安全壳中钢衬壳热屈曲问题理论与实验研究(I)———理论分析部分

钢衬壳热屈曲问题是核工程安全壳设计中的主要问题把铆固之间的钢衬壳视为钢衬板的特殊缺陷形式，利用Ｋｏｉｔｅｒ初始后屈曲理论分析了完善和具有初始缺陷钢衬壳的弹性热后屈曲性态给出了用挠度－温度载荷表示的钢衬壳的后屈曲平衡路径表达式和屈曲临界载荷表达式具体分析了三种钢衬壳模型：四点铆固钢衬壳、四边固支钢衬壳和五点铆固钢衬壳给出了钢衬的初始缺陷、锚钉间距、钢衬厚度等参数对钢衬热屈曲载荷的影响结果对安全壳中钢衬壳的设计有很好的参考价值

THEORETICAL AND EXPERIMENTAL ANALYSES OF THERMAL BUCKLING PROBLEMS OF LINER SHELLS ——THEORETICAL PART 1)

The buckling problem of liner shells is a major problem in reactor containment's design Because of the unilateral constraint and complex boundary condition, it is difficult to investigate post-buckling behavior of liner shells In this paper, the local liner shells are considered as the liner plates with the special initial imperfection forms Three liner shell models: four-point-supported liner shell, clamped liner shell and five-point-supported liner shell are proposed and investigated, respectively Koiter's asymptotic analysis theory of the initial post-buckling is used to obtain the expressions of the post-buckling equilibrium paths and the buckling critical loads (temperature or strain) for the perfect and imperfect liner shells The post-buckling behaviors of three liner shell models are analyzed and contrast The influence of initial imperfection, stud distance and liner thickness on the post-buckling critical temperatures is given also Contrast to the former paper on liner buckling, this paper obtains the simple expressions of post-buckling path and critical loads of liner shells