金属厚壁结构中深裂纹的重构方法研究  

Study on Reconstruction of a Deep Crack in Metal Structures

作　　者：武美先[1] 张东利 WU Meixian1, ZHANG Dongli2.(1. School of Chemistry and Chemical Engineering, North Minzu University, Yinehuan Ningxia 750021, China; 2. School of Mechanical and Electrical Engineering, North Miazu University, Yinehuan Ningxia 750021, China)

机构地区：[1]北方民族大学化学与化学工程学院,宁夏银川750021 [2]北方民族大学机电工程学院,宁夏银川750021

出　　处：《传感技术学报》2017年第11期1689-1692,共4页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(51667001);宁夏自然科学基金项目(NZ14100);北方民族大学科研项目(2014XYZ07);北方民族大学引进人才项目;国家民委化工技术基础重点实验室一般科研项目(2017HG06)

摘　　要：为了提高涡流方法检测厚壁结构中深裂纹的检测精度,使用三维涡流程序对涡流信号进行了仿真,通过分析传感器布置方案对检测信号及噪声的影响,提出了基于反面涡流检测信号的深裂纹重构策略,并开发了相应的逆问题反演程序,对重构策略的可行性进行了验证。数值仿真结果表明,所提出的基于反面涡流检测信号的深裂纹重构策略,可有效提高厚壁结构中深裂纹的重构精度,并可用于工程实践。To enhance the reconstruction precision of a deep crack in thick structures,influence of the eddy current sensor arrangement on testing signals and noises is studied with a 3D code to get eddy current simulation signals.Based on the comparative analysis of results for the two sensor arrangements,a reconstruction strategy based on signals of an outside crack is proposed and a reconstruction code for the inverse problem is also developed. Its effectiveness is confirmed by simulation. Results shown that,reconstruction precision of deep cracks could be enhanced by using the strategy and could be applied to the engineering practice.

关 键 词：厚壁结构 深裂纹重构 涡流传感器 数值仿真 

分 类 号：TB971[一般工业技术—计量学]