The Ultrasonic Measurement of Bolt Stress
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摘要: 采用超声波法测量了螺栓应力,理论推导得出超声波声时差与应力之间的线性关系。通过制动器螺栓的声时差-应力关系的标定试验,可得到同型号螺栓的材料系数。提出在线实时检测风电机组螺栓轴向应力的方法,通过远程上位机操作界面可实现人机对话,完成螺栓应力从检测到预警的整个过程。Abstract: The ultrasonic wave was used to detect the bolt stress, and the linear relationship between the ultrasonic time difference and the stress was deduced theoretically. Through the calibration test of the relationship between acoustic time difference and stress of brake bolts, the material coefficients of the same type of bolts can be obtained. The method of on-line and real-time detection of bolt axial stress in wind turbine is proposed, and the man-machine dialogue is realized through the remote upper computer design operation interface, and the whole process of bolt stress detection and warning is completed.
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Keywords:
- acoustic elasticity theory /
- bolt stress /
- ultrasonic transducer /
- remote monitoring
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[1] 刘镇清. 螺栓轴向紧固力的超声测量[J]. 固体火箭技术,1996,19(1):75-78. [2] 张俊. 基于声弹性原理的超声波螺栓紧固力测量技术研究[D].杭州:浙江大学, 2005. [3] 刘镇清,王路. 用超声波技术测量螺栓轴向紧固应力[J]. 测试技术学报,1997,11(1):32-37. [4] 刘艳平,王寅观. 数字实时脉冲回波法声速测量系统的研制[J]. 无损检测, 2008,30(12):953-954.
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