超空泡水下航行体的结构动力响应特性

张劲生; 张嘉钟; 魏英杰; 曹 伟

超空泡水下航行体的结构动力响应特性

哈尔滨工业大学航天学院, 哈尔滨 150001

基金项目: 国家自然科学基金资助项目(10802026)

详细信息

作者简介:
张劲生(1976-),男,黑龙江哈尔滨人,博士生,zjn88@126.com.

中图分类号: O 351.3; O 326
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- 被引次数: 0
出版历程
- 收稿日期: 2009-06-25
- 网络出版日期: 2010-04-30

Structural dynamic response characteristics of supercavitating underwater vehicles

School of Astronautics,Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 通过综合有关文献的理论,得到作用于超空泡水下航行体尾部的冲击载荷与航行速度的关系,然后利用有限元法研究了在不同速度条件下航行体的结构动力响应和变形特性.得到了加速度响应的主频率及其取值区间、航行体内的最大应变值及其分布位置;并给出了加速度响应主频率以及航行体内最大应变值与运动速度的关系.计算结果表明:存在2个加速度响应主频率,当航行体航速相对较低时,应采用第1个主频率作为结构设计时的参考频率,速度较高时应采用第2个主频率;计算还表明:航行体内最大应变值随着航速的增加而显著增加.结果对超空泡水下航行体的结构强度分析和结构优化设计有着指导意义.
- 空化 /
- 结构动力响应 /
- 弹性变形 /
- 有限元法
Abstract: The relation between the impact loads on supercavitating underwater vehicle’s tail and the vehicle’s velocity was advanced firstly, with the method of combining the conclusions. Then, the structural response and deformation characteristics of the vehicle were studied by finite element method (FEM). The dominant frequencies of the acceleration responds were obtained. The maximum strains of the vehicle and their locations were gotten. And the relations between the dominant frequencies and the vehicle- velocities, the maximum strains of the vehicle and the vehicle- velocities were discussed. Simulation results indicate that there are two dominant frequencies. If the vehicle-s velocity is relatively small, the first dominant frequency should be chosen as reference frequency for structure design, and the second one should be chosen for relatively large velocity. The simulation results also indicate that the maximum deformations of the vehicle increase with the increase of the vehicle-s velocity. These results would be helpful for structure strength analysis and optimum structure design of supercavitating underwater vehicles.
- cavitation /
- dynamic response /
- elastic deformation /
- finite element method

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参考文献(1)

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