本文選題：CPM法 + 安全氣囊��； 參考：《上海交通大學(xué)》2014年碩士論文

【摘要】：安全氣囊是影響汽車安全性能的重要部件之一，其作為整車被動(dòng)安全中約束系統(tǒng)的輔助配置，旨在事故發(fā)生時(shí)，緩解乘員與車內(nèi)構(gòu)件發(fā)生的二次碰撞沖擊，有效地彌補(bǔ)了安全帶約束乘員的局限性，保護(hù)乘員頭部等處。本文基于CPM(Corpuscular Method)法理論進(jìn)行了折疊安全氣囊展開(kāi)仿真及應(yīng)用研究。首先，通過(guò)壓力容器試驗(yàn)及折疊氣囊靜態(tài)離位擺錘試驗(yàn)等安全氣囊基礎(chǔ)試驗(yàn)的仿真，在驗(yàn)證氣體發(fā)生器質(zhì)量流及溫度曲線準(zhǔn)確性的基礎(chǔ)上，開(kāi)展折疊氣囊靜態(tài)展開(kāi)對(duì)OOP(Out-of-Position)乘員胸部位置影響的研究，揭示了CPM法模擬氣囊展開(kāi)過(guò)程的可靠性。其次，基于CPM法與UP(Uniform Pressure)法模擬折疊氣囊靜態(tài)展開(kāi)試驗(yàn)，對(duì)比結(jié)果表明CPM法能有效模擬氣囊內(nèi)高速氣體流動(dòng)。在此基礎(chǔ)上結(jié)合Maxwell-Boltzmann速度分布律進(jìn)行了CPM法設(shè)定不同粒子數(shù)的探討：在熱平衡條件下，粒子數(shù)越多，其速度分布曲線擾動(dòng)減弱平滑趨近Maxwell-Boltzmann理論曲線，，說(shuō)明CPM法可簡(jiǎn)化等效研究氣體分子行為、模擬氣囊展開(kāi)初期高速氣流流動(dòng)，是替代UP法真實(shí)有效地模擬氣囊膨脹過(guò)程的數(shù)值分析方法，對(duì)研究氣囊與乘員尤其是OOP乘員的相互作用具有重要意義。最后，通過(guò)CPM法模擬正碰情況下乘員約束系統(tǒng)中的折疊氣囊展開(kāi)，并與實(shí)車正碰試驗(yàn)結(jié)果對(duì)比得出CPM法模擬能較準(zhǔn)確地反映實(shí)際情況的結(jié)論。結(jié)合驗(yàn)證后的基本模型詳細(xì)分析了約束系統(tǒng)對(duì)乘員的作用過(guò)程及安全帶和安全氣囊對(duì)乘員的保護(hù)效果。
[Abstract]:Airbag is one of the important components that affect the safety performance of the vehicle. As an auxiliary configuration of the restraint system in the passive safety of the whole vehicle, the purpose of the airbag is to alleviate the impact of the secondary collision between the occupant and the internal member of the vehicle when the accident occurs. It can effectively compensate for the limitation of seatbelt restraint and protect the occupant's head and so on. This paper studies the simulation and application of folding airbag based on CPM(Corpuscular method theory. Firstly, the simulation of airbag foundation test, such as pressure vessel test and folding airbag static detach pendulum test, is carried out to verify the accuracy of mass flow and temperature curve of gas generator. The effect of static deployment of folding airbag on the chest position of the occupants of OOPO Out-of-Positionwas studied, and the reliability of CPM method in simulating the process of balloon unwrapping was revealed. Secondly, the static expansion test of folding airbag is simulated based on CPM method and UP(Uniform pressure method. The results show that CPM method can effectively simulate the high velocity gas flow in the airbag. On the basis of this, the CPM method is combined with the Maxwell-Boltzmann velocity distribution law to study the different number of particles. Under the condition of thermal equilibrium, the more the number of particles, the more the velocity distribution curve is, the disturbance of the velocity distribution curve weakens and the smooth approach to the Maxwell-Boltzmann theoretical curve. The results show that CPM method can simplify the equivalent study of gas molecular behavior and simulate the high velocity airflow in the initial stage of airbag development. It is a numerical analysis method instead of up method to simulate the expansion process of airbag in real and effective way. It is of great significance to study the interaction between airbags and occupants, especially OOP occupants. Finally, the folding airbag expansion in the occupant restraint system is simulated by the CPM method, and compared with the results of the real vehicle positive impact test, the conclusion that the CPM simulation can accurately reflect the actual situation is obtained. Combined with the verified model, the effect of the restraint system on the occupant and the protective effect of the seat belt and the airbag on the occupant are analyzed in detail.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U491.61

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