基于POD方法的水下航行器振动响应快速求解
Fast Solution of Underwater Vehicle Vibration Response Based on POD Method
王衡 1路宽 1刘骏 2童建忠 2郑伟 2张康宇1
作者信息
- 1. 西北工业大学力学与土木建筑学院,西安 710072
- 2. 沈阳飞机设计研究所,沈阳 110035
- 折叠
摘要
采用本征正交分解(Proper orthogonal decomposition,POD)方法对具有轴承非线性的壳体-电机-转子耦合系统进行模型降阶,以降低计算成本.针对壳体-电机-转子耦合结构采用有限元法建立起192自由度的转子系统模型.介绍了POD法的基本原理及其在壳体-电机-转子耦合系统中的具体表达.通过应用POD方法,壳体-电机-转子耦合系统分别减少到20、18和15个自由度,计算时间降低94%以上,且对比了简化系统和原系统的时间历程曲线和频谱,证明了POD方法的高效性和准确性.
Abstract
The proper orthogonal decomposition(POD)method is used to model the shell-motor-rotor coupled system with bearing nonlinearities to reduce the computational cost.The rotor system with 192 degrees of freedom is modeled by the finite element method for the coupled shell-motor-rotor structure.The basic principle of the POD method and its specific expression in the shell-motor-rotor coupled system are introduced.By using the POD method,the shell-motor-rotor coupled system is reduced to 20,18 and 15 degrees of freedom,and the computation time is reduced by more than 94%.The time course curves and spectra of the simplified system and the original system are compared,which verifies the efficiency and accuracy of the POD method.
关键词
水下航行器/非线性系统/本征正交分解方法Key words
underwater vehicle/nonlinear system/proper orthogonal decomposition(POD)method引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据