摘要
通过非循环理论方法推导出了多轴应力条件下压力管道的热棘轮极限解析解,并讨论了轴向压缩应力对棘轮极限的影响,提出了相应的设计方法,并采用简化有限元方法进行了验证。结果表明,轴向压缩应力会显著降低多轴载荷下压力管道的棘轮极限,本文的理论解与有限元分析结果吻合良好,与只考虑内压引起的环向应力和轴向应力情况相比,本文的解析解更加精确。这说明本文设计方法可用于评估压力管道及类似工况下结构的棘轮极限,具有一定的工程价值。
Analytical thermal ratchet limit of the pressurized pipes under multiaxial stress condition was deduced based on the non-cyclic method.The effect of axial compressive stress on the ratchet limit was stressed intensively.The corresponding design method was proposed and the closed-form solutions were validated by finite element method.Results revealed that the axial compressive stress will significantly decrease the ratchet limit under multiaxial loading.Moreover,the proposed ratchet limits are in very well agreement with those FEM results.The design method in this paper can be used to evaluate the ratchet limit of the pressurized pipes or other cylindrical structures under similar conditions,which has good engineering significance.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第2期277-280,共4页
Journal of East China University of Science and Technology
基金
国家自然科学基金(51305310)
关键词
棘轮极限
压力管道
多轴载荷
非循环方法
ratchet limit
pressurized pipes
multiaxial loadings
non-cyclic method
