关键词: 振动与波, 隔振系统, 隔振器, 基础运动, 振动响应

Abstract:

Aiming at an off-center airborne equipment, each mount load was calculated by load decoupling and the nature frequency of the system was calculated, as well as stiffness and damping. The finite element model was established in which the isolators were instead of linear spring dashpot elements. The acceleration response of the isolation system was analyzed by base motion method. At last, according to test results, parameter optimization method was used to modify the stiffness and damping of the isolator of the finite element model. After optimization, the error of the acceleration response of the Y direction of the system decreases from 44.95% to 7.47%; the error of the nature frequency decreases from 37.43% to -0.25%. And the error of the other two directions decrease evidently and an accurate dynamic model of the system was gained. It provides an analysis method for an off-center airborne equipment isolation design under random vibration.