长螺栓 meaning in Chinese

stay bolt
thru-bolt
tie-rod

In the third part , taking advantages of the tests of acceleration , stress and strain , the exciting test , and modal analysis method , it is found out that resonance vibration leads to the compound - bending fatigue fracture of the bolts . accordingly , a series improvement measures are proposed
第三章通过对分动器及长螺栓、短螺栓的加速度、应力应变测试分析实验和激振试验、模态分析研究，确定螺栓断裂问题的根源在于共振响应导致疲劳断裂，并提出了一系列的改进措施。