军用车辆悬挂系统热-机耦合特性研究

为解决军用车辆悬挂系统中减振器温升过高而漏油失效的问题,提出了全面的车辆悬挂系统机械动力学与其热学特性相互耦合模型.采用Matlab/Simulink建立此闭环正反馈系统的热机耦合模型,仿真计算得到某军用车辆在多种工况以及不同悬挂参数条件下的减振器温升特性曲线.研究结果表明:随着路面等级的下降,车速的提高,簧下质量和负重轮刚度的增大,减振器的温度升高加快;簧上质量和悬挂刚度对减振器温升特性无影响.

Research on Thermal-Mechanical Coupled Characteristics of Military Vehicle Suspension System

In order to solve the problem of excessive temperature rising of damper in military vehicle suspension system that could lead to oil leakage and finally cause the damper invalidation, a comprehensive model is proposed innovatively in this work. The proposed model includes mechanical dynamics of the vehicle suspension system coupled with its thermal properties. Moreover a thermal-mechanical coupled model was established by using Matlab/Simulink, which reflected the closed-loop positive feedback system. Under the conditions of different suspension parameters and operating modes, the curves to reveal the damper temperature rising characteristics were obtained by simulation and computation. Research results show that: along with the decline of road rank, the more increase of vehicle velocity, unsprung mass or load wheel stiffness, the higher the damper temperature is. Furthermore sprung mass and suspension stiffness have no effect on the damper temperature rising characteristic.