空投装备缓冲气囊匹配设计与仿真计算研究

目的解决缓冲气囊的研制周期长、成本高而设计效果却不够理想的问题。方法针对这个问题,对缓冲气囊的着陆缓冲过程进行解析建模,然后通过参数的无量纲化,将缓冲气囊的解析计算模型转化成无量纲动力学模型。借助缓冲气囊参数匹配图,根据试验需求对气囊缓冲系统进行匹配设计,然后采用有限元方法对气囊缓冲系统进行建模分析。结果搭建了气囊跌落缓冲试验系统,进行了气囊跌落缓冲试验,通过试验验证了参数匹配方法的有效性,并利用试验数据对有限元仿真计算结果进行了验证,配重平台最大加速度和气囊最大压强的误差分别为1.6%和3.1%。结论有限元仿真的精度可以满足分析要求,基本反映了实际的气囊缓冲特性。

Matching Design and Simulating Calculation of Airbag for Airdropping Equipment

Objective To solve the problem of long development cycle, high cost and unsatisfactory design effect of airbag. Methods In view of this problem, the cushioning process of airbag was modeled by analytical method. Through the non dimensional parameters, the analytical model was transformed into a non dimensional dynamical model. By means of the airbag parameter matching chart, the airbag cushion system was designed for matching based on test requirement. Then the model of airbag cushion system was established and analyzed by the Finite Element Method. Results The airbag cushion test system was built to carry out the drop test. The parameter matching method and simulation result were validated by the drop test. The error of maximum acceleration of counterweight platform and Maximum pressure of airbag were 1.6% and 3.1% respectively. Conclusion The accuracy of the finite element simulation can meet the analysis requirements, basically reflects the accrual airbag buffer characteristics.