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| 基于改变结构刚度模态试验的动力学模型修改 | |
| 引用本文： | 孙晓峰,王轲,施荣明. 基于改变结构刚度模态试验的动力学模型修改[J]. 烟台大学学报(自然科学与工程版), 2011, 24(1) |
| 作者姓名： | 孙晓峰 王轲 施荣明 |
| 作者单位： | 1. 沈阳飞机设计研究所二部,辽宁,沈阳,110035 2. 南京航空航天大学振动工程研究所,江苏,南京,210016 3. 沈阳飞机设计研究所二部,辽宁,沈阳,110035;南京航空航天大学振动工程研究所,江苏,南京,210016 |
| 摘 要： | 提出了一种新的动力学有限元模型刚度与质量矩阵的修正方法.在分别测量原结构动力学系统的模态和改变结构刚度后的动力学系统模态基础上,利用矩阵计算和代数方程求解,计算出原结构有限元模型的刚度、质量矩阵的修正量.文中用实例研究了用非完整模态集进行模型修正时,实测模态阶数与模型修改后刚度、质量阵元素及模态频率、振型的计算精度之间的关系,从而证明了本文所给出方法的可用性以及当误差局限于局部小区域时该方法所具有的易用性与准确性. |
| 关 键 词： | 建模 有限元 结构动力学 模型修正 模态试验 |
Dynamical Model Updating Based on Mode Tests with Changed Structure Stiffness |
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| SUN Xiao-feng,WANG Ke,SHI Rong-ming. Dynamical Model Updating Based on Mode Tests with Changed Structure Stiffness[J]. Journal of Yantai University(Natural Science and Engineering edirion), 2011, 24(1) | |
| Authors: | SUN Xiao-feng WANG Ke SHI Rong-ming |
| Affiliation: | SUN Xiao-feng1,WANG Ke2,SHI Rong-ming1,2(1.Shengyang Aircraft Design and Research Institute 2rd Department,Shenyang 110035,China,2.Nanjing University of Aeronautics & Astronautics,Institute of Vibration Engineering,Nanjing 210016,China) |
| Abstract: | The paper presents a new approach of correcting the stiffness and mass matrices of the finite element model.Based on measuring the original modes of the structure and the new modes with changed structure stiffness,the correction of the stiffness and mass matrices can be obtained by calculating matrices and solving algebra equations.Taking updating models with incomplete modes as the example,the paper makes the research on the relation between the number of the mode order and the correction precision of stif... |
| Keywords: | modeling finite element structure dynamics model updating mode test |
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