金属塑料复合材料的减振性能模态试验分析研究

Modal Testing and Analysis of Vibration Reduction Behavior of Metal-plastic Compound Materials

为满足工业上对减振材料的需求，制备了一种以45#钢和尼龙66为主要成分的金属塑料复合材料。对此复合材料进行模态试验，测试其在受迫振动条件下的响应频率与阻尼比，有助于认识其阻尼减振行为，为进一步推动其在工程中的应用奠定基础。试验结果表明：与对比材料相比，复合材料在相同阶模态条件下，振幅降低17％～28％，固有频率下降，阻尼比显著提高，减振效果明显。

In order to satisfy the requirement of damping material in industry, a kind of metal-plastic compound material made of 45# steel and PA66 nylon is fabricated. Modal test is carried out for this kind of material. The frequency response and damping ratio of the compound material in forced vibration are tested. Its damping behavior is analyzed. The results show that under the same order of vibration mode, the amplitude of compound materials is 17% -28% lower than that of the comparative material, the natural frequency of the compound materials decreases rapidly, and the damping ratio increases obviously. Thus, the damping effect of compound materials is improved greatly.