摘要
基于同心异径管的轴对称性建立了相应的力学模型,计算了同心异径管在32.0 MPa工作内压作用下的应力,讨论了同心异径管的径向、轴向、周向和相当应力的变化特征,确定了同心异径管应力的危险部位及其变化规律,并分析了基于静强度的同心异径管的最佳超应变度,得到了最佳自增强压力。对于以静强度失效为主要失效形式的同心异径管R(C)-100×50-Sch80S,其最佳自增强内压为64.3 MPa,危险点所对应的最佳超应变度为73.08%。
The mechanical model of concentric reducer was established based on axial symmetry, the stress of concentric reducer under 32.0 MPa internal pressure was calculated, and the characteristics of concentric reducer were discussed about the radial, axial, circumferential, and equiva lent stress, the distribution rule of stress and the dangerous point were obtained. The optimum overstrain extent of autofrettaged concentric reducer was researched based on static strength, and the optimal autofrettaged pressure was obtained. For concentric reducer such as R（C）-100X 50- SchSOS, the optimal autofrettaged pressure is 64.3 MPa, the optimum overstrain extent at dangerous point is 73.08%.
作者
陶春达
钟云龙
TAO Chun-da ZHONG Yun-long(School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China People＇s Government of Muchuan Country Gaosun Township, Leshan 614504, China)
出处
《石油化工设备》
CAS
2017年第4期7-10,共4页
Petro-Chemical Equipment
关键词
异径管
应力
有限元计算
超应变度
自增强
reducer
stress
finite element computation
overstrain extent
autofrettage
