Bolt fastening force ultrasonic detection and key detection parameter determination method based on finite elements

• Main Authors: LIU XIAOHAO, SONG WEI, PAN RUIPENG, PAN QINXUE, SHAO CHANG
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2018
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The invention provides a bolt fastening force ultrasonic detection and key detection parameter determination method based on finite elements. The method is suitable for bolting force ultrasonic soundtime nondestructive measurement. The finite element theory and the acoustic elasticity principle are combined, and a bolt fastening force ultrasonic detection principle model is established. A bolt finite element model and a static simulation are established, the bolt axial stress distribution rule on the ultrasonic propagation path is obtained, so that the shape factor of the bolt is determined.The ultrasonic detection coefficient of the bolt fastening force is calculated by combining the acoustic elasticity coefficient of the bolt material measured by the critical refraction longitudinal wave. The method is low in cost and good in adaptability, and the detection coefficient can be accurately and quickly determined. 本发明提出了种基于有限元的螺栓紧固力超声检测及关键检测参数确定方法，该方法适用于螺栓紧固力超声声时法无损测量。将有限元理论和声弹性原理相结合，建立螺栓紧固力超声检测原理模型。通过建立螺栓有限元模型