摘要
针对基于能量准则的板翅式换热器封头强度设计问题,给出了比率塑性功曲率(Ratio Plastic WorkCurvature,RPWC)准则塑性载荷和塑性功曲率(Plastic Work Curvature,PWC)准则塑性载荷确定方法。两种准则的封头塑性压力结果一致表明大变形效应对封头结构有强化效果。5种接管开孔率的塑性压力比较结果表明,PWC塑性压力最大,RPWC塑性压力其次,PWC工程塑性压力最小,RPWC塑性压力对应的比率塑性功小于PWC零曲率塑性载荷对应的比率塑性功。RPWC准则相对PWC零曲率准则临界塑性指标更严格,具有偏安全、简便直观的特点,适合板翅式换热器封头这类复杂结构的塑性压力计算,而PWC工程塑性载荷可用于工程设计载荷的保守估计。
To investigate the strength design of the plate-fin heat exchanger header based on energy criteria, the calculation methods of plastic load based on Ratio plastic work curvature （RPWC） criterion and Plastic work curvature （PWC） criterion are compared. The plastic pressure results determined by both criteria for the header indicate that large deformation effect will strengthen the structure. The comparison of the plastic pressure results for the header with five opening ratios ranging from 0.2 to 1.0, indicates that PWC zero curvature plastic pressure is the largest, RPWC plastic pressure is the second largest, and PWC engineering plastic pressure is the smallest; The ratio plastic work corresponding to the RPWC plastic pressure is less than that of PWC zero curvature plastic pressure. The RPWC criterion with strict critical plastic index is more conservative, simpler and more intuitive than PWC zero curvature criterion, and is thus suitable for such complex structure as the plate-fin heat exchanger header for calculating plastic load, while PWC engineering plastic load suggested can be used as the conservative approximation of plastic load for engineering design.
出处
《工程力学》
EI
CSCD
北大核心
2013年第5期329-334,共6页
Engineering Mechanics
基金
福建省自然科学基金项目(2011J01298)
关键词
分析设计
塑性载荷
比率塑性功曲率
弹塑性分析
能量准则
design by analysis
plastic load
ratio plastic work curvature
elastic-plastic analysis
energy criteria
作者简介
通讯作者：王伟（1970-），男，四川安岳人，副教授，博士，硕导，从事承压设备完整性、机械CAD／CAE研究fE-mail：mkwang@fzu．edu．cn）．作者简介：邹先平（1986-），男，湖北荆州人，硕士生，从事承压设备完整性研究（E-mail：zouxianping201@163．com）．
