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Structural Analysis and Design of Grid-Stiffened Sandwich Cylindrical Shells Using DQM
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Changxu LI1, Yongqi LIU1, Jianwei WANG2, Dong DU2, Guohua NIE1
Chinese Quarterly of Mechanics | 2025, 46(3) : 599 - 613
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Chinese Quarterly of Mechanics | 2025, 46(3): 599-613
Structural Analysis and Design of Grid-Stiffened Sandwich Cylindrical Shells Using DQM
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Changxu LI1, Yongqi LIU1, Jianwei WANG2, Dong DU2, Guohua NIE1
Affiliations
  • 1.School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
  • 2.Shanghai Institute of Satellite Engineering, Shanghai 200241, China
Published: 2025-09-25 doi: 10.15959/j.cnki.0254-0053.2025.03.004
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For the lightweight design problem of composite grid-stiffened sandwich cylindrical shells, this paper proposes an optimization strategy that couples the differential quadrature method (DQM) with intelligent algorithms. First, the buckling governing equations are established based on the smeared stiffener method and energy principle, which are efficiently solved using DQM and validated through finite element analysis. Subsequently, an artificial neural network (ANN) surrogate model and genetic algorithm (GA) are employed to achieve structural optimization. The results demonstrate that the critical buckling loads obtained via DQM agree well with finite element results, confirming the accuracy of DQM in analyzing the buckling of sandwich cylindrical shells. The ANN-based surrogate model exhibits high reliability in predicting the critical buckling loads of grid-stiffened sandwich shells. Moreover, the genetic algorithm, combined with theoretical results, efficiently yields lightweight design parameters. Case studies show that the optimized structure not only achieves significant weight reduction but also exhibits a substantial increase in critical buckling load.

composite grid-stiffened cylindrical shells  /  buckling  /  differential quadrature method (DQM)  /  lightweight design  /  artificial neural network (ANN)
Changxu LI, Yongqi LIU, Jianwei WANG, Dong DU, Guohua NIE. Structural Analysis and Design of Grid-Stiffened Sandwich Cylindrical Shells Using DQM[J]. Chinese Quarterly of Mechanics, 2025 , 46 (3) : 599 -613 . DOI: 10.15959/j.cnki.0254-0053.2025.03.004
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Article Info
doi: 10.15959/j.cnki.0254-0053.2025.03.004
  • Receive Date：2025-05-16
  • Online Date：2026-03-24
  • Published：2025-09-25
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  • Received：2025-05-16
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Affiliations
    1.School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
    2.Shanghai Institute of Satellite Engineering, Shanghai 200241, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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