基于模态分析的水下航行器尾舵结构优化

Structural Optimization of Underwater Vehicle Based on Modal Analysis

通过采用计算模态分析与试验模态分析方法,得出原始尾舵的模态频率及振型,对比试验结果与有限元分析结果,验证了原始尾舵有限元模型的准确性,并分析其薄弱环节.基于此提出两种优化尾舵方案,分别进行计算模态分析,得到两种优化尾舵的模态参数,同时与三级海况的频率范围进行对比,选出了更为适合水下航行器的尾舵.

The modal frequency and mode shape of the original rudder are obtained by using computational modal analysis and experimental modal analysis.The accuracy of the original stern rudder finite element model is verified by comparing the test results with the finite element analysis results,and the weak links are analyzed.Based on this,two kinds of optimized stern rudder schemes are put forward,and the modal parameters of the two kinds of optimized rudders are obtained respectively.At the same time,compared with the frequency range of three-level sea state,the more suitable stern rudder for underwater vehicle is selected.