Based on the explanation of the work principle of pressure-reducing
valve of rocket motor,the computing model of the vibration of the
Heater Gas Valve valve was established not considering the damp effect
of fluid,that is single degree of freedom natural vibration.By using
mutual acting principle of force,the membrane and
heater valve disc acted by
uniform pressure were analyzed separately,the vibration formula of the
motion parts of the pressure-reducing valve was obtained,the computation
formulae of the equivalent stiffness of the membrane acting as
spring,the equivalent single force of the uniform pressure caused by
turbulence,and the natural frequency were derived.Each parameter,which
affects the level of the natural frequency,was analyzed.The derived
computation formula of the natural frequency can be used broadly,it is
more simple,precise than finite element method,and more suitable for
engineering.
