Volume 7, Special Issue
مرور بر اساس
ارسال های اخیر
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Validation of Model-Based Real-Time Hybrid Simulation for a Lightly-Damped and Highly-Nonlinear Structural System
(Shahid Chamran University of Ahvaz, 2021-06-01)Hybrid simulation (HS) is a cost-effective alternative to shake table testing for evaluating the seismic performance of structures. HS structures are partitioned into linked physical and numerical substructures, with ...
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Predictive Control with Dynamic Hysteresis Reference Trajectory: Application to a Structural Base-Isolation Model
(Shahid Chamran University of Ahvaz, 2021-06-01)Over the last decades, in the field of control engineering, Model Predictive Control (MPC) has been successfully employed in many industrial processes. This due to, among other aspects, its capability to include constrains ...
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About Earthquakes in Subduction Zones with the Potential to Cause a Tsunami
(Shahid Chamran University of Ahvaz, 2021-06-01)The problem of occurrence of starting earthquakes in subduction zones is considered. Subduction is the phenomenon of movement of the oceanic lithospheric plate under the continental one. The oceanic lithospheric plate at ...
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A Generalized Identification of Joint Structural State and Unknown Inputs Using Data Fusion MKF-UI
(Shahid Chamran University of Ahvaz, 2021-06-01)The classical Kalman filter (KF) can estimate the structural state online in real time. However, the classical KF presupposes that external excitations are known. The existing methods of Kalman filter with unknown inputs ...
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On the Active Vibration Control of Nonlinear Uncertain Structures
(Shahid Chamran University of Ahvaz, 2021-06-01)This study proposes an active nonlinear control strategy for effective vibration mitigation in nonlinear dynamical systems characterized by uncertainty. The proposed scheme relies on the coupling of a Bayesian nonlinear ...
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Direct Normal Form Analysis of Oscillators with Different Combinations of Geometric Nonlinear Stiffness Terms
(Shahid Chamran University of Ahvaz, 2021-06-01)Nonlinear oscillators with geometric stiffness terms can be used to model a range of structural elements such as cables, beams and plates. In particular, single-degree-of-freedom (SDOF) systems are commonly studied in the ...
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Manifold Learning Algorithms Applied to Structural Damage Classification
(Shahid Chamran University of Ahvaz, 2021-06-01)A comparative study of four manifold learning algorithms was carried out to perform the dimensionality reduction process within a proposed methodology for damage classification in structural health monitoring (SHM). Isomap, ...
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Precision Shape Control of Ultra-thin Shells with Strain Actuators
(Shahid Chamran University of Ahvaz, 2021-06-01)This paper is part of an effort conducted at Université libre de Bruxelles (ULB) on behalf of European Space Agency (ESA) to control the shape of thin polymer shell structures with a unimorph layer of strain actuators ...
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Structural Health Monitoring of Multi-Storey Frame Structures using Piezoelectric Incompatibility Filters: Theory and Numerical Verification
(Shahid Chamran University of Ahvaz, 2021-06-01)In the present paper, we develop a novel method for structural health monitoring of multi-storey frame structures with the capability to detect and localise local damage. The method uses so-called spatial incompatibility ...
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On/off Nodal Reconfiguration for Global Structural Control of Smart 2D Frames
(Shahid Chamran University of Ahvaz, 2021-06-01)This paper proposes an on/off semi-active control approach for mitigation of free structural vibrations, designed for application in 2D smart frame structures. The approach is rooted in the Prestress–Accumulation Release ...
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Stress Control of a Piezoelectric Lumped-element Model − Theoretical Investigation and Experimental Realization
(Shahid Chamran University of Ahvaz, 2021-06-01)This contribution focuses on force- and stress-tracking of a multi-degree of freedom system by eigenstrain actuation. The example under consideration is an axially excited piezoelectric bar which can be modeled as a lumped ...
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Improving the linear stability of the visco-elastic Beck's beam via piezoelectric controllers
(Shahid Chamran University of Ahvaz, 2021-06-01)Control strategies for the visco-elastic Beck's beam, equipped with distributed piezoelectric devices and suffering from Hopf bifurcation triggered by a follower force, are proposed in this paper. The equations of motion ...
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VIV Control Strategies Using Displacement-Based Phenomenological Model
(Shahid Chamran University of Ahvaz, 2021-06-01)Linear and nonlinear feedback control of vortex-induced vibrations are assessed using a single degree-of-freedom phenomenological model of the uncontrolled response. The model is based on the role of linear and nonlinear ...
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Long-span Suspension Bridge Flutter Analysis with Drag Force Effects
(Shahid Chamran University of Ahvaz, 2021-06-01)The paper investigates the influence of the drag force onto the flutter velocity and frequency of the Akashi Kaikyo Bridge. Finite element analyses were run in ANSYS by combining unsteady lift and moment actions with: (a) ...
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Modeling of Flight of the Line Thrower Projectile
(Shahid Chamran University of Ahvaz, 2021-06-01)The actual problem of increasing the flight range of line thrower projectile which is a container with a line (thin rope) inside. The line leaves the container during the flight, i.e. the projectile has a variable mass. ...
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Flexural-Torsional Galloping of Prismatic Structures with Double-Symmetric Cross-Section
(Shahid Chamran University of Ahvaz, 2021-06-01)The linear galloping of prismatic structures having double-symmetric cross-section, subjected to steady wind flow acting along a symmetry axis, is investigated. The continuous system is reduced to a three degree-of-freedom ...
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Nonlinear dynamics and stability of a homogeneous model of tall buildings under resonant action
(Shahid Chamran University of Ahvaz, 2021-06-01)A homogeneous model of beam-like structure, roughly portraying the mechanical behavior of a tall building, is considered to address nonlinear dynamic response in case of external resonant excitation. A symmetric layout ...
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Natural frequencies and internal resonance of beams with arbitrarily distributed axial loads
(Shahid Chamran University of Ahvaz, 2021-06-01)An exact analytical solution for transversal free vibrations of a beam subjected to an arbitrary distributed axial load and a tip tension is obtained by means of a power series representation, whose coefficients are ...
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Temperature Dependent Damping in Additively Manufactured Polymer Structures
(Shahid Chamran University of Ahvaz, 2021-06-01)Temperature effects are predominantly ignored when computing the dynamic response of structures. Yet, in applications where large changes in temperature occur, the dynamic response can drastically change. This is particularly ...
