基于超声双波法的螺栓紧固力在线测量

Online measurement of bolt tightening force based on ultrasonic dual-wave method

为了保证螺栓处于稳定的连接状态,螺栓上需要施加一定大小的紧固力。现阶段,在役螺栓紧固力的测量仍是一个技术难题。提出了利用超声横波、纵波的双波声时比值法测量螺栓紧固力,并进行了测量验证,结果表明:双波法有较高的检测精度。研究了影响双波法测试精度的因素,提出了温度修正系数以补偿温度对螺栓紧固力测量的影响。该方法实现了在役螺栓紧固力的测量,具有较高的工程应用价值。

To ensure the stability of the bolt connection,a certain tightening force is required on the bolt.Currently,the measurement of the tightening force of in-service bolts remains a technical challenge.This paper proposed a method to measure bolt tightening force using the ratio of ultrasound transverse and longitudinal waves,and verified through measurement,with the results showing high detection accuracy for the double-wave method.Studied the factors affecting the accuracy of the double-wave method,a temperature correction coefficient was proposed to compensate for the influence of temperature on the measurement of bolt tightening force.This method has high engineering application value in measuring the tightening force of in-service bolts.