【摘要】 为保证结构可靠性,采用有限元分析软件ANSYS模拟分配阀箱内部真空下的变形及应力分布,并对阀箱内部冷屏结构的应力场及温度场进行分析。结果表明:采用一种由槽钢和加强块结合的加强筋形式可以有效的防止阀箱结构失效。而采用铝制冷屏加液氮冷却盘管的形式,在外界热负荷的作用下,其表面最大温度低于80 K,其变形程度随吊杆所处圆周直径的增大而减小。更多还原

【Abstract】 To avoid structural failure,a simulation evaluating the stress and deformation of distribution valve box and shields,using commercial finite elements method code ANSYS,was conducted.At the end,a rib combining two channel beams and four small cubes was designed,which can keep the chamber lid from failure.Meanwhile,the results showed that the maximum temperature on shields made of aluminum alloys is below 80 K,and the deformation always reduces with increase of diameter.更多还原