Analysis of the Effect of the Ship Vibration on the On-board Equipment

摘要

The equipment mounted on the shipboard is exposed to various vibration environments such as wind, ship engines, propeller propulsion and operation vibration of the onboard equipment. If the vibration energy is constantly transmitted to the onboard device, it is caused that the performance degradation and mechanical damage of the onboard device. Therefore, the vibration stability analysis through the resonance frequency avoiding design and the selection of the appropriate shock absorber has to be performed in the development stage. Specifically, it means that the excitation frequency generated when the on-board equipment is operated should be separated from the resonance frequency of the on-board equipment disposed in the vicinity, and the excitation force reduced through the isolator attached to the excitation source should be analyzed by a numerical analysis and an experimental method. Therefore, in this study, it is analyzed the natural frequency of the excitation source and the transmission rate through the shock absorber by numerical analysis to predict at the design stage how effectively the vibration energy transmitted to the structure of the ship is reduced. When the excitation force of the excitation source is constantly transmitted to the structure of the ship, the structural strength and fatigue are induced in the structure of the ship which is consisted of aluminum material. Therefore, the prototype is manufactured to be verified by experiments whether the actual generated displacement of the mounting surface meets the design parameter of lmm or less.