Abstract
With the intention of reducing the vibration and noise of a ship pump group, rubber dampers were installed between the motor base and the foundation. The finite element analysis method was used to analysing the influence of the stiffness of the rubber damper on the damping effect. It was found that the rubber shock absorber significantly reduces the low-order modal frequency of the group. When the structure has good symmetry, the frequency of the translational mode is proportional to the square root of the stiffness of the rubber damper in the corresponding direction. And some impedance characteristics of the pump group were obtained by harmonic response analysis, which are beneficial to pick the right rubber damper to avoid the modal resonance frequency.
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