超大型中微子探测器有机玻璃球与不锈钢网壳方案的设计优化分析  

DESIGN AND OPTIMIZATION OF AN ACRYLIC BALL SUPPORTED BY A STAINLESS STEEL LATTICED SHELL FOR THE ULTRA-LARGE NEUTRINO CENTRAL DETECTOR

作　　者：王元清[1] 王综轶 杜新喜[2] 衡月昆[3] 宗亮[1] 秦中华[3] 

机构地区：[1]清华大学土木工程安全与耐久教育部重点实验室,北京100084 [2]武汉大学土木建筑工程学院,武汉430072 [3]中国科学院高能物理研究所,北京100049

出　　处：《工程力学》2016年第3期10-17,共8页Engineering Mechanics

基　　金：清华大学自主科研计划课题(学科交叉专项)项目(20131089288);中国科学院战略性先导科技专项(A类)项目(XDA10010200)

摘　　要：江门中微子探测器规模巨大,直径将达到35.5 m。为了得到满足江门中微子探测器使用要求的结构方案,该文针对其设计工况和要求,提出了有机玻璃球+双层不锈钢网壳支撑的方案,完成了结构的初步设计以及有限元分析。在此基础上对杆件截面、撑杆布置等方面进行了优化,并且对优化后的结构进行强度、温度和影响因素分析。结果表明,优化方案有机玻璃球上最大Mises应力降低了12.6%,撑杆的最大轴力降低6.3%,结构最大位移降低5.8%。考虑几何和材料非线性时,优化结构的荷载系数为2.12,满足稳定计算的要求。提升内液面的高度、升高温度均能减小有机玻璃的应力;节点失效对于结构影响不大,而地震作用导致支柱过大的应力可以通过增加斜向撑杆来降低。The Jiangmen neutrino central detector is quite large, with a diameter of 35.5 m. In order to achieve a feasible structural scheme, this paper introduces the following structural scheme： an acrylic ball supported by a double-layer stainless steel latticed shell. It then carries out the preliminary design and finite element analysis. The component section, brace distribution and other aspects have been optimized based on the preliminary design and strength, stability, influence factor analyses implemented upon it. The results show the maximum Mises stress on the acrylic ball is decreased by 12.6%, the maximum axial force of braces is reduced by 6.3%, and the maximum structural deflection is decreased by 5.8% in the optimized model. Moreover, the load factor reaches 2.12 in consideration of the material and geometric non-linearity, which satisfies stability requirements. Raising the liquid level inside the acrylic ball and elevating the temperature are capable of reducing the stress on the acrylic. Joint failure has little influence on the structure and seismic action can be resisted by adding diagonal braces.

关 键 词：中微子探测器 有机玻璃 不锈钢 网壳 结构选型 

分 类 号：TU399[建筑科学—结构工程]