Study on Vibration Reduction Indicator of Metal Bellows Using Finite Element Analysis

摘要

In this paper, the vibration reduction indicator of metal bellows is researched, and the main influencing factors in its practical application are analyzed. Through numerical simulation and analysis, the vibration reduction indicator of metal bellows under multi-frequency is studied. And the influence of exciting frequency on the vibration reduction indicator of metal bellows is analyzed. The vibration reduction performance of bellows in resonance and anti-resonance is described in detail. At the same time, the deficiencies of using the acceleration vibration level difference to evaluate the vibration reduction performance are analyzed. The exciting point amplitude and the vibration level difference are proposed as a method to evaluate the vibration reduction indicator of the metal bellows. Based on this, changing the wave number and wave distance of metal bellows, the influence of metal bellows structure change on the vibration reduction indicator is studied. And the relationship between the thickness of the damping layer and the vibration reduction indicator of the multi-layer bellows is studied. The variation of the vibration reduction indicator of the multilayer bellows with the thickness of the damping layer is obtained. The main conclusion can be described as: on the premise of meeting the bearing capacity, fatigue strength and stability of bellows, improving the displacement compensation capacity and damping layer thickness is conducive to enhancing the vibration reduction performance. In conclusion, through the research and calculation of metal bellows vibration reduction indicator, structure and damping layer thickness, this paper provides a theoretical basis for the analysis and optimization design of metal bellows vibration reduction indicator .