Gasturbines@SNU

  Force identification is an inverse analysis procedure to estimate the externally applied forces on a system from the dynamic responses such as acceleration and velocity measured by sensors. We aim to develop an efficient force identification method for nonlinear dynamic structural systems that experience both large rigid-body motion and large deformation. Unlike conventional state space methods, the proposed formulation employs the finite element equations of motion that can be solved using a conventional time integration method. Here, we additionally calculate the sensitivity of dynamic responses on force parameters by solving these equations inversely and iteratively. Since this method is developed within standard finite element framework, it can be easily combined with any finite element model previously constructed for forward simulation and integrated with commercial finite element software.