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首页> 外文会议>ASME(American Society of Mechanical Engineers)/JSME Pressure Vessels and Piping Conference: Elevated Temperature Design and Analysis, Nonlinear Analysis, and Plastic Components; 20040725-20040729; San Diego,CA; US >PLASTIC ANALYSIS OF A REACTOR PRESSURE VESSEL SUPPORT PAD WITH DIFFERENT METHODS FROM APPENDIX F, FAULTED CONDITIONS, COMPARISON OF ALLOWABLE LOADS
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PLASTIC ANALYSIS OF A REACTOR PRESSURE VESSEL SUPPORT PAD WITH DIFFERENT METHODS FROM APPENDIX F, FAULTED CONDITIONS, COMPARISON OF ALLOWABLE LOADS

机译：附录F中不同方法对反应堆压力容器支撑垫进行塑性分析，断裂条件，允许载荷的比较

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摘要

The present paper shows the results of different plastic analysis methods stipulated in the ASME-code appendix F for faulted conditions. Results will be compared and differences with an elastic analysis are discussed. The analyzed structure is a support pad of the RPV (reactor pressure vessel) of a German PWR. There are four support pads equally distributed around the outer surface of the flange of the RPV. Under normal and faulted conditions these support pads serve as a link between the RPV and RPV support construction, which is in the German design a ring girder. A vertical force is applied onto the structure in an incremental manner until failure will occur. Real measured true stress strain curve is used. In the context of the European research project LISSAC [7] special attention is paid on local effects near holes or notches causing non-uniform stress and strain distributions. The chosen support pad provides such a hole. Allowable loads achieved with elastic analysis, plastic analysis, limit load or plastic analysis collapse load are compared. Details as well as problems of the numerical analysis were discussed. Another aspect is the strain distribution in a plastic analysis, especially near local discontinuities. As an outlook these plastic strains were compared with local failure strains found in the LISSAC project.
机译：本文显示了针对故障情况的ASME规范附录F中规定的不同塑性分析方法的结果。将比较结果，并讨论与弹性分析的差异。分析的结构是德国PWR的RPV（反应堆压力容器）的支撑垫。在RPV法兰的外表面周围均匀分布着四个支撑垫。在正常和有故障的情况下，这些支撑垫可作为RPV和RPV支撑结构之间的链接，该结构在德国设计中为环形大梁。垂直力以递增方式施加到结构上，直到发生故障。使用实际测量的真实应力应变曲线。在欧洲研究项目LISSAC [7]的背景下，要特别注意孔或槽口附近的局部影响，从而导致应力和应变分布不均匀。选择的支撑垫提供了这样的孔。比较了通过弹性分析，塑性分析，极限载荷或塑性分析崩溃载荷获得的允许载荷。讨论了数值分析的细节和问题。另一方面是塑性分析中的应变分布，尤其是在局部不连续附近。可以预见，将这些塑性应变与LISSAC项目中发现的局部破坏应变进行了比较。

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