一、前言防止螺栓松弛的方法,包括双螺母,过去已有多种。但是,这些方法的效果至今还没有搞清楚。另外,螺栓松弛的试验方法,在国际上也没有统一的规定。在这种情况下,最简单的方法,是对紧固好的螺栓沿垂直于螺杆的方向反复冲击,试验各种弹簧垫圈防止螺栓松弛的效果。二、试验方法 I. Preface Preventing bolt loosening methods, including double nuts, has been around in the past. However, the effectiveness of these methods has not yet been clarified. In addition, the bolt loose test methods, there is no uniform international regulations. In this case, the simplest method is to repeatedly tighten the fastened bolt in a direction perpendicular to the screw, and test various spring washers to prevent the bolt from slackening. Second, the test method