本文關(guān)鍵詞：汽車側(cè)面柱碰結(jié)構(gòu)安全性及乘員損傷仿真研究　出處：《蘭州交通大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 汽車被動(dòng)安全 側(cè)面柱碰 車體安全 有限元仿真 乘員損傷

【摘要】：汽車側(cè)面柱碰事故是指汽車在行駛中因多種原因造成其側(cè)面與剛性柱發(fā)生碰撞的事故形態(tài)。在此類事故中,由于車身與柱狀物的接觸面積很小,導(dǎo)致車身局部變形嚴(yán)重,從而使得車內(nèi)司乘人員受到劇烈的二次碰撞,所產(chǎn)生的的傷亡率大大高于車與車之間側(cè)面碰撞的傷亡率。為了完善我國(guó)汽車碰撞安全研究的內(nèi)容,提高汽車在此類事故中的安全性,因而有必要對(duì)汽車側(cè)面柱碰這一事故形態(tài)進(jìn)行研究。本文通過聯(lián)合LS-DYNA與HyperWorks軟件,建立了某乘用汽車在碰撞速度方向與車體縱向軸線成75°角發(fā)生側(cè)面柱碰時(shí)的有限元模型,對(duì)碰撞立面分別通過駕駛員位置處假人頭部中心、肋骨中心、胯點(diǎn),碰撞速度分別為29、32、35 km/h時(shí)汽車側(cè)面柱碰事故的形態(tài)進(jìn)行了仿真�；诜抡娼Y(jié)果,分析了車體碰撞能量在車身各方向的轉(zhuǎn)移路徑,研究了碰撞位置、碰撞速度對(duì)車體結(jié)構(gòu)安全性的影響。之后,又利用仿真方法對(duì)汽車側(cè)面柱碰事故中ES-2RE型假人在碰撞立面通過其頭部中心、碰撞速度為32 km/h工況下的損傷形態(tài)進(jìn)行了研究,并依據(jù)所得數(shù)據(jù)對(duì)車內(nèi)司乘人員身體各部位的損傷進(jìn)行了分析。研究結(jié)果表明:1)當(dāng)汽車發(fā)生側(cè)面柱碰時(shí),碰撞能量最先在車身縱向上開始轉(zhuǎn)移,然后傳遞至車身垂向,最后在車身橫向上結(jié)束。2)在所考慮的汽車側(cè)面柱碰三種位置中,當(dāng)剛性柱軸線與碰撞速度方向構(gòu)成的碰撞立面通過駕駛員位置處假人頭部中心時(shí)最為危險(xiǎn)。3)在碰撞速度為29 km/h、32 km/h、35 km/h三種情況下,車體結(jié)構(gòu)的安全性在速度為32 km/h時(shí)表現(xiàn)最差。4)在此類事故中,車內(nèi)乘員在頭部、下部肋骨與腹部處所受到的傷害最為嚴(yán)重,而人體頸部、骨盆也存在著較大的損傷風(fēng)險(xiǎn)。
[Abstract]:Side column collision accident refers to the accident form in which the side of the vehicle collides with the rigid column due to many reasons. In such an accident, the contact area between the body and the column is very small. The local deformation of the car body is serious, which makes the passengers in the car suffer a severe secondary collision. The casualty rate is much higher than that of side impact between vehicle and vehicle. In order to perfect the research content of vehicle collision safety in our country, improve the safety of vehicle in this kind of accident. Therefore, it is necessary to study the shape of side column collision accident. This paper combines LS-DYNA and HyperWorks software. The finite element model of a passenger vehicle when the impact velocity direction is 75 擄angle with the longitudinal axis of the car body is established, and the impact elevation is passed through the center of the dummy head and the center of the rib respectively at the driver's position. The shape of side column collision accident was simulated at hip point and collision velocity of 29 ~ 32 ~ 35 km/h. Based on the simulation results, the transfer path of vehicle body collision energy in all directions was analyzed. The influence of collision position and speed on the safety of the car body structure is studied. Then the ES-2RE dummy passes through the head center of the collision facade in the side column collision accident. The damage morphology was studied under the condition of 32 km/h impact velocity. According to the obtained data, the damage of various parts of the body of the rider is analyzed. The results show that when the side column of the vehicle is touched, the energy of the collision begins to transfer first in the longitudinal direction of the body. It is then passed to the vertical direction of the body, and finally to the lateral end of the body. 2) in the three positions in which the side column of the vehicle is considered. The collision facade formed by the axis of the rigid column and the direction of the impact velocity is the most dangerous when it passes through the center of the dummy's head at the driver's position) at the collision velocity of 29 km / h ~ (32 km/h). In 35 km/h, the safety of the body structure was the worst at a speed of 32 km/h. 4) in such an accident, the occupant was on the head. The lower rib and abdomen are the most seriously injured, while the neck and pelvis are at great risk.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U467.14

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本文編號(hào)：1407034