摘要
为改善越野车辆的行驶平顺性,提出一种双气室油气悬架。对双气室油气悬架的结构进行了分析,阐述其工作原理,并建立其数学模型。基于某越野车的参数,建立1/4车辆振动模型,通过仿真分别研究双气室油气悬架的各个参数对其车身加速度、悬架动挠度及车轮相对动载的影响。结果表明,内置蓄能器对车轮相对动载影响大于外置蓄能器;外置阻尼器对平顺性的影响大于活塞上阻尼孔的影响。通过对结果的优化确定了双气室油气悬架的参数,分别在时域和频域内对装有双气室油气悬架、单气室油气悬架以及螺旋弹簧的车辆的平顺性进行了对比。仿真结果表明,与单气室油气悬架和被动悬架相比,采用双气室油气悬架可明显改善车辆的行驶平顺性,更适合于越野车辆。
In order to improve the ride performance of the off-road vehicle, a twin-accumulator hydro-pneumatic suspension is proposed. Its structure is analyzed, its working principle is described, and its mathematic model is built. Based on the parameters of an off-road vehicle, 1/4 vehicle vibration model is built. Through simulation, the influence of each parameter of twin-accumulator hydro-pneumatic suspension on the vehicle body acceleration, dynamic deflection of suspension and relative dynamic load of wheel is studied respectively. The results indicate that the interior accumulator has greater influence on the relative dynamic load of wheel than the outside accumulator, and the outside damper has greater influence on the ride performance than the damping hole on the piston. Through optimization of the results, the parameters of twin-accumulator hydro-pneumatic suspension are determined. The ride performance of the vehicle with twin-accumulator hydro-pneumatic suspension is compared with those of vehicles with passive hydro-pneumatic suspension and with coil spring in both time domain and frequency domain. The results indicate that the adoption of twin accumulator system can obviously improve the ride performance of vehicle, and it is more suitable for off-road vehicle.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2009年第5期276-280,共5页
Journal of Mechanical Engineering
基金
国家部委预研资助项目(1030020440802)
关键词
越野车辆
双气室
油气悬架
平顺性
Off-road vehicle Twin-accumulator Hydro-pneumatic suspension Ride performance
