Study on Influencing Factors of Crash Compatibility in Passenger Vehicle Front-to-side Impacts

汽车碰撞兼容性由于能更好地反映真实交通事故,已发展成为被动安全研究领域中最具安全技术潜力的新技术。针对侧面冲击载荷作用下车对车的碰撞兼容性问题,从理论分析和仿真分析角度出发,研究了主要影响因素:两车质量比、汽车前端刚度特性、汽车几何特征对两车碰撞兼容性的影响。结果表明:质量比是影响两车兼容性好坏的关键因素,通过降低汽车前端变形吸能刚度和主吸能位置、提高两车碰撞接触面积等可以提高被撞击车的耐撞性和降低撞击车的攻击性,从而降低所有涉案人员损伤,提高车对车侧面碰撞兼容性。Crash compatibility has been developed as the most potential safety technology in the field of passive safety,for it can describe the crash accidents better than other technologies in real world.This paper,taking the front-to-side crash compatibility as the studying objective,conducted front-to-side impact simulation tests and used crash mechanics to evaluate crash compatibility for passenger vehicles.Meanwhile,main factors affecting self-protection and aggressivity were studied,which includes mass ratio,front-end rigidity of vehicle crush,and vehicle geometry characteristic.The research indicates that the key factor affecting crash compatibility is the mass ratio;decreasing the front-end crush rigidity and the primary energy-absorbing structure position of striking vehicle and increasing the contact area of vehicle crashing can improve the crash compatibility(including crashworthiness and aggressivity),and thus the injury risk of occupants could be reduced.福建省教育厅A类科技项目(JA11239);厦门理工学院科学技术研究项目(JKY10023R

Development of frontal crash energy structure and frontal impact regulation for bus XMQ6900Y

相关统计数据表明：我国客车乘员在重大道路交通事故中所受的伤害情况是非常严重的。其中，因客车碰撞事故导致乘员死亡的，其人数占客车乘员总死亡人数的54.79％，有足够强度和刚度的客车，在正面碰撞、翻车事故中其乘员伤亡的人数明显少于严重变形或散架客车上的乘员伤亡人数。在进行客车自身结构安全的改善和保证方面，需要依靠规范的试验进行验证，目前，我国还没有完善的法规和验证标准。 本研究选取公司现生产主力半承载车型XMQ6900Y整车车身骨架开展正面碰撞分析，设计一套可工程实施的溃缩机构方案植入胎体结构，按照标准GB11551-2003开展整车试验。通过计算仿真和整车试验技术，使车身骨架结构受力更加合理，...Relevant statistical data show that bus &coach occupant have serious injury severity in the traffic accident in China. And 54.79 percentile of bus passenger died of bus collision accident. The death number of occupant casualties in buses that have sufficient strength and rigidity is significantly less than the buses that are severely deformed or rickety during the frontal collision and rollover ac...学位：博士后院系专业：物理与机电工程学院_车辆工程学号：201117002

Crash compatibility of a light truck vehicle to a passenger car: The relationship between delta velocity and occupant injury severity

研究了真实世界事故中、侧面冲击载荷作用下轻型卡车与轿车驾乘人员的损伤位置分布。采用了美国国家汽车取样系统/耐撞性数据库(nASS/CdS)近136万个碰撞兼容性案例,将所有驾乘人员损伤等级分为MAIS0-7和MAIS3+两种情况,在不同速度下,以涉案撞击车和被撞击车在碰撞前后的速度变化值为变量,分析了乘员不同损伤部位(头部/面部/颈部、胸部、骨盆、上肢和下肢)的损伤分布。结果表明:撞击车乘员受损速度区间比被撞击车偏大,乘员损伤风险偏低。因此,从碰撞兼容性角度考虑,减少驾乘人员的骨盆损伤,可以减少所有涉案乘员损伤风险机率。This paper analyzes the distribution of injured occupants in side impact collisions of light truck vehicles to passenger cars in the real world.The injury levels were divided into MAIS 0-7 injured occupants and MAIS 3+ injured occupants.The injury distribution of five main seriously injured body regions (including head/face/neck, chest, pelvis, upper extremity and lower extremity) was investigated at delta velocity before and after crash, using the delta velocity of struck and striking vehicles as the variable, according to 1.36 million weighted crash compatibility cases extracted from the US National Automotive Sampling System (NASS) / Crashworthiness Data System (CDS) database.The results show that the delta velocity of striking vehicle is larger than that of the struck vehicle, and the occupant injured risk ratio is lower than that of the struck vehicle.Therefore, avoiding the pelvis injury of drivers and passengers can reduce the risk of total occupants involved in the collisions in consideration of crash compatibility.厦门理工学院科技研究项目(JKY10023R);福建省教育厅科技项目(JA11239

Simulation Study on Front Impact Safety of Medium Coach

建立半承载式中型客车的正面碰撞有限元模型,采用lS-dynA软件进行仿真分析。结果表明,该车驾驶室变形较大、完整性较差,需对客车前部吸能结构进行优化设计。The finite element model of front impact of medium coach is built,which body is semi-integral type.Using LS-DYNA software,the front impact safety is simulated.The results indicate that the drive cab deformation is bigger and its integrality is worse,so it is necessary to optimize the front absorbing structure components to the coach drive cab.交通部西部交通科技项目(2009318000043);福建省教育厅科技项目(JA11239);厦门理工学院科技项目(JKY10023R);福建省自然科学基本项目(2012J05103

Simulation Study for Sedan in Side Impact Based on Regulation FMVSS 214

为更好地分析汽车侧面碰撞过程中驾乘人员安全,根据美国联邦机动车安全法规fMVSS214碰撞要求,采用显式有限元分析软件lS-dynA详细建立了某公司轿车有限元整车模型和可变形移动壁障有限元模型,研究了美国侧面碰撞规程下可变形移动壁障以54 kM/H速度撞击轿车侧面的变形侵入过程仿真模拟和轿车侧面车门不同水平级的变形侵入对乘员损伤程度的影响。结果表明:有限元模拟结果与实车碰撞试验结果吻合较好,模型可信;轿车车门中部位置对驾乘人员损伤影响最大,乘员损伤AIS值接近3(严重损伤);参数加权平均变形侵入量能较好的反映车辆侧面碰撞下车身侧围的变形侵入情况。In order to in-depth study the protection of passenger and drive in side impact,according to the regulation FMVSS 214,built a finite element model of full-scale for a sedan and MDB using explicit analysis software LS-DYNA,studied the simulation progress of crush intrusion under the procedure of US side impact,which the MDB as a striking vehicle impacted the side structure of sedan by 54 kilometer per hour,and analyzed the relationship between the crush intrusion of different levels of side door and occupants injury.The research results indicated that the side impact simulation model was validated correctly by full-scale crash testing;the location of mid-door of sedan side structure had attributed to occupants injured seriously,the value of abbreviate injury scale(AIS) was close to 3;the parameter titled weighted average crush intrusion was used to response completely the deformation of side body of vehicle in side impact.厦门理工学院科学技术研究项目(JKY10023R

Reverse Dynamics Structure Factors for Lumped-parameter Model in Vehicle Front-to-side Impact

集中参数模型被广泛用来进行侧面碰撞安全分析,求解模型参数的方法主要有整车准静态试验法和整车有限元线性化法,综合这两种方法的优点,提出了一种非线性反求法。该方法利用分段参数修匀对gb20071-2006法规试验车侧面碰撞测试数据进行拟合,将拟合后的结果作为系统输入,通过MATlAb软件建立侧面碰撞下汽车集中参数非线性动力学系统模型。利用该反求模型可反求出汽车吸能部件和假人结构部件的刚度特性,与试验法和线性化法的结果相比,利用该反求模型反求出的刚度值非线性特征明显,更接近真实值。The lumped-parameter model has been used widely to analyze the vehicle safety in front-to-side impact.There are two methods that full-scale vehicle quasi-static test and finite element simulation impact to obtain the factors of lumped-parameter model.Based on the two methods,a new method titled nonlinear reverse was developed.The least square function of piecewise parameter approximation was used to fit the test data of front-to-side impact according to the rules of China.Inputting the results a lumped-parameter model of nonlinear dynamic system in vehicle front-toside impact was built by using MATLAB software.Then the rigidity characteristics of the lumpedparameter model,and the structure components of dummy were reversed,and the results were compared with that of testing and linear methods.The rigidity characteristics reversed present nonlinear which are more close to truth values.福建省自然科学基金资助项目(2012J05103);福建省教育厅科技研究项目(JA11239);厦门理工学院科技研究项目(JKY10023R

洋河大曲产核苷功能菌的研究

利用涂布法、划线法等技术手段,从洋河成品大曲中分离得到1株代谢产生核苷类健康功能因子的丝状真菌。利用形态观察和分子生物学相结合的技术手段,将核苷代谢功能菌鉴定为横梗霉。高效液相分析表明,该菌可代谢产生具有重要生理活性的次级代谢产物——腺苷和尿苷。该研究为核苷健康功能菌在中国白酒酿造中的应用奠定了基础