本文選題：安全帶卷收器 + 鎖止機(jī)構(gòu)��； 參考：《重慶大學(xué)》2016年碩士論文

【摘要】：由于我國(guó)人口眾多,道路交通設(shè)施落后,車(chē)輛自身安全性能較差,這些因素綜合起來(lái)造成了交通事故的頻發(fā)。安全帶作為汽車(chē)被動(dòng)安全中最有效的防護(hù)裝置,在發(fā)生事故時(shí)起著十分重要的保護(hù)作用。目前,國(guó)內(nèi)外對(duì)于汽車(chē)安全帶的研究主要是基于乘員約束系統(tǒng)方面,應(yīng)用多剛體動(dòng)力學(xué)方法,仿真分析安全帶系統(tǒng)對(duì)假人身體不同部位的損傷情況,而對(duì)安全帶卷收器部件的結(jié)構(gòu)性能研究較少。本文通過(guò)緊急鎖止式卷收器,對(duì)帶感和車(chē)感機(jī)構(gòu)的鎖止性能進(jìn)行參數(shù)分析,并對(duì)卷收器支架進(jìn)行結(jié)構(gòu)強(qiáng)度分析和優(yōu)化改進(jìn),以此綜合提高安全帶卷收器的緊急鎖止性能和約束抗載能力。首先,本文介紹了汽車(chē)安全帶的發(fā)展歷程以及國(guó)內(nèi)外企業(yè)的技術(shù)研究狀況。同時(shí)本文概述了安全帶的種類(lèi)、用途,并掌握了目前應(yīng)用最普遍的緊急鎖止式卷收器的構(gòu)成和工作原理。通過(guò)對(duì)汽車(chē)安全帶國(guó)標(biāo)的解析,熟知了安全帶卷收器的鎖止性能和結(jié)構(gòu)強(qiáng)度要求。其次,對(duì)安全帶卷收器中的帶感鎖止機(jī)構(gòu)和車(chē)感鎖止機(jī)構(gòu)建立了動(dòng)力學(xué)參數(shù)模型。對(duì)于帶感鎖止機(jī)構(gòu),通過(guò)產(chǎn)品實(shí)例分析,得出壓簧的剛度、初始?jí)嚎s量和壓簧作用力距離等參數(shù)對(duì)機(jī)構(gòu)的鎖止加速度均有較大影響的結(jié)論。進(jìn)而利用MATLAB軟件對(duì)模型的參數(shù)進(jìn)行了優(yōu)化,找到符合鎖止條件的最優(yōu)解。對(duì)于車(chē)感鎖止機(jī)構(gòu),將推導(dǎo)的理論方法運(yùn)用到實(shí)例中,經(jīng)計(jì)算發(fā)現(xiàn)車(chē)感臂內(nèi)表面傾角的變化對(duì)車(chē)感鎖止減速度影響很小,而車(chē)感座凹槽面傾角對(duì)鎖止減速度的變化起著關(guān)鍵的作用。通過(guò)計(jì)算分析給出了車(chē)感座凹槽傾角的設(shè)計(jì)范圍,為今后車(chē)感機(jī)構(gòu)的設(shè)計(jì)提供一定的參考。最后,對(duì)卷收器的強(qiáng)度失效形式進(jìn)行了介紹,得到了支架的結(jié)構(gòu)強(qiáng)度對(duì)卷收器總成的安全穩(wěn)定起著決定性作用的結(jié)論。故應(yīng)用ABAQUS對(duì)卷收器模型進(jìn)行有限元分析,得出了支架中最先破裂失效的區(qū)域?yàn)槁菟ǹ赘浇鼌^(qū)域的結(jié)果。結(jié)合分析結(jié)果和工程經(jīng)驗(yàn),對(duì)螺栓孔及其它變形較大的區(qū)域采用局部結(jié)構(gòu)改形和增加筋的方法,得到了強(qiáng)度更高的支架優(yōu)化方案。在章節(jié)內(nèi)容的最后,對(duì)安全帶系統(tǒng)中的織帶、D環(huán)、固定點(diǎn)、帶扣等結(jié)構(gòu)的失效形式也進(jìn)行了簡(jiǎn)要的分析。全文重點(diǎn)對(duì)卷收器的鎖止性能和支架結(jié)構(gòu)強(qiáng)度兩個(gè)方面進(jìn)行了研究,提高了安全帶的安全性能,減小了汽車(chē)被動(dòng)安全失效對(duì)乘員生命造成傷害的可能性。
[Abstract]:Because of the large population, backward road traffic facilities and poor safety performance of vehicles, these factors have resulted in frequent traffic accidents. As the most effective protective device in passive safety, seat belts play a very important role in the protection of accidents. At present, the domestic and foreign researches on seat belts are mainly based on the occupant restraint system. The multi-rigid body dynamics method is used to simulate and analyze the damage of the seat belt system to different parts of the dummy body. However, there is little research on the structural performance of the seatbelt retracer. In this paper, through the emergency locking winder, the locking performance of the sensor and the car sense mechanism is analyzed, and the structural strength analysis and optimization improvement of the winch bracket are carried out. In this way, the emergency locking performance of the seatbelt retractor and the ability to restrain the load are improved. First of all, this paper introduces the development of automobile seat belt and the technical research status of domestic and foreign enterprises. At the same time, this paper summarizes the types and uses of seatbelts, and grasps the structure and working principle of the most common emergency locking reel. The locking performance and structural strength requirements of the seatbelt retractor are well known through the analysis of the national standard of the seat belt. Secondly, the dynamic parameter model of the safety belt retracer is established. Through the analysis of product examples, it is concluded that the stiffness, initial compression and force distance of the spring have great influence on the locking acceleration of the mechanism. Then the parameters of the model are optimized by MATLAB software, and the optimal solution is found. For the car sense locking mechanism, the theoretical method is applied to an example. It is found that the change of the inclination angle of the inner surface of the car sensing arm has little effect on the deceleration speed of the car sense lock. The angle of inclination of the grooves plays a key role in the change of lock deceleration. Through the calculation and analysis, the design range of the inclination angle of the grooves of the car seat is given, which provides a certain reference for the design of the car sensing mechanism in the future. Finally, the failure mode of the winder strength is introduced, and the conclusion that the structural strength of the bracket plays a decisive role in the safety and stability of the winder assembly is obtained. So the finite element analysis of the winder model is carried out by Abaqus, and the results show that the first failure area of the support is the area near the bolt hole. Based on the analysis results and engineering experience, the method of local structural modification and reinforcement is adopted for bolted holes and other areas with large deformation, and the optimum scheme of support with higher strength is obtained. At the end of the chapter, the failure forms of belt D ring, fixed point and buckle are also analyzed briefly. In this paper, the locking performance of the winder and the structural strength of the bracket are studied in order to improve the safety performance of the seat belt and reduce the possibility of the passive safety failure of the vehicle causing harm to the occupant's life.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：U491.61

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 柳實(shí);;汽車(chē)安全帶:守護(hù)生命安全的紐帶[J];汽車(chē)與安全;2014年12期

2 商恩義;鞠春賢;蔣斌慶;秦佳佳;;正碰中安全帶集中對(duì)胸部變形量影響及D環(huán)的改進(jìn)[J];汽車(chē)安全與節(jié)能學(xué)報(bào);2014年03期

3 王鐵;邵麗青;;我國(guó)安全帶行業(yè)發(fā)展現(xiàn)狀與趨勢(shì)[J];汽車(chē)與配件;2014年28期

4 楊陽(yáng);;安全帶的前世今生[J];百科知識(shí);2014年08期

5 王興祥;;汽車(chē)安全技術(shù)的研究現(xiàn)狀及展望[J];科協(xié)論壇(下半月);2013年06期

6 王力;楊蔓;鄭顥;陳炳圣;;基于ABAQUS的汽車(chē)座椅安全帶固定點(diǎn)強(qiáng)度分析[J];客車(chē)技術(shù)與研究;2013年02期

7 鄧國(guó)紅;楊浩;楊鄂川;張勇;;汽車(chē)安全帶固定點(diǎn)強(qiáng)度分析[J];重慶理工大學(xué)學(xué)報(bào)(自然科學(xué));2011年12期

8 孫振東;劉玉光;;汽車(chē)正面碰撞試驗(yàn)中后排乘員傷害特性的研究[J];汽車(chē)工程;2011年08期

9 李勇;胡寧;;汽車(chē)正面碰撞駕駛員胸部損傷影響因素分析[J];汽車(chē)工程;2011年07期

10 趙福全;吳成明;潘之杰;劉衛(wèi)國(guó);劉巍;;中國(guó)汽車(chē)安全技術(shù)的現(xiàn)狀與展望[J];汽車(chē)安全與節(jié)能學(xué)報(bào);2011年02期

相關(guān)博士學(xué)位論文 前1條

1 葛如海;汽車(chē)正面碰撞乘員約束系統(tǒng)匹配研究[D];江蘇大學(xué);2007年

相關(guān)碩士學(xué)位論文 前10條

1 王福星;基于ABAQUS對(duì)高速鐵路環(huán)境振動(dòng)的數(shù)值模擬及振動(dòng)特性分析[D];北京交通大學(xué);2014年

2 王紅;預(yù)緊式乘員安全約束系統(tǒng)仿真[D];華南理工大學(xué);2013年

3 安文姿;車(chē)用負(fù)泊松比安全帶織帶乘員保護(hù)效能研究[D];大連理工大學(xué);2013年

4 汪明瑤;汽車(chē)翻滾碰撞及乘員傷害保護(hù)的研究[D];武漢理工大學(xué);2013年

5 余義;預(yù)緊式安全帶防護(hù)效率研究[D];武漢理工大學(xué);2012年

6 韓洪黎;基于ABAQUS對(duì)某型無(wú)人機(jī)機(jī)翼的有限元分析及局部結(jié)構(gòu)設(shè)計(jì)[D];國(guó)防科學(xué)技術(shù)大學(xué);2011年

7 施磊;車(chē)輛碰撞事故中人體頭部生物力學(xué)響應(yīng)仿真模擬研究[D];華南理工大學(xué);2011年

8 梁宇;乘員約束系統(tǒng)仿真模型的建立及參數(shù)分析與優(yōu)化[D];沈陽(yáng)工業(yè)大學(xué);2009年

9 初永平;汽車(chē)乘員約束系統(tǒng)設(shè)計(jì)參數(shù)改進(jìn)與減小人體損傷的關(guān)系研究[D];江蘇大學(xué);2009年

10 鄧麗梅;汽車(chē)車(chē)身有限元分析與研究[D];武漢理工大學(xué);2007年

，

本文編號(hào)：2055756