Bat algorithm (BA) has been widely used to solve optimization problems in different fields. However, there are still some shortcomings of standard BA, such as premature convergence and lack diversity. To this problem, a modified directional bat (MDBA) is proposed paper. Based on the (DBA), individual optimal updating mechanism employed update bat’s position by using its own solution. Then, an e...

In this paper we present a simple, yet powerful, method for the identification of stiffness matrices of structural and mechanical systems from information about some of their measured natural frequencies and corresponding mode shapes of vibration. The method is computationally efficient and is shown to perform remarkably well in the presence of measurement errors in the mode shapes of vibration...