In view of the influence of geometric and material factors on the accuracy of bolt preload in-situ measurement of ultrasonic longitudi-nal and transverse waves,it proposes an ultrasonic in-situ measurement model of bolt preload based on form factor and material factor through theoretical derivation of acoustic elasticity,and tests the influence of form factor and material factor of bolts of various specifications,grades and manufacturers.The results show that this measurement method has a high degree of fit,and can reduce the form factor λ＜0.3 as appli-cable conditions.It is concluded that the correctness of theoretical derivation is verified through measurement,and the influence range of vari-ous factors on measurement accuracy is quantitatively obtained,which provides a solid foundation for establishing a virtual calibration curve al-gorithm and database for longitudinal and transverse waves.
关键词
超声纵横波原位法/材料因子/螺栓预紧力/声弹力学理论
Key words
ultrasonic longitudinal and transverse wave in situ method/material factor/bolt preload/acoustic elastic mechanics theory
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