中国电机工程学报Issue(3)：495-502,8.DOI:10.13334/j.0258-8013.pcsee.2014.03.022
花萼状涡流阵列传感器裂纹扰动半解析模型构建
Semi-analytical Crack Perturbation Model Construction of Rosette Eddy Current Sensors
摘要
Abstract
To monitor the crack damage located at the bolt hole of the metallic bolted-joint structure, based on the Ref. 18, the paper proposed a kind of rosette eddy current sensor with planar and flexible characteristics. Semi-analytical crack perturbation model of rosette eddy current sensors was constructed, and perturbation voltages of sensing channels under the three-dimension structural crack were obtained. Experiments were carried out to validate the model. During the model formulation, the surfaces of the three-dimension structural crack were meshed, and free charge density of each meshed cell center was defined as unknown parameter. According to the boundary condition of free charge and perturbation model assumption, the linear equations containing all unknown parameters were built, and the distribution of free charge density around the structural crack could be acquired via solving linear equations. The crack growth simulation experimental results show that perturbation models of 2A12-T4 aluminum alloy and stainless steel agree relatively well with experiment result under 3MHz and 6MHz stimulation frequencies, and perturbation model errors of four sensing channels are within 25 percent.关键词
花萼状涡流传感器/裂纹监测/扰动假设/半解析/自由电荷密度Key words
rosette eddy current sensor/crack monitoring/perturbation assumption/semi-analytical/free charge density分类
信息技术与安全科学引用本文复制引用
丁华,焦胜博,何宇廷,侯波,崔荣洪..花萼状涡流阵列传感器裂纹扰动半解析模型构建[J].中国电机工程学报,2014,(3):495-502,8.基金项目
国家863高技术基金项目(2009AA04Z406)；国家自然科学基金项目(51201182)。The National High Technology Research and Development of China 863 Program (2009AA04Z406) （2009AA04Z406）
Project Supported by National Natural Science Foundation of China (51201182) （51201182）
