关键词: 隔振装置, 扩展谐波平衡法, 有限元, 机械阻抗, 力传递率

Abstract: To meet the requirements for multi-directional loads and multi-environmental vibrations and noise reduction in marine ship equipment, an all-metal flexible multi-directional isolation device was designed based on the flexibility and compactness of spherical hinge structure. The influences of constitutive parameter evolution on the dynamic response was systematically analyzed based on a nonlinear dynamic theoretical model and a finite element simulation model. Vibration isolation performance of the devices was quantitatively evaluated by sinusoidal frequency sweep tests, and impedance and force transmissibility as characterization metrics. The accuracy of the theoretical and simulation models was validated by the acceleration frequency response results collected in the experiments. The results indicate that the device exhibits excellent vibration isolation performance, while the force transmissibility reduces to 0.01, and the theoretical predictions, simulation outcomes, and experimental results show a high level agreement.

Key words:  isolation device, extended harmonic balance method, finite element, mechanical impedance, force transmission rate