Ride comfort analysis of interconnected hydro-pneumatic suspension system of mine wide-body vehicle
It is difficult to obtain good ride comfort for mine wide-body vehicle with leaf spring suspension.Therefore,an interconnected hydro-pneumatic suspension system with adjustable stiffness and damping was proposed.Firstly,the working principle of interconnected hydro-pneumatic suspension system was described.And the mathematical model of hydro-pneumatic suspension system was established.Then,the simulation model of interconnected hydro-pneumatic suspension system and leaf spring suspension was built by AMESim software.The main parameters of the simulation model were determined.Finally,under D-class random road excitation,the simulation study on vehicle ride comfort under uniform speed and acceleration-braking conditions was carried out.And the simulation results were analyzed.The research results indicate that compared with the leaf spring suspension,under the empty load condition of uniform speed and acceleration-braking,the root mean square of body acceleration of the interconnected hydro-pneumatic suspension system is respectively decreased by 38.7% and38.8% .The root mean square of the wheel dynamic load is respectively increased by 3.1% and 0.5% and grounding of the wheel is not affected.The root mean square of suspension dynamic deflection is respectively increased by 41.6% and 39.7% .The probability of suspension hitting the limit block is less than 0.1%,meeting the design requirements.Under the full load conditions of uniform speed and acceleration-braking,the three ride comfort evaluation indexes of body acceleration,wheel dynamic load and suspension dynamic deflection of the interconnected hydro-pneumatic suspension system are improved.The results show that the interconnected hydro-pneumatic suspension system can improve ride comfort of the vehicle,which can provide a reference for the design of hydro-pneumatic suspension system for mine wide-body vehicle.
leaf spring suspensionvehicle ride comforthydro-pneumatic suspension mathematical modelstiffness and dampingD-class random roaduniform working conditionacceleration-braking condition