深水AUV系统湿模态分析

Wet Modal Analysis of Deepwater AUV System

以国家科技重大专项研制的深水AUV系统为研究对象,借助商业软件ANSYS,从一个新的角度——AUV湿模态分析,研究了各种外界激励的频率特性。为避免AUV发生共振,应保证AUV所受到的各种外界激励的频率远低于AUV的第7阶固有频率,基于此,我们对AUV航行时的干扰源、AUV搭载的机械结构以及AUV附属结构的对于AUV本体的产生的激励频率进行了计算。计算结果显示,低于AUV本体的固有频率,不会对AUV的稳定性产生影响,实现了AUV本体振动不会影响各传感器的正常工作的设计。

From a new angle of the wet modal analysis of AUV （Autonomous Underwa- ter Vehicle）, the characteristics of externally excited frequencies that the AUV which was developed by the major national science and technology projects is possibly subjec- ted to are studied by means of the commercial software ANSYS. To avoid the resonance of AUV, the externally excited frequencies that the AUV is subjected to should be much lower than its seventh order natural frequency. Based on this, the excitation fre- quencies on the AUV body, which are produced by the interference sources occurring during the navigation of the AUV, the mechanical structures carried by the AUV and the accessory structures of the AUV, are calculated. The calculated frequencies are all lower than the natural frequency of the AUV body, indicating that the stability of the AUV can not be impacted on.