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This study analyzed the dynamic response of truss structures with initial length imperfections under harmonic loading. A novel hybrid finite element method was developed, using both displacements and internal forces as unknowns in equations derived from the principle of virtual work. Imperfections introduced geometric nonlinearity, addressed through an incremental-iterative algorithm. Simulations showed accurate, efficient results for nodal displacements and internal forces. Even small imperfections significantly impacted dynamic behavior, highlighting their importance in nonlinear analysis and design.

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Modeling Truss Structures with Initial Length Imperfections Using Hybrid Finite Element Approach

  • 会议论文

  • 发表日期：

    2026年

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  • Thuy Van Tran Thi,
  • Tien Dao Ngoc,
  • Bich Quyen Vu Thi

摘要

This study analyzed the dynamic response of truss structures with initial length imperfections under harmonic loading. A novel hybrid finite element method was developed, using both displacements and internal forces as unknowns in equations derived from the principle of virtual work. Imperfections introduced geometric nonlinearity, addressed through an incremental-iterative algorithm. Simulations showed accurate, efficient results for nodal displacements and internal forces. Even small imperfections significantly impacted dynamic behavior, highlighting their importance in nonlinear analysis and design.