浮筏结构动态特性灵敏度分析及动力学修改

Sensitivity Analysis of Dynamic Characteristics and Structure Modification of Floating Raft System

分析了浮筏结构固有特性对设计参数的灵敏度,以某船舶辅机和浮筏隔振结构为例,计算并分析了固有频率对筏体单元厚度和材料密度即刚度与质量的灵敏度,确定了敏感单元的部位。在此基础上,进行了动力学修改,改善了隔振效果。

The sensitivity of the natural characteristics of the floating raft system to the structural parameters is described. The sensitivities of modal frequencies to the physical parameters of the floating raft system, such as the mass and the stiffness were given. With the floating raft system as an example, the sensitivities of natural frequencies to the thickness of the elements and the density of the material were calculated and analyzed. The sensitive elements were then revealed. The dynamic modification was carried out and the effect of vibration isolation was improved.