某型复合材料扁簧式起落架落震性能研究

摘要

The leaf spring landing gear has the characteristics of nonlinear deformation.The objective of this paper is to establish a rigid coupling model for composite leaf spring.The model is basing on the mo－dal superposition theory.The analysis is carried out by using LS-DYNA software for solving the drop model.A drop test analysis is conducted to obtain the key parameters that characterize the cushioning per －formance.It shows that the simulation datum agree well with the experimental datum ,which verified the accuracy of the dynamic model.The results shows that the maximum difference of distance ,peak accelera－tion and peak overloud are 6.5%,10.6%and 9.7%.%针对扁簧式起落架落震过程具有非线性大变形的特点,结合模态叠加理论,基于LS-DYNA非线性动力学平台建立了复合材料扁簧式起落架落震过程的刚柔耦合模型,并采用显示积分法对落震模型进行求解,依据所建的落震试验平台,测试了扁簧落震的相关参数,并将试验结果与非线性动力学仿真分析结果进行了对比分析,结果表明,所建动力学仿真分析结果与落震试验结果趋势吻合,位移最大误差为6.5%,最大峰值加速度误差为10. 6%,最大峰值过载误差为9.7%.