摘要
在给定鸟体本构模型的前提下,通过优化方法自动实现了鸟体材料参数的反演,改变了以往采用的麻烦、费时和主观的手动试凑方法。数值模拟采用接触碰撞耦合算法,优化目标是使试验值与计算结果相对误差的平方和最小。鸟撞铝板算例选用鸟体为塑性动力学本构模型,通过其中两个参数的反演证实了这种方法的正确性和可靠性。鸟体材料参数的反演进一步完善了鸟撞有限元数值模拟的耦合解法,为飞机结构的抗鸟撞研究提供了一定的技术支持。
This paper identifies the bird＇s material parameters automatically by an optimization searching method when bird＇s constitutive model is selected. The method can replace the manual method which is troublesome, time wasting and subjective. A contact impact coupling algorithm is applied to numerical simulation. The optimization objective is to minimize the square sum of percentage errors between test values and calculation results. Identification of two parameters is carried out and testifies the validity and reliability of optimization method when bird＇s constitutive model is selected as plastic kinematics model throughout a bird striking an aluminum panel. Identification of bird＇s material parameters will further perfect the coupling solution of FE numerical simulation for bird strike and provide much technical support for aircraft structures＇ anti-bird study.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2007年第2期344-347,共4页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(10472094)
关键词
鸟撞
本构模型
参数反演
目标函数
铝板
bird strike
constitutive model
parameter identification
objective function
aluminum panel
