| 基于预处理共轭梯度算法的有限元模型修正方法 |
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| 引用本文： | 李春生,向锦武,罗漳平.基于预处理共轭梯度算法的有限元模型修正方法[J].飞机设计,2010,30(5):12-15. |
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| 作者姓名： | 李春生 向锦武 罗漳平 |
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| 作者单位： | 北京航空航天大学,航空科学与工程学院,北京,100191 |
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| 摘 要： | 在预处理共轭梯度算法的基础上,提出了一种新的有限元模型修正方法。该方法利用有限元模型的特征方程和试验数据的特征方程相互交叉建立模型修正的数学模型,在质量矩阵和刚度矩阵满足正交性条件和特征方程的约束下,然后利用预处理共轭梯度算法修正方程的数值解。通过算例对该方法进行数值验证,并与其他方法进行了比较,结果表明计算方法提高了模型修正精度,收敛速度快,合理、可行。
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| 关 键 词： | 模型修正 有限元 ICMCM |
Structure Dynamic Model Updating Method Based on Quadratic Constraint |
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| LI Chun-sheng,XIANG Jin-wu,LUO Zhang-ping.Structure Dynamic Model Updating Method Based on Quadratic Constraint[J].Aircraft Design,2010,30(5):12-15. |
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| Authors: | LI Chun-sheng XIANG Jin-wu LUO Zhang-ping |
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| Institution: | LI Chun-sheng,XIANG Jin-wu,LUO Zhang-ping(School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China) |
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| Abstract: | The paper presents a new sub-structural method for structural dynamic model updating.Based on the datum from both experiment and FEM,a mathematical model for model updating,which satisfies the orthogonality conditions and eigen equations of model theory is built in this paper.Adding iteration algorithm to the quadratic constraint optimization method,this model can be solved.Comparing with the least square algorithm for quadratic constraint,this iteration algorithm is proved to be rational and feasible with ... |
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| Keywords: | model updating FEM ICMCM |
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