串联双腔双阻尼摇臂式起落架落震性能研究

摘要

The dual-chamber double damping rocker-type tail landing gear of a helicopter is chosen as subjects to investigate in this paper. At ifrst, it establishes the landing gear dynamics model based on the two-mass model, the dual-chamber double damping buffer is taken as two spring-damper vibration systems series-wound. Then build up dynamics model by using MATLAB Simulink module to numerical analysis. A method dealing with multi-cavity mathematical model of the multi-damping buffer landing gear is proposed as wel . Final y, with simulation results, dual-chamber double damping buffer designed to reduce helicopter landing gear sudden peak overload, compared to a single-stage double air chamber buffer landing gear. And the load is relootively stable in high-pressure chamber working section.%以某型直升机双腔双阻尼摇臂式尾起落架为研究对象，将缓冲器等效为串联的两个弹簧阻尼振动系统，建立基于二质量模型的摇臂式起落架落震动力学方程，利用MATLAB. Simulink模块对其进行数值分析，并提出多腔多阻尼缓冲器起落架的数学建模方法。仿真结果表明：相比单级缓冲器，采用双腔双阻尼的缓冲器设计能显著降低直升机起落架的突峰过载，在高压腔工作段，缓冲器载荷比较平稳。