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螺栓连接的应力监测是评估机械系统结构健康的关键，基于渡越时间的超声测量方法在这一领域具有广阔的应用前景；然而，耦合层的流动性会显著降低超声方法的鲁棒性。因此，该文提出了一种基于耦合误差补偿的螺栓轴向应力接触式超声测量方法。首先根据声弹性理论，考虑耦合剂的流动性，建立耦合误差补偿模型，分析耦合剂厚度对模型的影响。同时通过有限元仿真验证该方法的有效性，结果与推导结果一致。最后，利用搭建的测量实验平台对该方法进行实验验证。结果表明，采用该方法进行补偿后，应力测量误差保持在5%以内，对提高螺栓轴向应力超声测量方法的实用性具有参考价值。
Abstract：The stress monitoring of bolted joints is the key to evaluate the structural health of mechanical systems, and the transit-time based ultrasonic measurement method has broad application prospects in this field. However, the fluidity of the coupling layer can significantly reduce the robustness of the ultrasonic method. A contact ultrasonic measurement method of bolt axial stress based on coupling error compensation is proposed in this paper. Firstly, a coupling error compensation model is established acording to the acoustoelastic theory, considering the fluidity of the coupler, and the influence of the coupling thickness on the model is analyzed. At the same time, the effectiveness of the proposed method is verified by finite element simulation, and the results are consistent with the derived results. Finally, the proposed method is verified by an experimental platform. The results show that the stress measurement error is kept within 5% after compensation by this method, which is of great significance to improve the practicability of ultrasonic measurement of bolt axial stress.
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基本信息:
中图分类号:TG115.285
引用信息:
[1]何宇琪,张波,谭红,等.耦合误差补偿的螺栓轴向应力接触式超声测量方法[J].中国测试,2026,52(03):17-24.
基金信息:
国家自然科学基金项目资助（62071123）
2024-10-08
2024-10-08
2024-10-08