| 子结构综合法辨识结合部的特征参数 |
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| 引用本文： | 李玲,蔡力钢,郭铁能,刘志峰,赵永胜.子结构综合法辨识结合部的特征参数[J].振动．测试与诊断,2011,31(4). |
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| 作者姓名： | 李玲 蔡力钢 郭铁能 刘志峰 赵永胜 |
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| 作者单位： | 北京工业大学机械工程与应用电子技术学院 北京100124 |
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| 基金项目： | 国家科技重大专项基金资助项目(编号:2009ZX04014-033); 国家自然科学基金资助项目(编号:50905004) |
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| 摘 要： | 为了获取结合部的等效刚度与阻尼参数,采用子结构综合法来建立结合部辨识方程式,利用模型更新的方法修正已知模型,使修正的模型与已知模型等效,并利用修正的模型来获取所需的频响函数,从而根据完备频响函数辨识出结合部参数.为了保证数值计算的稳定性,采用最小二乘原理将矛盾方程转化为定解方程,并引入加权的概念,使得被测数据能够充分利用.最后通过两个仿真算例来验证该方法的可行性和工程实用性.仿真结果可以看出,该方法具有较高的辨识精度.
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| 关 键 词： | 线性结合部 辨识方法 子结构综合法 频响函数 |
Identification of Characteristic Parameters of Joints by Substructure Synthesis Method |
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| Li Ling,Cai Ligang,Guo Tieneng,Liu Zhifeng,Zhao Yongsheng.Identification of Characteristic Parameters of Joints by Substructure Synthesis Method[J].Journal of Vibration,Measurement & Diagnosis,2011,31(4). |
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| Authors: | Li Ling Cai Ligang Guo Tieneng Liu Zhifeng Zhao Yongsheng |
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| Affiliation: | Li Ling,Cai Ligang,Guo Tieneng,Liu Zhifeng,Zhao Yongsheng(College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology Beijing,100124,China) |
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| Abstract: | A new identification method for joint stiffness and damping has been developed by using the substructure synthesis method and finite element method in this paper.Firstly,the identification equation of joint is established according to the equilibrium and compatibility conditions.Then,the finite element models or lumped parameter models of substructures are established and updated,which will be used to replace the real models and to obtain the data needed.In order to ensure the stability of numerical calcula... |
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| Keywords: | joint identification method substructure synthesis method frequency response function |
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