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通过对双气腔油气式缓冲器结构参数的合理设计,可以大大提高缓冲器的缓冲性能.针对某型双气腔油气式缓冲器起落架,首先建立其数学模型,利用动力学仿真软件ADAMS中的Aircraft分析模块对缓冲器性能进行仿真分析,得到一系列试验样本点;基于非线性响应面法,利用所抽取样本点,建立了设计变量和优化目标间的数学关系;以缓冲器缓冲效率为优化目标,支柱最大垂直载荷和最大行程为约束条件,对设计变量进行优化;对优化后结构参数进行模拟仿真分析,结果表明优化后结果与仿真结果偏离误差在1.2%以内,拟合函数可信度较高;优化后缓冲器效率较优化前增大4.6%,优化方法切实有效.在对缓冲器仿真分析的基础上,为起落架缓冲器的设计和改进提供一种优化方法,有一定的实用价值.
Through the rational design of the structure parameters of the double air-chamber oil-gas buffer, the cushioning performance of the buffer can be greatly improved.Aiming at the landing gear of a double air-chamber buffer, the mathematical model of the double-air-chamber buffer is established firstly and the dynamic simulation software ADAMS , A series of test sample points are obtained through simulation analysis of the buffer performance. Based on the nonlinear response surface method, the mathematical relationship between the design variables and the optimization objectives is established by using the sampled points. The buffer efficiency of the buffer is Optimization target, maximum vertical load of strut and maximum travel as constraints, the design variables are optimized. The simulation results show that the deviations error between the optimized result and the simulation result is within 1.2%, and the fitting function is credible The optimization is effective and the optimization method is effective.An optimization method based on the simulation analysis of the bumper is provided for the design and improvement of the landing gear bumper, Practical value.