摘要
随着我国社会经济的迅速发展,乘用车市场的产能需求和汽车的性能要求越来越高。这就要求各汽车生产供应商在不断提高产能的同时,也要提升汽车及零部件的性能。悬架系统作为汽车底盘的关键部分,对汽车的行驶安全可靠性和使用性能都有重要影响,也是现代汽车设计研究的热点部分。文章以江淮S2的扭力梁式后悬架为研究对象,运用CAE方法对扭力梁的结构强度和运动特性进行了分析。利用扭力梁式后悬架的三维几何模型,建立了扭力梁悬架的有限元模型。根据汽车实际行驶中扭力梁悬架的受力特点,选择了转向1g,制动1g,垂直3.5g,启动1g,组合等五种常见工况,对该悬架进行静强度分析,得到了各工况下的悬架应力分布及其原因,并得出悬架满足极限工况下的强度要求。针对扭力梁悬架进行了双轮同向、反向激振仿真试验和侧倾仿真试验,分析了扭力梁悬架的K&C特性,为悬架的设计研究提供依据。
With the development of our society and economy, the passenger car market is becoming increasingly booming, and people’s demand for passenger car is growing day and day, meanwhile higher and higher petitions are asked by customers, all which require each car manufacturer and supplier not only to increase production capacity but also to improve the performance of automobile and its parts. As the key part of chassis, suspension system plays an important role in car’s driving safety, reliability and performance, and it is also the study topic of modern auto design. In this paper, the structural strength, fatigue life and dynamic characteristic of the torsion beam rear suspension for an intermediate car are analyzed based on CAE method so as to improve its reliability and Kinematics ＆ Compliance property. Finite element model of the torsion beam suspension is built according to the 3-D model supplied by manufacturer. Based on the suspension’s mechanical characteristic in actual driving, three common conditions are chosen, which contain impact load condition caused by uneven road, limit torsion condition and max lateral force condition, suspension stress distribution and its reasons are gained through the static strength calculation, besides, it is concludedD that the strength of this suspension meet the requirement under the limit driving condition. The full vehicle model and virtual road for durability test are built by means of multi-body dynamics method. According to the “the specification of Hainan proving ground for automobile type approval and reliabi -lity driving test”, the suspension’s fatigue durability is tested on virtual road. Parallel wheel travel and roll test are simulated, and the K＆C characteristics are analyzed, which can provide basis for suspension design and research.
出处
《汽车实用技术》
2017年第21期102-108,共7页
Automobile Applied Technology
关键词
扭力梁式后悬架
仿真试验
结构强度
K&C特性
Torsion beam rear suspension
Simulation Modal stress recovery
structure intensity
Kinematics ＆ Compliance property
