Calculation and simulation research on leakage magnetic field of broken wire damage of wire rope
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摘要: 针对钢丝绳缺陷状态及特征具有随机性、对不同形态损伤进行物理计算难度太大等问题，采用二维磁荷模型对钢丝绳断丝漏磁场进行分析，得出钢丝绳断丝轴向漏磁场计算公式与磁场分布形态；通过Ansoft Maxwell软件对钢丝绳断丝轴向漏磁场进行有限元仿真分析，以验证基于磁荷模型的理论分析结果的正确性。分析结果表明：用2种方法得出的漏磁强度变化大体一致，能反映单根断丝钢丝绳轴向漏磁分量的变化规律；在一定范围内，随着断口宽度增加，缺陷轴向漏磁强度呈现非线性减小的变化趋势，并且单一峰值逐渐分化为2个峰值。Abstract: In view of problems that states and characteristics of wire rope defects are random, and it is too difficult to physically calculate the damage of different forms of wire rope, two-dimensional magnetic load model is used to analyze leakage magnetic field of broken wire damage of wire rope, and calculation formula and magnetic field distribution of axial leakage magnetic field are obtained. The finite element simulation analysis of the axial leakage magnetic field of broken wire of wire rope is carried out by Ansoft Maxwell software to verify the correctness of the theoretical analysis result based on the magnetic charge model. The analysis results show that the magnetic flux leakage intensity changes obtained by the two methods are roughly the same, which can reflect the change law of axial flux leakage component of a single wire rope; within a certain range, as the fracture width increases, the axial flux leakage intensity of defects presents a nonlinear decreasing trend, and a single peak gradually differentiates into two peaks.
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