基于Wigner-Ville分布裂纹转子识别的仿真  

Simulation on ldentification of Cracked Rotor by Wigner-Ville Distribution

作　　者：邹剑[1] 陈进[1] 董广明[1] 

机构地区：[1]上海交通大学振动,冲击,噪声国家重点实验室,上海200030

出　　处：《上海交通大学学报》2004年第7期1201-1204,共4页Journal of Shanghai Jiaotong University

基　　金：国家重点基础研究发展规划 ( 973 )项目 ( G19980 2 0 3 2 1);国家自然科学基金资助项目 ( 10 1760 14 );振动;冲击;噪声国家重点实验室开放基金资助项目 ( VSN-2 0 0 2 -0 3 )

摘　　要：建立了基于简单铰链裂纹模型的裂纹转子瞬态响应的动力学模型 ,得到了裂纹转子与无裂纹转子的仿真解 ;利用 Wigner- Ville分布比较了裂纹转子与无裂纹转子的时频特性 ,提出了利用 Wigner- Ville分布识别裂纹转子的方法 .数值仿真研究了 Wigner- Ville分布对刚度变化的敏感性 ,讨论了质量偏心和质量偏心角对裂纹转子 Wigner- Ville时频特性的影响 。Based on a simple hinge crack model, the dynamic equation of transient response in a cracked rotor is modeled. The numerical simulation solutions of the uncracked rotor and the cracked rotor are obtained from the model. By Wigner-Ville distribution, the time-frequency features of the cracked rotor and the uncracked rotor are compared and an algorithm using Wigner-Ville distribution to identify the cracked rotor is proposed. By simulation research, the sensitivity of Wigner-Ville distribution to the stiffness variation is investigated, and the influence of unbalance and inhabiting angle on the time-frequency feature is discussed. The time-frequency feature can be used as the criterion for identification of cracked rotor in engineering practices.

关 键 词：裂纹转子 瞬态响应 动力学方程 仿真 

分 类 号：TH113.1[机械工程—机械设计及理论]