. In which, the noise sources encompass three part the pump noise, the radiated noise from the pipe wall vibrations the radiated noise from the hull shell vibration transmitted from the pipe supports. This paper is mainly discussing the influence of pipe support structure to the radiated noise level from the transmitted vibration of the ship hull. By appropriate change of the pipe support stiffness, the pipe folw noise can be reduced accordingly. To this purpose, the measurement of pipe supports vibration by experimental modal analysis when I haven't improved the pipe supports structure. Then used the finite element analysis to simulation the pipe supports structure system of the mobility, and compared the simulation with the measurement by precision. I compared it again by boundary element analysis software to achieve piping supports structure sound radiation. Next used the finite element analysis software and mobility theoretical analysis of the vibration reduction effects of structure of various stiffness. Finally, design optimization by using a minimum of material and weight to strengthen the support structure. Through the simulation results, used U-shaped profile structure and rectangular tube profile structure instead of the original L-shaped profile structure can enhanced stiffness better. The mobility of L-shaped profile structure is 60.7 dB. The mobility of U-shaped profile structure and rectangular tube profile structure are 52.4 dB and 52.8 dB. Prove that the improved structures can effectively enhance stiffness and reduce vibration. The L-shaped profile structure which didn’t improved structure will cause the vibration bigger. Keywords: piping, radiation noise, support structure stiffness, vibration reduction, noise reduction |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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