舰船隔振器安装参数与隔振效果相关性试验研究

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

开展舰船隔振器安装参数与隔振效果相关性试验研究可为隔振器建造声学质量检测提供重要支撑。以典型船用隔振器为研究对象,首先梳理出舰船建造过程中对隔振器隔振效果影响较为显著的安装参数,接着通过系列化的工艺试验分析隔振器紧固力矩和安装面间隙对隔振效果的影响规律。在大量实船测试数据的基础上,基于多元统计分析得到了典型隔振器各安装工艺参数对隔振效果的贡献量。结果表明:BE300型隔振器隔振效果与预紧力矩、底面贴合间隙呈现复杂的变化规律,建议去除底面橡胶并选取适当预紧力矩进行安装;隔振效果与隔振器下水后变形量、连接管路后变形量、垫片厚度在多个1/3倍频程中心频率处呈现强相关性。

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.