基于磁谐振的预应力钢绞线交变应力监测试验研究

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摘要预应力钢绞线的交变应力难以测量。为明确磁谐振方法对预应力钢绞线交变应力监测的适用性，基于磁弹效应和磁滞效应，分析了应力交替过程中拉伸应变效应的感应线圈电感变化，开展了交变荷载作用下的钢绞线应力监测试验。研究了不同交变荷载作用下传感器感应电压的变化规律，明晰了传感器感应电压与交变荷载的对应关系，揭示了交变荷载对传感器感应电压的影响机制。结果表明，交变荷载作用下的感应电压与荷载之间存在线性函数关系，其交变应力监测误差小于5%，磁谐振方法可以监测预应力钢绞线的交变应力。

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	刘惠玲1
	2
	张洪1
	2
	张森华1
	2
	夏俊凤1
	2
	周建庭1
	2

关键词 ：交变应力, 预应力钢绞线, 磁谐振, 磁弹效应, 监测

Abstract：The alternating stress of the prestressed steel strand is difficult to measure. In order to clarify the applicability of magnetic resonance method for monitoring the alternating stress of prestressed steel strand, based on the magnetoelastic effect and hysteresis effect, the inductance variation of induction coil induced by tensile strain effect during stress alternation is analyzed, and the steel stranded wire stress monitoring test under the action of the alternation load was carried out. Changes of corresponding sensor induced voltages under different alternating load is researched, the corresponding relationship between the sensor induced voltages and the alternation load is clarified, and the influence mechanism of the alternation load on the sensor induced voltages is revealed. The results show that there is a linear relationship between induced voltage and load, and the stress monitoring error is less than 5%. The magnetic resonance method can monitor the alternating stress of prestressed steel strands.

Key words： alternating stress prestressed steel strand magnetic resonance magnetoelastic effect monitoring

收稿日期: 2022-07-11 出版日期: 2023-07-28

引用本文:

刘惠玲1,2，张洪1,2，张森华1,2，夏俊凤1,2，周建庭1,2. 基于磁谐振的预应力钢绞线交变应力监测试验研究[J]. 振动与冲击, 2023, 42(14): 189-197.
LIU Huiling1,2,ZHANG Hong1,2,ZHANG Senhua1,2,XIA Junfeng1,2,ZHOU Jianting1,2. Experimental research on monitoring the alternating stress of the prestressed steel strand based on the method of magnetic resonance. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(14): 189-197.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I14/189

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