Tests for correlation between ship vibration isolator installation parameters and vibration isolation effect

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (19) : 118-123.

JI Fang1, ZHANG Huadong1,2,LI Guonan1,3,WU Ming1

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Abstract

Tests for the correlation between ship vibration isolator installation parameters and vibration isolation effect are a key to support vibration isolator acoustic quality measuring.Here, typical ship vibration isolators were taken as a study object, their installation parameters being sensitive to vibration isolation effect in ship building process were found.Furthermore, the influence laws of vibration isolator’s mounting surface clearance and pre-tightening moment on vibration isolation effect were analyzed through series of process tests.Based on a great amount of actual ships test data, each installation parameter’s contribution to vibration isolation effect was obtained based on the multi-variate statistical analysis.The results showed that the BE300 vibration isolator’s vibration isolation effect is complexly related to its pre-tightening moment and bottom bonding clearance; its installation after removing bottom rubber and choosing proper pre-tightening moment is suggested; its vibration isolation effect is strongly correlated to its underwater deformation, its deformation after connecting pipes and gasket thickness at central frequencies of several 1/3 octave paths.

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JI Fang1, ZHANG Huadong1,2,LI Guonan1,3,WU Ming1. Tests for correlation between ship vibration isolator installation parameters and vibration isolation effect[J]. Journal of Vibration and Shock, 2018, 37(19): 118-123

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