本文選題：空投 + 氣囊　； 參考：《包裝工程》2017年17期

【摘要】：目的研究某空投緩沖系統(tǒng)圓柱筒式氣囊的緩沖過(guò)程,得出緩沖特性曲線,并校核裝備沖擊過(guò)載。方法基于有限元理論,利用Ansys中的顯示動(dòng)力學(xué)分析軟件LS-DYNA建立氣囊緩沖系統(tǒng)的有限元模型,采用粒子法,對(duì)氣囊緩沖過(guò)程進(jìn)行數(shù)值模擬,并與傳統(tǒng)氣囊仿真所使用的控制體積法進(jìn)行對(duì)比。結(jié)果經(jīng)模擬得出空投著陸緩沖過(guò)程中氣囊排氣口打開(kāi)時(shí)間為63.4 ms,緩沖過(guò)程中的最大過(guò)載為13.3g,獲得了緩沖高度、貨臺(tái)加速度等特性的變化規(guī)律。將氣囊緩沖特性與使用傳統(tǒng)的控制體積法仿真的結(jié)果進(jìn)行了對(duì)比,排氣口打開(kāi)時(shí)間誤差為10.7%,最大過(guò)載誤差為8.6%。結(jié)論 2種方法的結(jié)果對(duì)比一致性較好,驗(yàn)證了粒子法進(jìn)行緩沖氣囊模擬的可行性,同時(shí)使用圓柱筒式氣囊緩沖的最大過(guò)載滿足裝備空投對(duì)過(guò)載不超過(guò)20g的要求。
[Abstract]:Aim to study the buffer process of cylinder airbag in an air drop buffer system, to obtain the buffering characteristic curve, and to check the impact overload of the equipment. Methods based on finite element theory, the finite element model of air bag buffer system was established by using display dynamics analysis software LS-DYNA in Ansys, and the gasbag buffer process was simulated numerically by particle method. And compared with the control volume method used in the traditional airbag simulation. Results the opening time of air bag outlet was 63.4 msand the maximum overload was 13.3 g during the air drop landing buffer process. The characteristics of buffer height and platform acceleration were obtained. The air bag buffer characteristics are compared with the simulation results using the traditional control volume method. The opening time error of the exhaust port is 10.7 and the maximum overload error is 8.6. Conclusion the results of the two methods are in good agreement, which verifies the feasibility of using particle method to simulate the cushioning airbag, and the maximum overload of cylinder airbag buffer can meet the requirement of the overloading of the equipment airdrop less than 20g.
【作者單位】： 軍械工程學(xué)院;
【分類號(hào)】：TB485.1
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本文編號(hào)：2040702