关键词: 鸟体本构, 参数识别, 鸟撞平板试验, ISIGHT软件, 数值仿真

Abstract:

Accurate and reliable constitutive and dynamic parameters are the foundation of the structural anti-bird impact design and analysis. To obtain bird constitutive parameters, tests of bird striking on the thin aluminum alloy panel at the velocity of 139 m/s are carried out to measure the impact load, panel displacement and strain. An optimization method for identifying bird constitutive parameters using ISIGHT and PAM-CRASH is proposed, and displacement on the panel center is treated as the optimization objective. A numerical simulation is conducted with the optimized parameters being substituted into the numerical model. Comparison of the test and numerical analysis results shows that the displacement acquired by two different ways presents good consistency, and the impact load acquired by two different ways agrees largely with each other. The identification method for bird constitutive parameters proposed in this paper is proved to be effective and reasonable.

Key words: bird constitutive, parameters identification, test of bird striking on panel, ISIGHT software, numerical simulation