The effect of pretightening force on the stress of hole ' s edge of point - support glass is analysed and researched in the article , and the valuable laws and conclusions are educed 在本文中，把紧固件预紧力对孔边应力的影响做了较深入的分析和研究，得出很有实用价值的规律和结论。
The results show that decreasing the driving voltage , primitive cavity , pre - tightness force of spring , and the mass of mobile elements can improve the performance of solenoid 通过降低驱动电压，减小初始气隙，降低弹簧预紧力，减轻电磁阀运动部件的质量，均可以提高电磁阀的性能。
In this paper the author describes a way of determining the residual pre - tightening force after adding elastic elements to the connecting bolt at the flange on ball mill ' s shell and therefore a formula is induced 阐迷了球磨机筒体法兰联接螺栓增加弹性元件后其剩余预紧力的确定方法，并导出了相应的计算公式。
According to the analysis of the table lookup , the graph method and the simulating formula method of selecting bolt diameter without controlling pretightening force under dead load were presented in this paper 摘要通过对查表法资料进行分析，提出了静载时选择不控制预紧力的紧螺栓联接螺栓直径的图线法和模拟公式法。
Chapter three makes clear the importance of preload , and deals with the theories on the relationship between preload and torque , angle and extension of the bolt from various aspects 第三章由扭矩控制的实质? ?预紧力，点明了预紧力的重要性，预紧力与拧紧力矩、螺母转角、螺栓伸长的关系，对其进行了理论方面的研究和探讨。
Through analysis of performance the steam cylinder , it is believed that the main factors affecting the safe application performance of high temperature bolts are under and non - homogeneous pretightening loads 摘要通过对汽缸结合面高温螺栓的性能试验分析，认为预紧力过大和预紧力不均匀是影响高温螺栓安全使用性能的主要因素。
Finally , the calculation method of the pre - pressures of the springs in the ” unchaining coupling equipment ” is obtained , and the magnitudes of the pre - pressures are calculated out according to the value of the grasping forces got by optimizing process 最后获取了“解藕装直”中弹簧预紧力的计算方法，并根据优化所得到的各力佳计算得到了该预紧力的大小。
Abstract : based on the fuzzy mathematics , it establishes the rules of the fuzzy reliability design for the bolt - joint set , discusses the effect of pre - tighten force and the axial changing load on the set , and shows an example 文摘:将模糊数学理论引入可靠性设计中，考虑预紧力和轴向变载荷状态的影响因素，建立螺栓联接的模糊可靠性设计准则，并给出了设计实例。
By adopting the method of coupling analysis , and a comprehensive consideration on composed pressure and affections of pre - tightened radial force and thermal stress , the internal stress field of anvil was obtained and the damage mechanism was expounded 采用耦合分析方法，综合考虑合成压力、径向预紧力和热应力的作用，获得了顶锤内部的应力场，阐述了破坏机理。
And based on these , the view that the optimal installation pretightening force for fastener exists is proposed . additionally , the method for the optimal installation pretension is offered . the conclusions provides practical significance for engineering practice 在此基础上，提出存在最佳安装预紧力的观点，并给出了确定最佳安装预紧力的计算方法，其结论对指导工程实践有重要意义。
