This paper proposes an automatic tuning algorithm for a sliding mode controller (SMC) based on the Ackermann's formula, that attenuates structural vibrations of seismically excited building equipped with Active Tuned Mass Damper (ATMD) mounted its top floor. The switching gain and surface SMC are designed through proposed to suppress by minimizing either floor displacement or control force appl...

Cylindrical Frictional Damper (CFD) is a new revolutionary frictional based mechanical damper. Unlike the other types of frictional dampers, CFDs do not utilize bolts to produce friction between contact surfaces. These dampers consist of two main parts, the inner shaft and the external cylinder. These two parts are assembled such that one is shrink-fitted inside the other. In this investigation...

Magnetorheological (MR) dampers are one of the most promising new devices for structural vibration reduction. Because of their mechanical simplicity, high dynamic range, low power requirements, large force capacity, and robustness, these devices have been shown to mesh well with application demands and constraints to offer an attractive means of protecting civil infrastructure systems against s...

Abstract The use of integrally blisk is becoming popular because the advantages in aerodynamic efficiency and mass reduction. However, an blisk, lack contact interface leads to a low structural damping compared assembled bladed disk. One emerging technique for based on friction ring damper, which exploits interfaces at underneath In this paper, three different geometries dampers are investigate...

Friction in joints significantly contributes to the observed overall damping of mechanical structures. Especially if the material damping is low, the frictional effects in joints and clamping boundary conditions dominate the structural damping. The damping and the stiffness of the structure are nonlinear functions of the system states and consequently of the excitation signal and amplitude. If ...