A novel state space method for force identification based on the Galerkin weak formulation

作者：Wang, Ting; Wan, Zhimin; Wang, Xuelin^*; Hu, Yujin

来源：COMPUTERS & STRUCTURES, 2015, 157: 132-141.

DOI：10.1016/j.compstruc.2015.05.015

• Force identification
• Galerkin weak formulation
• Discontinuous loading
• High noise level

A novel force identification method in state space based on the Galerldn weak formulation is proposed. Using the time function interpolations of both displacement and force, the equation of motion of structural system in state space based on the principle of weighted momentum is formulated. The method is more suitable for the cases of large time step and discontinuous loading compared with the conventional state space method and the explicit Newmark method. Additionally, the proposed method is extended to a refined version for the case of high noise level by dividing the time step into several smaller time substeps.

• 出版日期2015-9
• 单位华中科技大学