期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
反应堆压力容器密封环有限元模拟技术研究 被引量:3
1
作者 邵雪娇 郑连纲 +2 位作者 苏东川 傅孝龙 邝临源 《核动力工程》 EI CAS CSCD 北大核心 2015年第S2期142-145,共4页
借助ANSYS的非线性等向强化本构模型,对反应堆压力容器O形密封形环的弹塑性进行有限元模拟。通过密封环3种模拟方式(均布压力、弹簧单元、三维实体)得到的反应堆压力容器分离量结果并进行对比,发现三维实体模拟方式能够有效地降低分析... 借助ANSYS的非线性等向强化本构模型,对反应堆压力容器O形密封形环的弹塑性进行有限元模拟。通过密封环3种模拟方式(均布压力、弹簧单元、三维实体)得到的反应堆压力容器分离量结果并进行对比,发现三维实体模拟方式能够有效地降低分析的过余保守性,提高密封分析计算结果精度。 展开更多
关键词 压力容器 密封环模拟 弹塑性
原文传递
Numerical simulation on rotordynamic characteristics of annular seal under uniform and non-uniform flows 被引量:4
2
作者 吴大转 姜新阔 +2 位作者 初宁 武鹏 王乐勤 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第8期1889-1897,共9页
Currently, the flow field of annular seals disturbed by the circular whirl motion of rotors is usually solved using computational fluid dynamics(CFD) to evaluate the five rotordynamic coefficients. The simulations are... Currently, the flow field of annular seals disturbed by the circular whirl motion of rotors is usually solved using computational fluid dynamics(CFD) to evaluate the five rotordynamic coefficients. The simulations are based on the traditional quasi-steady method. In this work, an improved quasi-steady method along with the transient method was presented to compute the rotordynamic coefficients of a long seal. By comparisons with experimental data, the shortcomings of quasi-steady methods have been identified. Then, the effects of non-uniform incoming flow on seal dynamic coefficients were studied by transient simulations. Results indicate that the long seal has large cross stiffness k and direct mass M which are not good for rotor stability, while the transient method is more suitable for the long seal for its excellent performance in predicting M. When the incoming flow is non-uniform, the stiffness coefficients vary with the eccentric directions. Based on the rotordynamic coefficients under uniform incoming flow, the linearized fluid force formulas, which can consider the effects of non-uniform incoming flow, have been presented and can well explain the varying-stiffness phenomenon. 展开更多
关键词 long pump seal rotordynamic coefficients transient computational fluid dynamics(CFD) dynamic mesh non-uniform incoming flow
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部