海洋平台空调机组振动对生活楼结构动力影响分析

Structural Dynamic Analysis of Offshore Platform's Living Quarter Caused by Air-Condition Vibration

为研究空调机组振动对生活楼结构的动力影响,利用ANSYS建立海上平台生活楼模型,通过谐响应分析和动力分析,对生活楼的振动加速度和振动位移开展敏感性研究。结果表明:生活楼发生共振频率较高;结构振动加速度对激励频率较敏感,结构振动位移对激励幅值较敏感;空调机组位于生活楼顶层,导致顶层房间受空调机组振动影响较大。增加空调机组底座缓冲材料和生活楼顶层甲板横梁刚度等能够有效抑制生活楼局部振动。

In order to study the influence of air-conditioning unit vibration on the s truc-ture of living-quarter, the finite element model of the pla tform＇s living quarter is established using ANSYS. According to the results of harmonic response analysis and dynamic analysis re sul ts , the sensibility of vibration acceleration and displacement are studied. The conclusions ar e： the resonance frequency of living quarter is very h ig h; the vibration acceleration is sensi-tive to driving frequency, and the vibration displacement is sensitive to driving ampl itude; the air-condition unit located on the roof of living quarter results in the larger vrbration on the top floor rooms. Adding cushion materials between the skid-beam of air-condition and roof, and improving the beam stiffness of the roof deck can restrain the local vibration of living quarter effectively.