Vibration Isolation Characteristics Of Euler Strut Spring Used In Low Frequency Vibration Isolation System

Along with the research and development of the marine gradually thorough, precisionmeasuring instruments and experimental instrument is arranged in various types ofoceanographic survey ship and special operation ship. But usually the ship and oceanplatform in the complicated sea environment, harsh and complex environment loads andthe broadband vibration of the ship pose a serious challenge to the normal use ofShipborne precision instruments. Therefore it is important to design the vibration isolatorwhich has broadband frequency isolation effect of vibration isolation system whichequipped in the ship and other ocean engineering structures on the precision measurementsystem. Euler struct isolation mechanisms with a high-static-low-dynamic-stiffness canmeet the requirement of static loading as well as achieve low frequency vibrationisolation.The main work of the thesis is as follows:Firstly, the static and dynamic mechanical model of curved rods under two differentboundary conditions is established. Then researching the characteristics of the two kindsof Euler springs, discussesing the relationship between the structure parameters、boundaryconditions and the stiffness characteristics、natural frequency of vibration isolation system.Then, analyzing the characteristics of simply-supported Euler spring vibration isolator,using the shooting method to calculate the numerical results under the forced vibration,discussesing the relationship between structure parameters, initial load and naturalfrequency, useing the curve of displacement transmissibility and force transmissibility toanalyse and evaluation the effective of the vibration isolation system. It shows that theEuler spring vibration isolation system has good effect of low-frequency vibrationisolationFinally, establishing the dynamics mechanical model of Euler springs vibration isolationsystem, analyzing vibration characteristics of the symmetric plate vibration isolation system and the eccentric plate vibration system. In order to eliminate the system rotationand vibration instability, puting forward the improvement scheme of the eccentric plateisolation system.At the end of the thesis, author gave a summary of the whole work and proposed thefurther work.