The coal crusher generates large vibrations when crushing coal blocks, which can affect the equipment itself, as well as the safety of the structure. In order to study the dynamic characteristics of coal crusher, a finite element model of the coal crusher chamber in the Shangluo power plant was built by using ABAQUS. Firstly, modal and harmonic response analyses were conducted, and the comparison shows that the numerical results are basically in accordance with the test results. Then, shock absorption research was performed using a parametric analysis that included the stiffness and position of the spring vibration isolator, the mass, and material of the vibration-isolation platform. Finally, the dynamic coefficient of a coal crusher was discussed. The results showed that, compared with the stiffness of the spring vibration isolator, the mass of the vibration-isolation platform had more influence on the vibration displacement of the coal crusher. To achieve better vibration isolation, the concrete platform is suggested, and the eccentricity of the spring vibration isolator should not exceed 5%. When static design method is adopted to calculate the bearing capacity of the supporting structure subjected to the dynamic load of the coal crusher, the dynamic coefficient of a coal crusher is suggested as 1.5.

中文翻译：

---

火力发电厂碎煤机腔室的振动测试与减震研究（二）：数值分析

煤破碎机在破碎煤块时会产生很大的振动，这会影响设备本身以及结构的安全性。为了研究破碎机的动力特性，利用ABAQUS建立了商洛电厂破碎机室的有限元模型。首先进行了模态和谐波响应分析，比较表明数值结果与试验结果基本吻合。然后，使用参数分析进行减震研究，包括弹簧隔振器的刚度和位置，隔振平台的质量和材料。最后，讨论了破碎机的动态系数。结果表明，与弹簧隔振器的刚度相比，隔振平台的质量对破碎机的振动位移影响更大。为了获得更好的隔振效果，建议使用混凝土平台，并且弹簧隔振器的偏心率不应超过5％。当采用静态设计方法计算承受破碎机动态载荷的支撑结构的承载力时，建议破碎机的动态系数为1.5。