第二，电潜泵各管螺纹联接的预紧力不够（或预紧扭矩不够）。
首先，求解出从试验台采集到的各锚固螺杆不同已知紧固力矩下振动信号的脉冲响应信号；
应用螺栓-垫圈应力理论对FRP结构搭接点预紧力进行了研究。
采用螺旋副预紧力调整装置，可以对阀芯运动机构施加可调的预紧力。
1·The calculation method for bolt pretightening force of tube side gasket and shell side gasket was proposed.
提出了管侧垫片和壳侧垫片螺栓预紧力的计算方法。
2·Accurately measuring the injection pump corrector's pretightening force and correction stroke has very important theoretic and practical significance.
精确测定喷油泵校正器的预紧力和校正行程，具有重要的理论和现实意义。
3·The calculation method for bolt pretightening force of tube side gasket and shell side gasket were proposed.
给出了管程和壳程垫片螺栓预紧力的计算方法。
4·The utility model relates to machinery driving field, in particular to an adjusting mechanism which can adjust pretightening force between an adjusting shaft and a bearing.
本实用新型涉及机械传动领域，尤其是指一种用于调节轴与轴承间的预紧力的调节机构。