Research on Weight Optimization of Fluidlastic Isolator of Helicopter Main Reduction Based on Isight Platform

As a vibration isolation device that can effectively isolate the exciting force transmitted from the rotor to the fuselage, the fluidlastic isolator is generally installed in the transmission channel of the main reduction, which puts forward strict requirements for the structural size and weight design of the fluidlatic isolator. In this paper, a structural weight optimization analysis method based on Isight platform is proposed, and a single objective optimization model of structural weight is established by integrating the self-made weight analysis program of fluidlastic isolator. The model takes the structural size of the key position of the vibration isolator as the design variables, taking the minimum weight of the whole vibration isolator as the goal, and taking the dynamic stiffness, vibration isolation efficiency, length and frequency of the vibration isolator as the constraints, which is solved by the pointer all-round optimizer to realize the weight optimization design of the vibration isolator. After optimization, the overall structure of the vibration isolator is more compact and the weight is reduced by 12.5%. The results show that a fast and effective optimization system is formed by integrating the structural weight analysis program through the Isight optimization platform, which has guiding significance for the structural design of fluidlastic isolator.