| 非自伴随振动系统的模态参数识别问题 |
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| 引用本文： | 洪钟瑜,郑万泔.非自伴随振动系统的模态参数识别问题[J].振动工程学报,1989(2). |
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| 作者姓名： | 洪钟瑜 郑万泔 |
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| 作者单位： | 上海机械学院
(洪钟瑜)，南京汽轮电机厂(郑万泔) |
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| 基金项目： | 上海市自然科学基金资助项目 |
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| 摘 要： | 本文研究了n个自由度的质量、刚度、阻尼矩阵都不对称的所谓非自伴随振动系统的特征问题,讨论了它与自伴随系统的差别,应用它与伴随系统的双正交性,状态向量方程仍能去耦简化为2n 个单自由度方程,在此基础上求得了在任意激振力下系统的瞬态响应,导出了传递函数的表达式,并研究了该系统的模态试验和模态参数识别方法,指出其试验和计算工作量与自伴随系统一样,但是只能应用传递函数矩阵的某一列元素的试验数据。
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| 关 键 词： | 模态 参数识别 非自伴随振动系统 |
The Modal Parameters Identification of a Non-Self-Adjoint Vibration System |
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| Hong Zhongyu.The Modal Parameters Identification of a Non-Self-Adjoint Vibration System[J].Journal of Vibration Engineering,1989(2). |
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| Authors: | Hong Zhongyu |
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| Affiliation: | Hong Zhongyu (Shanghai Institute of Mech.Engineering)
Zheng Wangan (Nanjing Gas Turbine Institute) |
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| Abstract: | In this paper,the characteristics of a system of n degrees of freedom withunsymmetrical mass,damping and stiffness matrices,i.e,a so called non-self-adjoint system,are studied.The difference between this system and a self-adjointone is discussed.Using the dual-orthogonal quality between this system andits adjoint one,the state vector equation can still be decoupled.Based onthis study the transient response and transfer function under arbitrary excita-tion and the calculating modal parameters is discussed-as well.1t showsthat the testing and calculating works is the same as that in the self-adjointsystem,but it can use only one column testing data of the transfer functionmatrix rather than one row or one column for the self-adjoint system. |
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| Keywords: | modal parameters identification non-self-adjoint vibration system |
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