论文部分内容阅读
掘进机的截割部在复杂多变的煤岩地质条件下工作,其工作过程中截割头与坚硬的煤岩碰撞,受到冲击载荷,容易出现疲劳损伤导致截齿断裂,影响截割部的工作效能,通过有限元软件ANSYS对截割部的动态特性进行研究,揭示了截割部在工作过程中的振型结构特性,同时采取重点部位细化网格以及非重点部位粗化网格的混合计算方式,保证了可靠度分析结果的准确性。
The cutting machine of tunnel boring machine works under the complex and changeable geological conditions of coal and rock. During the working process, the cutting head collides with the hard coal and rock and is subjected to the impact load, and the fatigue damage easily leads to the cutting of the cutting tooth, affecting the cutting part The author studies the dynamic characteristics of the cutting part through the finite element software ANSYS and reveals the mode shape characteristics of the cutting part during the working process. At the same time, the fine mesh of the key part and the coarse mesh of the non-key part Mixed calculation to ensure the accuracy of the reliability analysis results.