江门中微子探测器有机玻璃球与网架连接节点结构设计与实验研究

DESIGN AND TEST OF CONNECTING POINT BETWEEN ACRYLIC SPHERE AND STAINLESS STEEL TRUSS FOR JUNO CENTRAL DETECTOR

针对大型有机玻璃球与外围网架的连接节点进行结构设计,利用Abaqus对连接节点进行承载性能分析,模拟了结构所涉及的多重非线性问题,对比了不同理想边界条件下的计算结果。根据初步的节点结构制作等比例模型并进行承载实验,按照实验结果对结构做出改进,并对改进的节点结构进行承载性能分析。改进结构的模型承载实验结果符合预期,与有限元计算结果吻合良好。

The structure of connecting point between a large acrylic sphere and stainless steel truss outside was designed preliminarily, and its loading capacity was verified by finite element method using ABAQUS software. Multiple nonlinear problems involved in the FE model was simulated, and stress under different boundary conditions was compared. But results of loading experiment of preliminary structure did not reach expectations. Then preliminary structure of connecting point is improved, in accordance with the result of loading experiment, and loading capacity of improved structure was verified. Finally, testing results of loading experiment of improved structure was in line with expectations and met well with results of FEA.