Research on the Influence of Temperature on the Characteristics of Hydro-Pneumatic Suspension
In view of the problem that the temperature of the hydro-pneumatic suspension will inevitably rise after long-term op-eration,the gas in the accumulator is greatly affected by the temperature,which affects the working characteristics of the hydro-pneumatic suspension,considering the sealing friction,based on the theory of thermodynamics and fluid mechanics,the hydro-pneumatic suspension is established Mathematical model,mathematical model simulation in Simulink.A virtual model is built in AMESim simulation software.Bench tests were carried out on the hydro-pneumatic suspension at different working tempera-tures,and the working characteristic curves of the hydro-pneumatic suspension at different temperatures were obtained.The simulation results were compared with the test results to verify the correctness of the hydro-pneumatic suspension mathematical model and the AMESim virtual model.The test results at different temperatures were compared,and the influence of temperature rise on the stiffness and damping characteristics of the hydro-pneumatic spring was explored.The results show that with the in-crease of temperature,the stiffness characteristics of the hydro-pneumatic suspension change greatly,and the damping charac-teristics change less.
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