核反应堆驱动机构外套筒对整机抗震性能的影响.doc

核反应堆驱动机构外套筒对整机抗震性能的影响 *，文 豪2，谢罗峰1， 殷国富1 (1.四川大学制造科学与工程学院，四川 成都，610065；2.西南交通大学，成都，610031) 摘要：安全棒驱动机构是核反应堆的重要组成部分，其抗震性能是反应堆安全性评价中的重要指标。在设计初期预知地震载荷下的应力分布情有助于提高该机构的高抗震性能。针对某型安全棒驱动机构的设计特征,建立了一种基于反应谱原理的驱动机构外套筒 中图分类号：TL48;TM623 文献标识码：A Influence of the Outer Sleeve on the Anti-seismic Characteristic of Nuclear-Fuel-Safety-Rod-Driving Mechanism Meng Lintao1, Yin Qin, Wen Hao, Xie Luofeng, Yin Guofu （1.Sichuan University, Chengdu, 610065, China; 2.Southwest Jiaotong University, Chengdu, 610031, China） Abstract：Nuclearfuel-safety-rod-driving mechanism is an important part of the nuclear reactor and its seismic characteristic is a very critical parameter in safety evaluation. In the preliminary design stage, simulating the distribution of stress under seismic load is helpful to improve its seismic characteristic. To ensure that the nuclear fuel safety rod driving mechanism functions safely and reliably in the whole longevity, the seismic analysis was carried out at the level of preliminary design. First, the model of nuclear-fuel-safety-rod-driving mechanism was simplified based on the parameter settings. Second， the seismic response spectrum was ensured, referring to domestic and overseas seismic fortification criterion，and then the practical condition was analyzed and it was converted to boundary condition in finite element model. The stress distribution of the whole mechanism and the outer sleeve and the single internal structure were calculated and compared. And the influence of the outer sleeve on seismic characteristic was studied. The typical node paths were constructed based on the features of three models. Compared with the extracted stress from the node paths, the difference of stress distribution of three models was obviously obtained. The results indicating that directly analyzing the stress distribution of the outer sleeve could evaluate the rationality of the whole mechanism. The results illustrated that the outer sleeve can efficiently reduce the stress o