动力系统的理论频谱图和弹(箭)体的消谐减振

THE THEORETCAL FREQUENCY SPECTRUM FOR PROPULSION SYSTEM AND THE HARMONIC ELIMINATION TO MISSILE OR LAUNCH VEHICLE BODY FOR MINIMIZING VIBRATION

指出导弹武器以及运载火箭的动力系统是弹体结构和有效载荷所必需承受的强迫振动的振动源。用求解动力系统全系统动力学方程组的方法,首次提出动力系统强迫振动源按逐个飞行秒得出的理论频谱图,这些频谱图与发动机试车中试车台系统测试有着惊人的一致性,也与飞行遥测数据有很好的一致性。显然,所提出的动力系统强迫振动理论频谱图对导弹和卫星运载工具内部振动接口将发挥它的重要作用。

It is pointed out that the propulsion system must be the most important one of the vibration sources of missile or satellite lauch vehicle structure body with payload.Theoretical forced vibration frequency spectrum VS.flight thme of the launch vehicle is derived first time by using the dynamic equations of whole propulsion system.Some important data from the obtained theoretical frequency spectrum figues are surpris- ingly in accordance with the engine hot fire test results,and are well consistent with the flight telemetry data also.