摘要
针对鸟撞飞机结构耦合解法中鸟体建模问题所遇到的困难,以鸟体正撞平板数值分析得到的计算解与试验基准解的离差作为驱动演化过程的动力,基于非线性最小二乘法和外点罚函数法,将参数反演问题转化成无约束非线性最优化问题来求解,并利用ANSYS环境下的二次开发语言APDL(ANSYS Parametric Design Language),建立了参数反演系统,对鸟体材料参数进行了反演。结果表明该方法是可行和有效的。
The modeling of bird impact aircraft structure is difficult in coupling solution. Through the analysis of bird normal impact fiat plates, the amount of dispersion between numerical solution and experimental solution is used as the power in the driving evolution process. Based on the nonlinear least square and penalty function method, the parametric inversion problem is transformed into an unconstrained nonlinear optimal problem. The parametric inversion system is established with application of the language APDL of ANSYS, and then the bird material parameter inversion is carried. Example shows that the proposed method is effective.
出处
《航空计算技术》
2007年第6期1-4,共4页
Aeronautical Computing Technique
基金
国防科技工业民用专项科研技术研究项目资助
关键词
鸟撞
材料参数
反演
非线性最优化
APDL
bird impact
material parameter
inversion
nonlinear optimization
APDL
