基于ADAMS与AMESim的油气悬架密封圈阻尼作用影响分析

Performance Effect Analysis of Damping of Ring Seal on Hydro-pneumatic Suspension Based on ADAMS and AMESim

油气悬架在工程自卸车中应用普遍,密封圈作为重要组成单元,摩擦作用产生阻尼对油气悬架性能具有重要影响。针对油气悬架密封圈阻尼作用的影响进行分析,建立单气室油气悬架的数学模型。基于ADAMS搭建二自由度的1/4自卸车的悬架模型,基于AMESim搭建油气悬架数学模型,二者联立搭建油气悬架整个工作系统的分析模型,采用正弦性周期激励作为系统输入,对密封圈阻尼作用影响进行分析。搭建油气悬架试验台,对系统特性进行分析,根据试验结果对分析模型进行修正并对模型的准确性进行验证。结果可知:考虑密封圈阻尼作用影响时,当簧载质量发生变化时,修正后模型使得车身加速度和车轮相对动载荷的最大值都明显降低,整车性能改善明显;对比分析可知修正后模型的准确性与可靠性;为此类自卸车悬架系统设计研究提供参考。

The hydro-pneumatic suspension is widely used in engineering dump truck,the ring seal as an important means to generate friction damping has an important influence on hydrocarbon suspension performance. According to the effect of seal ring damping on the characteristics of hydro-pneumatic suspension,the mathematical model of the single air chamber hydro-pneumatic suspension was established. A two degree of freedom quarter vehicle suspension model was built based on the ADAMS,and the mathematical model of the hydraulic system of hydro pneumatic suspension was built based on AMESim. The analysis model of the whole system was established through uniting the above models and the dynamic characteristics of the system were analyzed by using sinusoidal periodic excitation as input. The test platform was set up to analyze the dynamic characteristics of the suspension. Through the comparison of the analysis results,the parameters in the mathematical model were modified to verify the accuracy of the mathematical model. Comparative analysis of the results shows： when sprung mass of hydro-pneumatic suspension changes,compared with the ordinary model,the maximum values of the body acceleration and wheel relative dynamic load in the built model were significantly reduced,which has improved significantly on vehicle ride comfort and operation safety,through considering the seal friction ring and comparison of simulation and experimental results prove the mathematical model of the hydro pneumatic suspension is more accurate to consider the sealing ring friction,which provides a reference for the design of this kind of system.