基于权函数法的核主泵飞轮应力强度因子研究  

Research on stress intensity factors of reactor coolant pump flywheel based on weight functions

作　　者：阴宏宇 王跃方[2,3] 王俊杰 关晓 Yin Hongyu;Wang Yuefang;Wang Junjie;Guan Xiao(Shenyang Blower Works Group Corporation,110869,Shenyang,China;Department of Engineering Mechanics,Dalian University of Technology,116024,Dalian,China;SBW Research Institute of Collaborative Innovation Center of Major Machine Manufacturing in Liaoning,116024,Dalian,China;CRRC Qingdao Sifang Co.,Ltd.,266111,Qingdao,China)

机构地区：[1]沈阳鼓风机集团股份有限公司,沈阳110869 [2]大连理工大学工程力学系,大连116024 [3]辽宁重大装备制造协同创新中心沈鼓研究院,大连116024 [4]中车青岛四方机车车辆股份有限公司,青岛266111

出　　处：《应用力学学报》2020年第2期573-579,I0007,I0008,共9页Chinese Journal of Applied Mechanics

基　　金：国家重点基础研究发展计划(2015CB057300);中央高校基本科研业务费(DUT18ZD22)。

摘　　要：采用权函数法确定了含裂纹飞轮在离心力和接触压力作用下的应力强度因子,计算了在同步转速工况下裂纹尖端应力强度因子的值,并与解析法和有限元法计算结果进行了对比。结果表明:权函数法与解析法的误差在3%以内,与有限元法的误差在1%以内,验证了权函数法计算应力强度因子的准确性高;在结构不变的情况下,权函数法可以快速求解不同载荷条件、不同长度裂纹的应力强度因子。通过控制变量法研究了不同参数对应力强度因子的影响,结果表明,飞轮裂纹尖端总应力强度因子随着裂纹尺寸、旋转转速、飞轮尺寸外径与内径比值的增大而增大。In this paper,the weight functions are used to determine the stress intensity factors of the cracks in a flywheel.The stress intensity factors of crack tips under the synchronous speed are calculated.Compared with theresults of analytical method and finite element method,the accuracy of the weight function methods is verified.Without changing the structure size,the weight functions can quickly solve the crack stress intensity factors of different loadings and crack lengths.Finally,effect of different parameters on the stress intensity factors is studied by control variables technique.With the increase of crack length,rotation speed,and the ratio of outer radius to inner radius,the total stress intensity factors near the crack tip increase.

关 键 词：核主泵飞轮 权函数法 应力强度因子 断裂 裂纹 

分 类 号：O346.1[理学—固体力学]