某水下航行器电机支架的动力学分析

振动噪声是水下航行器的重要指标,水下航行器的电机支架是振动传递的关键,因此以某水下航行器电机支架为研究对象,采用CAD软件Sol-id Edge建模,用有限元软件ANSYS Workbench对其进行动力学分析,包括模态分析和谐响应分析。通过有限元计算得到电机支架的固有频率和对应的振型,进而计算出结构的频率响应曲线,分析峰值频率对应的应力与变形,找出电机机架的共振频率,最后评估水下航行器电机支架的动态性能,为支架进一步结构设计提供了理论依据。

Dynamics Analysis of Underwater Vehicle Motor Bracket

Noise and vibration is an important indicator for underwater vehicle, motor bracket of underwater vehicle is the key to the ,vibration transmission, this paper takes motor bracket of some underwater vehicle for research obiect,model building by the CAD software Solid Edge, dynamic analysis which including modal analysis and har- monic response analysis by finite element software ANSYS Workbench. Through finite element analy- sis, the volume got natural frequency and mode shapes of the motor bracket, calculated response curve of the structure under different frequencies, analyzed the stress and deformation at the peak frequency as well as found the resonant frequency of the motor bracket,finally evaluated the dynamic performance of the underwater vehicle motor bracket. The result provides a theoretical basis of further structural design for the bracket.