基于不同位置阻尼组件的连通式油气悬架振动性能  

Vibration performance of interconnected hydro-pneumatic suspension based on the damping assembly at different positions

作　　者：孙船斌 马大为[1] 朱忠领[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械设计》2015年第9期34-40,共7页Journal of Machine Design

摘　　要：针对不同位置的阻尼组件,基于连通式油气悬架,建立了考虑各元件非线性和路面输入相关性的单桥四自由度车辆振动模型。研究悬架参数对行驶平顺性的影响,结果表明,对于阻尼组件上置悬架的平顺性,蓄能器的初始充气压力和体积、阻尼孔径和油管内径均是重要影响因素,单向阀过流截面积和油管长度影响较小;对阻尼组件下置悬架的平顺性,阻尼孔径和油管内径均是主要影响因素,其他参数影响相对较小。兼顾悬架动挠度、车轮动载及道路友好性,基于遗传算法对悬架参数进行平顺性优化,分别在时域和频域内对比了连通式悬架和独立式悬架的车辆行驶性能,结果表明,相对于阻尼组件下置悬架,阻尼组件上置悬架的行驶性能指标均较好;连通式悬架明显提高了行驶平顺性,但增大了悬架的动挠度和车轮动载。Aiming at the damping assembly of different positions, physical and mathematical models were built based on 4- DOF single-axis vehicle model attached with the interconnected hydro-pneumatic suspension （HPS） in consideration of the non- linear characteristics of all components and the correlations between the wheels. The influence of interconnected HPS parameters on the ride comfort was studied. The results show that, toward ride comfort of the damping assembly upside suspension, accumu- lator initial pressure and volume, orifices size and tube diameter are the main factors ; toward ride comfort of the damping assem- bly below suspension,orifices size and tube diameter are the main factors,and the other factors are less affected. Parmneters op- timization based on genetic algorithm were conducted for the ride comfort in consideration of dynamic deflection of suspension, relative dynamic load of wheel and road-friendliness, the vehicle performance of interconnected HPS is compared with indepen- dent HPS in both time domain and frequency domain. The results show that the ride comfort of damping assembly upside sus- pension is better than damping assembly below suspension;the interconnected HPS system can obviously improve the ride com- fort, hut the dynamic deflection of suspension and relative dynamic load of wheel will be increased.

关 键 词：油气悬架 阻尼组件 平顺性 优化 

分 类 号：U463.33[机械工程—车辆工程]