ABSTRACT
Direct measurements of dynamic loads acting on engineering structures such as a ship during operation can be challenging. Consequently, dynamic load identification as a technique is being used to predict dynamic loads acting on structures from the measured structural responses. In this paper, a cantilever beam as a simple continuous system subjected to a time-dependent force is analyzed analytically to extract structural stress dynamics characteristics in global matrix form, then by using the concept of continuous-time state-space model, the Green’s Kernel Function (GKF) is determined. Due to the ill-posed nature of the GKF matrix, a convex optimization is employed to convert the ill-posed problem into well-posed one, but in this paper by estimating the exact time step, the dynamic load associated with the kernel function matrix can be reliably determined without the need for any further regularization method. Numerical simulations are utilized to validate the proposed method, and the applicability of the function is analyzed.
