ITER真空室中子屏蔽组件的热—静力学有限元分析

THERMO-STATIC FEM ANALYSIS FOR NEUTRON SHIELDING COMPONENT OF ITER VACUUM VESSEL

根据ITER(InternationalThermonuclearExperimentalReactor)真空室中子屏蔽组件的设计概念和结构特点,应用有限元分析软件ANSYS对结构组件进行静力学分析和热—结构耦合分析。有限元计算结果表明,等离子体中心破灭事件(centraldisruption27msec——CD27ms)下的巨大瞬间电磁载荷对其产生的应力与变形远小于真空室温度环境造成的应力影响,尤其在接触应力计算上表现最为明显。因此,根据强度分析的结果重新对中子屏蔽组件的结构方案进行修改,分析结果表明改进后的结构更加合理。

Neutron shielding components design concept and structure features of ITER（ International Thermonuclear Experimental Reactor） vacuum vessel were briefly introduced. Static and thermo-structure coupling analyses were performed based on FEM（finite element method） software ANSYS, respectively. The calculation results show that the level of the stresses induced by dectronic-magnetic loads is much less than that induced by thermal environment of the vacuum vessel, especially in the case of the contact stress calculation. A new improved structure scheme has been put forward according to the analysis results, and it seems the improve structure is more reasonable.