关键词: 鸟撞, 动响应, 应变率, 几何非线性

Abstract: The bird impact on aircraft arc windshield is a complox problem of impact dynamics. The method of equivalent dynamic load is adopted to analyse the bird impact dynamic response for a trainer aircraft arc windshield. The effects of the strain rate on material characterization and the geometrical nonlinearity on the stiffness matrix are emphatically considered in the process of dynamic response analysis. The flexible target load which is suitable to arc windshield is given by studying the bird impact load. The result. of comparing the calculation results with the full scale bird impact tests shout-hat the structure deflection and strain responses are sensitive to the variation of the strain rate and geometrical nonlinearity of structure. The calculation results obtained by considering the effects of the strain rate and the geometrical nonlinearity of structure are in accordance with the test results.

Key words: bird impact, dynamic response, strain rate, geometrical nonlinearity