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Buckling analysis of structures with local abnormality using non-uniform spline finite strip method
Computers & Structures ( IF 4.4 ) Pub Date : 2024-12-05 , DOI: 10.1016/j.compstruc.2024.107597
Hao Yu, Pizhong Qiao

Significance of structural components with local abnormality in buckling analysis has drawn considerable interest from researchers. A versatile and effective non-uniform spline finite strip method (N-u SFSM) is developed to allow for mesh refinement in local zones, enabling a comprehensive analysis of buckling characteristics of structures with local abnormality. The inclusion of non-uniform spline functions facilitates the precise modeling and refinement of localized abnormal (e.g., damage or geometric change) regions, leading to more accurate forecasts of fluctuations in buckling modes compared to the original finite strip method. The convergence and validation studies confirm the capability of N-u SFSM to accurately predict buckling behaviors in structures with local abnormality. The computational efficiency is significantly enhanced through the spline knot reduction achieved by optimizing the spline interpolation points, resulting in time and resource savings. The versatility of the N-u SFSM is demonstrated through the successful applications in various scenarios involving the locally-damaged channels, plates, and cylinders with differing damage sizes, types, locations, degrees, numbers, and shapes. The results confirm that the developed N-u SFSM, as a highly efficient and practical numerical technique, can accurately predict the buckling behaviors of both intact and damaged structures exhibiting local abnormalities, thereby providing valuable insights for structural analysis and design.

中文翻译:


使用非均匀样条有限条带法对具有局部异常的结构进行屈曲分析



具有局部异常的结构构件在屈曲分析中的重要性引起了研究人员的极大兴趣。开发了一种通用且有效的非均匀样条有限条带方法 (N-u SFSM),允许在局部区域进行网格细化,从而能够全面分析具有局部异常的结构的屈曲特性。包含非均匀样条函数有助于对局部异常(例如损伤或几何变化)区域进行精确建模和细化,与原始的有限条带方法相比,可以更准确地预测屈曲模式的波动。收敛和验证研究证实了 N-u SFSM 准确预测具有局部异常的结构屈曲行为的能力。通过优化样条插值点实现样条结减少,计算效率显著提高,从而节省时间和资源。N-u SFSM 的多功能性通过在各种场景中的成功应用得到证明,这些场景涉及具有不同损伤大小、类型、位置、程度、数量和形状的局部损坏通道、板和圆柱体。研究结果证实,所开发的 N-u SFSM 作为一种高效实用的数值技术,能够准确预测表现出局部异常的完整和受损结构的屈曲行为,从而为结构分析和设计提供有价值的见解。
更新日期:2024-12-05
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