Crack Life Evaluation of Flywheel for Canned Main Pump

doi:10.16183/j.cnki.jsjtu.2019.03.008

Abstract

Abstract: A new crack life assessment method is proposed for the bimetal shielded nuclear main pump flywheel with complex structure and force. This paper establishes a three-dimensional model of canned main pump flywheel with crack and uses the finite element software ANSYS Workbench to analyze the fracture mechanics. Then we find the relationship between the stress intensity factor of flywheel crack with the rotational speed, crack depth and crack length, which is used to fix the formula of stress intensity factor. Moreover, we use the Paris formula to evaluate the life of flywheel crack. The stress distribution of the flywheel and the stress intensity factor of the crack are obtained, and the relationship between crack size and the stress intensity factor is found to calculate the crack life, which is within safety limits. The revised calculation method is adopted to bimetallic flywheel for canned main pump under complex situations and with complex structures.

Key words: canned main pump, bimetallic flywheel, Paris formula, crack life evaluation, stress intensity factor

CLC Number:

TL 353

LIU Bingyi，ZHANG Jige，WANG Dezhong，LI Bin. Crack Life Evaluation of Flywheel for Canned Main Pump[J]. Journal of Shanghai Jiaotong University, 2019, 53(3): 315-320.

References

［1］项京锋, 郭鹏, 周新华. AP1000屏蔽式主泵的制造难点及国产化［C］//中国核能行业协会2010年中国核能可持续发展论文集. 北京：中国核能行业协会， 2010: 138-144. XIANG Jingfeng, GUO Peng, ZHOU Xinhua. Difficulties in manufacturing and localization of AP1000 shielded main pump［C］//China Nuclear Energy Industry Association 2010 China Nuclear Energy Sustainable Development Proceedings. Beijing: China Nuclear Energy Industry Association, 2010: 138-144. ［2］PARK J S, SONG H C, YOON K S, et al. Structural integrity evaluation for interference-fit flywheels in reactor coolant pumps of nuclear power plants［J］. Journal of Mechanical Science and Technology, 2005, 19(11): 1988-1997. ［3］ORM W U. Structural analysis summary for the reactor coolant pump high inertia flywheel ［M］. Charlotte, NC: Curtiss-Wright Electro-Mechanical Corporation, 2006. ［4］李笑天, 鞠红惠, 何树延, 等. 主循环泵惯性飞轮完整性分析［J］. 原子能科学技术, 2007, 41(4): 463-467. LI Xiaotian, JU Honghui, HE Shuyan, et al. Integrity analysis of inertia flywheel of main circulating pump［J］. Atomic Energy Science and Technology, 2007, 41(4): 463-467. ［5］葛磊, 王德忠, 张继革. 屏蔽电机主泵惯性飞轮完整性分析［J］. 上海理工大学学报, 2012, 34(6): 584-588. GE Lei, WANG Dezhong, ZHANG Jige. Integrity analysis of inertia flywheel of shield motor main pump［J］. Journal of University of Shanghai for Science and Technology, 2012, 34(6): 584-588. ［6］ASME. ASME boiler and pressure vessel code section XI［S］. New Yrok: ASME, 2010: 395-405. ［7］张贵滨. 冷却剂泵电机飞轮完整性分析［J］. 民营科技, 2010(6): 16. ZHANG Guibin. Integrity analysis of flywheel of coolant pump motor［J］. Private Technology, 2010(6): 16. ［8］贾鑫, 杨彬. 飞轮断裂力学分析［J］. 电子世界, 2013(6): 82. JIA Xin, YANG Bin. Fracture mechanics analysis of flywheel［J］. Electronics World, 2013(6): 82. ［9］陈传尧, 高大兴. 表面裂纹的应力强度因子［J］. 机械强度, 1984(1): 41-57. CHEN Chuanyao, GAO Daxing. Stress intensity factor of surface crack［J］. Journal of Mechanical Strength, 1984(1): 41-57. ［10］US Nuclear Regulatory Commission. NUREG-0800［J］. Standard Review Plan, 2007, 3(3): 5.4.1.1-6. ［11］PARIS P C, ERDOGAN F. A critical analysis of crack propagation laws［J］. Journal of Basic Engineering, 1963, 85(4): 528-533. ［12］中国航空研究院. 应力强度因子手册［M］. 增订版.北京: 科学出版社, 1993: 344-348. China Aviation Research Institute. Stress intensity factor handbook［M］. Updated edition. Beijing: Science Press, 1993: 344-348. ［13］机械设计手册编委会. 机械设计手册: 疲劳强度设计［M］. 北京: 机械工业出版社, 2007: 134. Mechanical Design Manual Editorial Board. Mechanical design manual: Fatigue strength design［M］. Beijing: Mechanical Industry Press, 2007: 134.

[1]	HE Shijiu,ZHANG Xiaojing,WANG Hai. Analytical Methodology of Predicting Mode Ⅰ Stress Intensity Factor for Cracked Panels with Bonded Stiffener [J]. Journal of Shanghai Jiaotong University, 2016, 50(02): 251-256.
[2]	YAN Xiaoshun1,2,HUANG Xiaoping1,LIANG Yuanhua3,LI Luodong3. Stress Intensity Factor Calculation of Surface Crack at Weld Toe of Ocean Engineering Structures Under Wave Loads [J]. Journal of Shanghai Jiaotong University, 2016, 50(02): 288-293.
[3]	ZHENG An-xing (郑安兴), LUO Xian-qi*(罗先启). Numerical Study of Quasi-Static Crack Growth Problems Based on Extended Finite Element Method [J]. Journal of shanghai Jiaotong University (Science), 2014, 19(6): 736-746.
[4]	CHEN Jing-Jie-a, HUANG Yi-a, WU Zhi-Min-b. A New Method to Calculate Stress Intensity Factor for Parallel Double Cracks [J]. Journal of Shanghai Jiaotong University, 2012, 46(08): 1263-1268.
[5]	ZHOU Xiao-ping, ZHANG Yong-xing, WANG Jian-hua, HA Qiu-ling. The Influence of Interaction of Complex Multicracks on Stress Intensity Factors [J]. Journal of Shanghai Jiao Tong University, 2003, 37(12): 1905-1909.