Lightweight structures in bus body design have been highlighted. In this investigation a new typical medium-sized structure has modelled and analysed using the computer aided (CAD) package UG finite element (FE) solver ANSYS. This paper presents comparative analysis of two side structures: with without structural supporting members between longitudinal waist beams frames. Firstly, strength stiffness for low-order vibration modes was carried out, effects different on strength, rigidity...

Collision avoidance is an important requirement for self‐driving systems, particularly in high‐speed scenarios, where a multi‐state coupled motion makes it difficult to simultaneously reach the required accuracy, efficiency, and universal feasibility different obstacle‐avoidance behaviour. For complexity, hierarchical collision‐avoidance strategy proposed that refines requirements travelling under such scenario into two levels, general special. At level, moving elliptical contour of subject...

Thermal conditions are strongly changeable in a vehicle cabin, where passengers could suffer consecutive self-thermoregulation to such dynamic changing thermal stresses, though its HVAC system works well. To observe human overall and local sensations conditions, series of experiments under various were carried out cabin-like climate chamber. The results showed that the head, chest, back, hands during hot exposure warmer leading sensation being hot. head was than sensation. During cold...

AbstractFrom 1990 to approximately 50,000–120,000 people die annually of road traffic accidents in China. Traffic are the main cause death Chinese adults aged 15–45 years. This study aimed determine biomechanical response and injury tolerance human body accidents. The subject was a 35-year-old male with height 170 cm, weight 70 kg characteristics at 50th percentile. Geometry generated by computed tomography magnetic resonance imaging. A human-body model then developed. featured great detail...

The occupant's pelvis is very vulnerable to side collision in road accidents. Finite element (FE) studies on pelvic injury help design occupant protection devices improve vehicle safety. This study was aimed develop a highly biofidelic model of Chinese adults and assess its sensitivity variations cortical bone thickness, material properties, loading conditions.In this study, 4 different FE models the were developed from computed tomography (CT) data volunteer representing 50th percentile...

Coach rollover is one of the most dangerous accidents with respect to fatalities and injuries. The superstructure a coach has an essential vital impact on crashworthiness. To design optimal requires that effects configuration crashworthiness are thoroughly understood. In order find guidelines for configurations, this paper studied influence resistance performance. A baseline finite element (FE) model intercity semi-integral body developed. Seven FE models derived basis considering different...

Human-driven vehicles and different levels of autonomous are expected to coexist on roads in the future. However, systems behave differently from their human-driver counterparts, these two behaviors incompatible with one another, thereby negatively impacting traffic efficiency safety. Herein, we present construction human-like trajectories for use as a possible solution this issue. We trajectory planning method based spatiotemporal geometric transformation driving scenarios generate...

This article has been retracted by the publisher.

The vibration transmission paths in a sport-utility vehicle with frame structure were used to evaluate the coupled of each link. This method was based on path an "engine-powertrain mount system-frame-vehicle body suspension-body-driver seat rail," and research objective improve characteristics cab. transfer analysis combined experiment establish model finite element simulation model. With this method, level driver's rail reduced engineering practice effectively applied framed SUV cabin.

AbstractAbstractAluminium foam has been adopted as one of the light filler materials in auto body structural components because its excellent energy-absorbing ability and lightweight which play a key role reducing weight improving safety. This paper combines porosity aluminium material application car's crashworthy structures to present energy-absorption behavior effect evaluation. First, focuses on energy absorption by experimental study. All experiments were performed with specimens...

Human liver biomechanical responses associated with frontal impacts, lateral impacts were studied using a simplified Chinese human body Finite Element Model (FEM) more geometrical-accurate model for an average adult male from high resolution CT data. The developed in this paper was composed by geometrically detailed model, models of thoracic-abdominal organs, and the skeleton model. Then, whole validated at various velocities comparing simulation outcomes Post Mortem Subjects (PMHS)...

摘要: 开关磁阻电机具有结构简单、成本低和调速范围广等优势,但其双凸极结构和控制器的开关特性,导致存在转矩脉动现象,使得抑制转矩脉动成为焦点问题。首先从开关磁阻电机的结构和运行机理出发,针对线性解析方法难以分析转矩特征的问题,建立电机有限元模型求解出转矩特征并进行样机验证试验。分析样机结构参数对转矩脉动的影响,针对结构参数耦合问题,选择NSGA-Ⅱ算法在参数优化平台上对样机结构参数进行多目标寻优,在保证优化后样机的转矩脉动系数和平均转矩均优于初始电机的条件下,最终获得样机最优化结果。结果表明,不同结构参数对电机转矩的影响有较大的差异,对结构参数的优化能有效地抑制转矩脉动,该参数优化方法可以为开关磁阻电机结构性转矩脉动抑制提供参考。

SUV (Sport UtilityVehicle, SUV) HCG (Height of Center Gravity) is higher, relatively low rollover stability, higher accident rate has become an important issue for cars safety.In this paper, Firstly, four-DOF kinematics theoretical vehicle model was established，then combined with a development and design work built complete multi-body dynamics in ADAMS / Car.Based on steady state constant radius handling case transient sine-swept case, the dynamic calibrated corelated to test results.At...

In order to accurately simulate the crush process of power battery pack, ductility failure criterion was introduced. The parameters aluminium alloy materials were obtained by tensile test samples under different stress triaxialities and finite element simulation. To evaluate resistance profiles, concept specific force proposed, sections extruded profiles compared, relationship between angle thickness reinforcement summarised. result shows that form have a great influence on section. research...

Abstract: To solve the problem of complex non-uniform dynamic heat transfer between inner and outer layers automotive structures, which is difficult to calculate accurately in current researches single-layer structure, an analysis method multi-layer model coupled with multi-factor natural environment proposed on basis all-weather temperature characteristic test automobile. Compared structure model, error less than 10%, has higher accuracy. The distribution characteristics occupant zone are...

The occupant's pelvis is most susceptible to injuries in side collision accidents. To further investigate the biomechanical responses and injury mechanisms impacts, a biofidelic finite element (FE) model was created. In contrast previous studies, based directly on CT data of volunteer representing 50th percentile Chinese male. Both cortical cancellous bone were modeled with hexahedral elements. Through validations against Post Mortem Human Subjects (PMHS) tests, under impacts analyzed....

In this study, a Finite Element (FE) model of adult occupant was developed to investigate the thoracic and abdominal injuries caused by seat belt wearing. A geometry created from CT data volunteer representing 50th percentile Chinese male. The anatomical structures physical characteristics were modelled same as those in real human body. Especially thorax abdomen included details ribcage, lumbar spine, pelvis, internal organs, skin, muscles, ligaments, main arteries veins, other soft tissues....