Simulation modeling and experimental analysis on vibration of offshore platform engine cabin
In order to meet the need for improving vibration and noise isolation performances,a FEM model was estab-lished for the complex system composed of platform cabin,machines and isolators to analyze the vibration transmission from the machine to the isolators and to the foundation of the whole cabin structure.Discussions were presented for influences of five different models with different boundary conditions and isolator stiffnesses.Excitation experiments for the platform en-gine cabin with two different working conditions,ie.,40％power and sailing,were performed.The vibration responses from the excitation points to the vibration points were obtained.The finite element calculation results were compared with the ex-perimental results.The two results were relatively close with each other which indicated that for the low frequency band,it's improper to simulate the dynamic characteristics with one cabin model.The FEM model of the engine cabin can meet the need for engineering applications and can also provide some useful reference for isolation optimization design of the off-shore platform.
vibration of engine cabinsimulation modelingvibration transmissionexperimental comparison
NETL
NSTL
万方数据
