摘要
提出一种碳纤维复合材料参数识别的方法,以层合板单边约束模态试验获得的模态数据为基础,将实测频率与有限元计算频率之差的平方和作为目标函数,把参数识别问题转化为优化问题。对材料参数进行敏感性分析,通过遗传算法识别出复合材料层合板的材料参数。对同一层合板进行自由边界条件下的模态试验,比较使用识别前和识别后参数的计算-实测模态频率误差。结果表明:对同一层合板,使用识别后参数自由模态频率的计算-实测差值更小,说明该方法能准确识别碳纤维复合材料层合板的性能参数。
A method for parameter identification of carbon fiber composite materials is proposed.Based on the modal data obtained from the unilateral constrained modal test of laminated plates,the square sum of the difference between the measured frequency and the calculated frequency of finite element method is used as the objective function to transform the parameter identification problem into an optimization problem.The sensitivity of material parameters is analyzed,and the material parameters of composite laminates are identified by genetic algorithm.The modal tests of the same laminated plate are carried out under free boundary conditions,and the calculated-measured modal frequency errors of the parameters before and after identification are compared.The results show that the difference between the calculated and measured free modal frequencies of the identified parameters is smaller for the same laminate,which indicates that the method can accurately identify the parameters of carbon fiber composite laminates.
作者
徐未凤
阳光武
肖守讷
王明猛
李鹏航
XU Weifeng;YANG Guangwu;XIAO Shoune;WANG Mingmeng;LI Penghang(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《机械制造与自动化》
2024年第6期146-150,163,共6页
Machine Building & Automation
关键词
碳纤维复合材料
参数识别
模态试验
遗传算法
carbon fiber composite
parameter identification
modal experiment
genetic algorithm
作者简介
第一作者:徐未凤(1998-),女,江西上饶人,硕士研究生,研究方向为车辆结构强度及可靠性,1634087241@qq.com。
