| 非比例阻尼系统动力修改的摄动分析 |
| |
| 引用本文： | 孙久厚,朱德懋.非比例阻尼系统动力修改的摄动分析[J].航空学报,1994,15(12):1486-1489. |
| |
| 作者姓名： | 孙久厚 朱德懋 |
| |
| 作者单位： | 南京航空航天大学振动工程研究所, 南京, 210016 |
| |
| 摘 要： | 讨论了对非比例阻尼振动系统作小修改时,其复频率和复振型的摄动分析方法。当振动系统的质量矩阵、刚度矩阵和阻尼矩阵有较小修改时,不重复求解大型复广义特征问题,在已知初始系统复模态参数的基础上进行复模态坐标变换,用矩阵摄动法给出修改系统的频率、阻尼比和复振型。算例表明,将这种方法用于非比例阻尼振动系统的动力修改,计算简单,费用经济,精度较高,因此是一种行之有效的分析方法。
|
| 关 键 词： | 结构动力学 振动分析方法 振动特性 摄动方法 |
| 收稿时间： | 1993-12-01 |
| 修稿时间： | 1994-01-25 |
PERTURBATION ANALYSIS FOR STRUCTURAL DYNAMIC MODIFICATION OF NON-PROPORTIONAL DAMPED VIBRATION SYSTEMS |
| |
| Sun Jiuhou,Zhu Demao.PERTURBATION ANALYSIS FOR STRUCTURAL DYNAMIC MODIFICATION OF NON-PROPORTIONAL DAMPED VIBRATION SYSTEMS[J].Acta Aeronautica et Astronautica Sinica,1994,15(12):1486-1489. |
| |
| Authors: | Sun Jiuhou Zhu Demao |
| |
| Institution: | Vibration Engineering Research Institute, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 |
| |
| Abstract: | A perturbation method for analyzing the complex frequencies and modes of non-pro-portional damped vibration systems is presented.When the mass,stiffness and damping matrices of the original system vary a little,carrying out the complex modal coordinate transformation based on the original known complex modes and using the matrix perturbation method,the fre-quencies,damping ratios and complex modes of the updated system can be obtained without re-solving a new large generalized complex eigenvalue problem.The numerical example shows that the present method is simple,economic and highly accurate. |
| |
| Keywords: | structural dynamics vibration analysis method vibration characteristics perturbation method |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《航空学报》浏览原始摘要信息 |
| 点击此处可从《航空学报》下载免费的PDF全文 |
|
