基于三维光学扫描技术的P92钢热挤压三通强度校核与评定  

Strength Checking and Evaluation of P92 Hot-extruded Tee Based on 3D Optical Scanning Technology

作　　者：史志刚[1] 李楠林 马红[1] 贾建民[1] 张红军[1] 熊伟[2] SHI Zhigang;LI Nanlin;MA Hong;JIA Jianmin;ZHANG Hongjun;XIONG Wei(Xian Thermal Power Research Institute Co.,Ltd.,Xian 710054,China;Yuhuan Power Plant,Huaneng Power International,Inc.,Yuhuan 317604,Zhejiang Province,China)

机构地区：[1]西安热工研究院有限公司,西安710054 [2]华能国际电力股份有限公司玉环电厂,浙江玉环317604

出　　处：《动力工程学报》2020年第11期929-935,共7页Journal of Chinese Society of Power Engineering

摘　　要：以服役8.5万h开裂的P92热挤压三通为研究对象,通过三维光学扫描技术对其尺寸进行测绘,并基于测绘尺寸进行强度校核和有限元应力分析,进而进行应力强度评定。结果表明:三通的测绘尺寸与实际尺寸较符合;三通的最大应力位于肩部内壁转角中心,与服役8.5万h时的启裂位置吻合;肩部较弱的结构强度是引起三通开裂的强度因素。Taking the P92 hot-extruded tee with cracks after service for 85 000 hours as an object of study, the size of the tee was mapped by 3 D optical scanning technology, and subsequently the strength checking and stress finite element analysis were carried out, following which, the stress intensity assessment was performed. Results show that the size of the P92 hot-extruded tee obtained by three-dimensional optical mapping is in good agreement with the actual data. The maximum stress is located at the corner center on inner wall of the shoulder, which coincides with the initiation position after service for 85 000 hours. The weak structural strength at the shoulder is the main factor causing the cracking of the P92 hot-extruded tee.

关 键 词：三通 三维光学扫描技术 强度校核 应力强度评定 

分 类 号：TK225[动力工程及工程热物理—动力机械及工程]