Dimension Design of Excitation Structure for Wire Rope Nondestructive Testing

Abstract:

Wire rope nondestructive testing excitation structure model is established according to the characters of wire rope defect. The value of magnetization intensity was determined by the influence of magnetization intensity to localized fault (LF) and loss of metallic cross sectional area (LMA) defection signals. Meanwhile, whether the rope can be magnetized to a certain degree was regarded as a standard for a rational design judgement. Based on the equivalent circuit model of excitation structure, parameters of excitation structure size were obtained, and then an analysis was made of the impacts of the excitation structure size variation to excitation, as a result, the size of the excitation structure was obtained. A simulation of the excitation structure of finite element by ANSYS shows that there is a gap between the theoretical calculation dimension and the magnetized intensity, an ideal value of intensity can be achieved by adjusting the key dimension values, and the last dimension values provide a reference for the excitation structure dimension design.