ty -jour a2 -chen，jian au -chen，Qiang au -Zu，Zu，shuai au- che，yinhui au -yinhui au -feng，dongxiong au -li，li，yang py -2021 da -2021/1021/10/04 ti-骨折分析和疲劳强度分析和疲劳强度计算核电厂循环水泵SP -7019861 VL -2021 AB中使用的锚螺栓 - 循环水泵是核电厂冷却系统的关键设备。在相同类型的泵的入口环处折断了几个锚螺栓。这些螺栓是用一种特殊的海水腐蚀保护材料转动的。线的根部有明显的转动工具标记，这被认为是裂纹的来源。疲劳裂纹延伸至螺栓的深度，在断裂表面引起明显的辐射条纹，这是典型的疲劳裂缝。在断裂的螺栓头部发现了明显的过度特征。断裂和能量谱分析表明，螺栓未腐蚀。测量泵的轴向振动。沿螺栓轴沿螺栓轴，轴向振动引起的轴向拉伸应力和扭转应力分别计算，分别计算了静态拉伸应力。 According to the fatigue strength theory, the composite safety factor of the bolt fatigue strength was 1.37 when overtightening at 1.2 times the design torque, which was less than the allowable safety factor of 1.5-1.8, so the bolt was not safe, which further verified the conclusion of fracture analysis. The reason for the low safety factor was caused by the overtightening force. The improvement method was to control the bolt preload or increasing the bolt diameter. SN - 0161-0457 UR - https://doi.org/10.1155/2021/7019861 DO - 10.1155/2021/7019861 JF - Scanning PB - Hindawi KW - ER -