一种鸟体本构模型参数的反演方法  

An Inversion Method of Bird Body Constitutive Model Parameters

作　　者：王卫伟 WANG Wei-wei(Engineering Technology Center,AVIC Xi'an Civil Aircraft Co.,Ltd.,Xi'an 710089,China)

机构地区：[1]中航西飞民用飞机有限责任公司工程技术中心,西安710089

出　　处：《西安航空学院学报》2021年第1期9-12,71,共5页Journal of Xi’an Aeronautical Institute

摘　　要：采用PAM-CRASH中的Monaghan状态方程作为鸟体本构方程,建立鸟撞平板试验耦合算法的数值计算模型,将待优化反演的鸟体本构模型参数定义为优化参数,将位移的试验值与计算值相对误差的平方定义为优化目标,利用ISIGHT和PAM-CRASH有机集成对鸟体本构模型参数进行了优化。用优化后得到的鸟体本构模型参数进行仿真分析,并与试验结果进行对比,结果表明,两者位移大小及趋势基本相同,仿真的撞击载荷与试验测量真实值虽然在峰值载荷上有一定的偏差,但两者之间的趋势具有很好的一致性。这说明鸟体本构模型参数的反演方法是合理的,得到的参数是可信的。In this paper,a numerical model of bird-impact plate test is established based on coupling algorithm by using the Monaghan state equation in PAM-CRASH as the bird body constitutive equation.The original parameters in the bird-body constitutive model were defined as optimization object,and the square of the displacement relative error between the experimental results and the numerical results was the optimization objective,Then the parameters of the bird-body constitutive model was optimized by the seamless integration of ISIGHT and PAM-CRASH.The bird body constitutive model were used to perform the simulation analysis after the parameters was optimized,and the results were compared with the experimental results.The research show that the displacement value and trend are essentially the same.Although there is a certain deviation in the peak impact load between the simulation results and the experiment results,the trend is consistent.Therefore,the parameter inversion method of bird body constitutive model adopted in this paper is reasonable and the optimized parameters are reliable.

关 键 词：鸟撞 本构模型 参数反演 优化 

分 类 号：V215[航空宇航科学与技术—航空宇航推进理论与工程] O347[理学—固体力学]