The tensile load of preloaded bolt, often a fraction of external load, could be determined according to the static equilibrium and deflection coordination between the bolt and the clamped parts.

• 摘要预紧螺栓所受拉力可根据力平衡和螺栓与被联接零件间的变形协调条件确定，其大小变化量为外加载荷变化量的几分之一。