Thermal analysis of vehicular twin-tube hydraulic gas-precharged shock absorbers

In this study of temperature rising in vehicular twin-tube hydraulic gas-precharged shock absorbers, thermodynamic analyses were conducted via simulations. Equations on heat conduction, heat convection as well as radiation were derived by applying certain laws governing heat transfer; an equivalent thermal resistance network model of a shock absorber undergoing heat transfer was established innovatively; moreover, the shock absorber's thermodynamic model of control volume system was built by using the first law of thermodynamics; and finally, time required for shock absorber to reach thermal equilibrium and corresponding value of steady temperature were calculated by programming. In this way, a lower thermal equilibrium temperature will be achieved, hence help to improve reliability of shock absorbers in work by offering low ambient temperature, by reducing amplitudes and frequencies of external incentives exerted on them and by increasing flow rate of ambient air passing around them.