Optimization Of Load Distribution Of Vibration Isolation System Of Air-spring

Air spring is a kind of excellent vibration isolation component which is widely applied in the machinery fields such as motorcar. However, its application in shipping is not so commonly.In this thesis, the experimental model of an air spring vibration isolation system used on shipboard is studied. At first, theoretic and experimental researches of static and dynamic characteristic of an air spring are conducted, the theoretic model of air spring's air spring is obtained, then the relations between pressure, load and stiffness are gained. Secondly, the FEA of foundation mobility is conducted, then the FEA is applied to calculating the vertical mobility of the foundation of the air spring vibration isolation system, and vertical mechanical mobility matrix of the foundation is obtained. Thirdly, the models of machine's amplitude and performance of vibration isolation are studied by means of the model of air spring's stiffness and mobility matrix of the foundation, the influence of air springs'load distribution to machine's amplitude and performance of vibration isolation is analyzed. Lastly, the optimization of system which aimed at the minimal machine's amplitude, the best performance of vibration isolation and the minimal variance of air springs'load is done.