不锈钢波纹管检测换能器的设计与应用研究  

Design and application investigation of ultrasonic transducer for the use of defect detection in stainless steel helical bellows

作　　者：赵继辰[1] 吴斌[1] 何存富[1] 

机构地区：[1]北京工业大学机械工程及应用电子技术学院,北京100124

出　　处：《声学学报》2014年第2期251-256,共6页Acta Acustica

基　　金：国家自然科学基金重点项目(11132002);国家自然科学基金(10972014);北京市教委项目(YB20091000502;PHR200906105)资助

摘　　要：研制了一种用于不锈钢波纹管检测的磁致伸缩换能器。首先选用多物理场耦合分析软件对圆管的磁场分布规律进行有限元仿真,证实增加铁磁性条带后,磁场强度显著提高。而后通过均匀包裹一层镍合金薄带的方式,改进了磁致伸缩换能器的结构,并成功识别出环向裂纹缺陷。同时分析了试验过程中不确定度的来源,推导出了仅含有直接测量值的标准不确定度合成公式。研究结果为采用磁致伸缩换能器进行不锈钢波纹管缺陷无损评价提供了理论依据。Magnetostrictive transducer for the use of defect detection in stainless steel helical bellows has been developed. The finite element models of magnetic field distribution law have been calculated using commercial package Comsol Multiphysics firstly and the results confirm that magnetic field intensity can be increased observably after setting the ferromagnetic material. An artificial defect of circumferential crack has been identified by the improved transducer with wrapping nickel alloys. The uncertainty synthesis formula has been derived and standard uncertainty of measurement result has been calculated. The results have been providing a theoretical basis for nondestructive evaluation in stainless steel helical bellows using magnetostrictive transducer.

关 键 词：磁致伸缩换能器 不锈钢波纹管 检测 标准不确定度 应用 设计 磁场强度 裂纹缺陷 

分 类 号：TK172[动力工程及工程热物理—热能工程]