摘要
在回顾模态参数识别和动特性灵敏度分析基础上,给出了结构动态修改的模态分析、有限元综合法,探讨了受迫振动的计算机仿真计算方法。通过工程实例,分析了结构的物理参数对模态频率、振动位移的灵敏度,取得了动态薄弱环节及优化方向。通过系列动态修改及响应仿真分析,获得了共振频率及振动响应随闸门物理参数的变化关系。
Based on mode analysis and parameter sensitivities of dynamic characterisics of structure, a synthetic method of mode analysis and finite element for conducting dynamic modification of structure is provided in this paper, and an analogue computing method for forced vibration is also discussed. With an engineering example, the sensitivities of physical parameters of structure to mode frequencies and displacements are analyzed, consequently, dynamic weak position and optimization orinetation of the structure under discussion are found. After a series of dynamic modification and response analogue analysis, the variation of resonant frepuencies and vibration response with physical parameters of structure is obtained.
