Study on Assessment Method for Typical Plate and Shell-Support in Nuclear Power Plants
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摘要: 开展核动力装置典型板壳型支承结构模型冲击性能试验,以试验数据为依据进行数值计算分析,初步探索该类结构抗冲击设计规范中强度评定准则的保守性。结果显示,当试验体的弹性名义应力远远高于规范中规定的许用应力值时,试验支承结构仍保持了结构完整性,表明现行支承结构抗冲击设计评价准则存在较大的保守裕量。对现行的板壳型支承结构抗冲击评定方法进行初步研究后,建议对此类结构现行抗冲击设计评定准则修改:保持实际屈服强度不变,在利用NF3200进行联合载荷下的应力计算时,建议将冲击载荷作用引起的冲击应力乘上0.5的系数,计算结果仍有一定的保守性;或保持应力计算式不变,建议将GJB1060.1-1991中实际屈服强度增大到原来的2倍左右。Abstract: The work of shock test of the support-model including model design,layout of the sensor,the test method and process,experimental results and discussion is presented in this paper.The experimental and the numerical results show that the nominal elastic stresses are much higher than those stipulated in the existing shock assessment codes of supports,which are supposed to be conservative.This preliminary study will provide some experimental and numerical data for modifying the present shock assessment criterions of supports.
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Key words:
- Plate and shell-support /
- Shock test /
- ANSYS /
- Numerical analysis /
- Assessment-method
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