摘要
基于边界元法,本文提出了平面正交各向异性体材料参数识别算法。通过构造以测量位移与边界元计算的相应位移之差的平方和作为目标函数,采用Levenberg-Marquardt方法迭代极小化目标函数,从而把参数识别问题转化为极小化目标函数的问题。同时在识别过程中考虑了测量位移含正态分布的误差,研究测量误差对参数识别结果的影响。算例表明本文提出的参数识别方法是有效的。
A material parameter identification algorithm is proposed for plane orthotropic material bodies based on the boundary element method.The material parameter identification problem is formulated as the problem of minimizing the objective function defined as a square sum of differences between the measured and calculated data on displacements.Levenberg-Marquardt method is used to solve the minimization problem.The normal distribution error in displacement measurement is simulated to study the effects of error on the identified results.Numerical example shows that the proposed method for parameter identification is feasible and effective.
出处
《玻璃钢／复合材料》
CAS
CSCD
2010年第5期35-39,共5页
Fiber Reinforced Plastics/Composites
基金
广西科学基金项目(桂科自0728005)
广西教育厅科研项目(桂教科研[2006]26号)
关键词
平面正交各向异性体
边界元法
参数识别
plane orthotropic material bodies
boundary element method
parameter identification
