Whole-cabin vibration absorbing device without resonance peak

Abstract

The invention discloses a whole-cabin vibration absorbing device without a resonance peak. The whole-cabin vibration absorbing device without the resonance peak comprises a bearing mechanism and a vibration absorbing mechanism; the bearing mechanism is fixedly connected with a tank plating bracket through at least one vibration absorbing mechanism so that the vibration amplification multiple within a concerned frequency band range of 5-2000 Hz is not more than 1; a heating element is mounted outside the bearing mechanism; a temperature homogenized heat tube is mounted in the bearing mechanism;at least one heat tube is placed in the bearing mechanism so that temperature differences of different positions of the bearing mechanism are less than 5 degrees centigrade; the vibration absorbing mechanism comprises a shell and an internal vibration absorbing element; the mounting direction of the vibration absorbing element is consistent with a direction in which the vibration is to be absorbed; and high frequency overall mean square root acceleration of a characteristic point on the bearing mechanism is not more than 10 grms. According to the whole-cabin vibration absorbing device withoutthe resonance peak, the highlighted vibration amplification multiple within the concerned frequency band range of 5-2000 Hz is not more than 1, the whole-cabin vibration absorbing device without theresonance peak is conducive to realizing whole-cabin vibration absorbing of a cabin section layer, improving the comfort of a single machine mechanical environment and reducing the types, number and weights of single machine vibration absorbers.

Description

technical field [0001] The invention relates to a whole-cabin vibration reduction device without a resonance peak, and belongs to the technical field of whole-star vibration reduction. Background technique [0002] When the active stage of the rocket is flying, due to the influence of engine thrust changes, inter-stage separation, engine noise in the take-off stage, transonic velocity, and pulsating pressure and aerodynamic noise in the maximum dynamic pressure stage, the upper stage and the satellite are subjected to different magnitudes of 5-100Hz sinusoidal noise. Scan vibration, 20~2000Hz random vibration environment. For the launch vehicle, in order to avoid damage or abnormal function of the important stand-alone aircraft in the harsh environment, the single-engine external vibration reduction mechanism scheme (single-machine vibration reduction) can be adopted. When the number of single-machine vibration reduction is large, the type and An increase in the number is n...

AI Technical Summary

Problems solved by technology

On the one hand, the external excitation frequency band during the flight is wide, and the frequency and magnitude of occurrence are relatively random. On the other hand, when the acceleration response at a lower frequency is large, the corresponding displacement value and stress are also large, which is not conducive to flight safety.

Therefore, this method has certain limitations

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