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以原钢质基座为对象,提出了一种箱型复合材料基座模型,根据该基座的承载应用要求,设计了适用14.7t大载荷加载的基座静/动态特性试验测试方案,针对复合材料基座和原钢质基座开展静刚度试验、空载振级落差试验、加载条件下的频响试验,对比分析了两种基座的静/动态性能。试验结果表明:所设计的复合材料基座的静刚度与原钢质基座相近,在0~1000Hz范围内,横向振级落差提高4.2dB;垂向振级落差提高2.3dB,且复合材料基座具备优异的高频损耗特性。
Based on the original steel base, a box-type composite base model is proposed. According to the bearing application requirements of the base, a test scheme for the static / dynamic test of base applied to 14.7t large load is designed. The static stiffness test, the no-load vibration level drop test and the frequency response test under the loading condition were carried out on the composite base and the original steel base. The static / dynamic performances of the two kinds of base were compared. The experimental results show that the static stiffness of the designed composite foundation is similar to that of the original steel foundation, the lateral vibration amplitude difference increases 4.2dB in the range of 0 ~ 1000Hz and the vertical vibration amplitude increases 2.3dB, and the composite material base Block with excellent high frequency loss characteristics.