油气悬架非线性刚度模型的统计线性化分析  

Statistic linearization analysis of the nonlinear stiffness model for hydro-pneumatic suspensions

作　　者：曹树平[1] 易孟林[1] 罗晓玉[1] 

机构地区：[1]华中科技大学机械科学与工程学院

出　　处：《华中科技大学学报（自然科学版）》2002年第6期10-12,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：针对特定结构的单气室油气弹簧 ,建立了包含刚度、阻尼和摩擦等非线性特性的非线性数学模型 .通过对油气弹簧非线性弹性力的深入分析 ,提出了可以将弹簧刚度简化成平方非线性的观点 .利用随机振动理论对油气悬架的非线性刚度模型进行了统计线性化分析 ,得到了统计意义下的油气悬架的刚度线性化模型 .仿真结果表明 ,油气弹簧的刚度随车辆载重的增加而增大 。A nonlinear mathematical model was presented for a specially designed hydro pneumatic spring having a single gas chamber. The stiffness, damping and friction characteristics of the hydro pneumatic spring were formulated in this model. By the analysis of the nonlinear force of the hydro pneumatic spring, the spring′s stiffness can be simplified as a square nonlinear function. The nonlinear stiffness model of the suspension was analyzed through statistic linearization with random vibration theory, and a linearizing stiffness model was derived for the hydro pneumatic suspension. The simulation results reveal that the spring′s stiffness is increased with the increment of vehicle′s loads, but it is slightly decreased with the increment of the characteristic coefficient of roads.

关 键 词：油气弹簧 悬架刚度 非线性 统计线性化 车辆 

分 类 号：U463.334.3[机械工程—车辆工程]