上层建筑局部振动分析与优化设计

Local Vibration Analysis and Optimization Design of Superstructure

文章采用三维有限元法对上层建筑甲板板架局部振动模态进行分析预报。针对上层建筑局部结构固有频率不满足频率储备的要求,提出了三种优化方案。通过有限法计算三种方案下的结构固有频率,从多方面考虑最终确定方案三为最优方案。采用简化理论计算法计算该方案的固有频率并与有限元计算结果进行了比较,为上层建筑局部振动的简化结构设计提供了思路和方法。

In this paper,the three-dimensional finite element method is used to analyze and predict the local vibration mode of the superstructure deck frame.In view of the fact that the natural frequency of local structure of superstructure does not meet the requirement of frequency reserve,three optimization schemes are proposed.The natural frequencies of the structure under three schemes are calculated by the finite method,and the final scheme is determined.The natural frequency of the scheme is calculated by the simplified theoretical calculation method and is compared with the results of the finite element calculation,which provides reference for the simplified structural design of the local vibration of the superstructure.