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基于四节点Timoshenko层合梁理论和八节点薄壳单元相关理论,通过自编四节点板单元和八节点壳单元,实现了加筋前后双曲度复合材料薄壳单元的大网格高精度计算。结果表明:八节点单元精度稍高,但四节点单元分析的时间更短,因而效率更高,更具有工程实用性;筋条网格尺寸大小对计算精度影响小。研究成果可用于大规模复合材料双曲度结构设计和分析。
Based on the theory of four-node Timoshenko laminated beam and the related theory of eight-node shell element, the large-grid high-precision calculation of the double curved composite thin-shell element before and after reinforcement is realized by self-designing four-node plate element and eight-node shell element . The results show that the accuracy of the eight-node unit is slightly higher, but the analysis time of the four-node unit is shorter, so it is more efficient and more practical. The size of the grid of bars has little effect on the calculation accuracy. The research results can be used for the design and analysis of large-scale composite double-curvature structures.