Title: New approach for active control of smart structure's vibrations subjected to blast loading using multi actuators and sensors

Authors: Babak Karimpoor; A. Kayhani

Addresses: Department of Civil Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran ' Civil Engineering, Shahrood University, Shahrood, Iran

Abstract: The blast loadings lead to serious damages in structures so that designers try to reduce these effects by special methods. In comparison with other threats such as earthquake and wind, the blast load has some unique characters, i.e., the applied pressure to the structure, the situation of the blast source and small duration of blast loading. Here, new approach is presented for controlling the structural vibrations arise from the blast loads. The proposed active control method is based on structural dynamics theories in which multi actuators and sensors are utilised. Each actuator force is modelled as an equivalent viscous damper so that several lower vibration modes are damped critically. This subject is achieved by simple mathematical formulation. The proposed method does not depend on the type of dynamic load and it could be applied to control structures with multi degrees of freedom. For numerical verification of proposed method, several criterions such as maximum displacement, maximum kinetic energy and maximum drift are evaluated in five story shear building, subjected to the blast load. This study shows that the proposed method has suitable efficiency for reducing structural vibrations causes from the blast loading.

Keywords: blast loading; smart structures; active control; actuators; sensors; displacement; drift; kinetic energy; structural vibration; structural damage; structural dynamics; actuator force; modelling; viscous damping; five story buildings; smart buildings.

DOI: 10.1504/IJSTRUCTE.2015.069695

International Journal of Structural Engineering, 2015 Vol.6 No.2, pp.184 - 194

Received: 19 Nov 2013
Accepted: 25 Oct 2014

Published online: 29 May 2015 *

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