scholarly journals Vibration Suppression of Beam Structures Traversed by Multiple Moving Loads Using a Damped Absorber

1993 ◽  
Vol 1 (1) ◽  
Author(s):  
Y.H. Lin ◽  
C.H. Cho
Keyword(s):  
Vibration Suppression ◽  
Moving Loads ◽  
Beam Structures

Passive Control of Vibration of Elastically Supported Beams Subjected to Moving Loads

2005 ◽  
Author(s):  
D. Younesian ◽  
E. Esmailzadeh ◽  
M. H. Kargarnovin
Keyword(s):  
High Speed ◽  
Passive Control ◽  
Vibration Suppression ◽  
Damping Ratio ◽  
Equations Of Motion ◽  
Compressive Force ◽  
Moving Loads ◽  
Axial Compressive Force ◽  
Before And After ◽  
Elastically Supported

Vibration suppression of elastically supported beams subjected to moving loads is investigated in this work. For a Timoshenko beam with an arbitrary number of elastic supports, subjected to a constant axial compressive force, and having a tuned mass damper (TMD) installed at the mid-span, the equations of motion are derived and using the Galerkin approach the solution is sought. The optimum values of the frequency and damping ratio are determined both analytically and numerically and presented as some design curves directly applicable in the TMD design for bridge structures. To show the efficiency of the designed TMD, computer simulation for two real bridges, subjected to a S.K.S Japanese high-speed train, is carried out and the results obtained are compared for before and after the installation of the TMD system.

ANFIS Active Vibration Control of Flexible Beam Structures

Volume 1 ◽  
2004 ◽  
Author(s):  
S. Z. Mohd. Hashim ◽  
M. O. Tokhi
Keyword(s):  
Vibration Control ◽  
Fuzzy Inference System ◽  
Dynamic Range ◽  
Vibration Suppression ◽  
Fuzzy Inference ◽  
Least Squares Method ◽  
Active Vibration Control ◽  
Flexible Beam ◽  
Beam Structures ◽  
Inference System

This paper presents the development of an adaptive neuro-fuzzy inference system (ANFIS) controller for vibration control of flexible beam structures. ANFIS constructs a fuzzy inference system (FIS) whose membership function parameters are tuned (adjusted) using the backpropagation algorithm and least squares method. This allows the fuzzy system to learn from the data modeling. To allow the non-linear dynamics of the system be incorporated within the design, a pseudo random binary signal (PRBS) covering the dynamic range of interest of the system is used to train the ANFIS model, which gives good output prediction. Simulation results showing the performance of the developed control scheme in vibration suppression of flexible beam structures, with changes in the excitation signal, are presented and discussed.

Vibration suppression of bridges under moving loads using the structure-immittance approach

2021 ◽  
pp. 106792
Author(s):  
Sara Ying Zhang ◽  
Xi Sheng ◽  
Jason Zheng Jiang ◽  
Haijun Zhou ◽  
Wei-Xin Ren ◽  
...  
Keyword(s):  
Vibration Suppression ◽  
Moving Loads

scholarly journals Self-Tuning Active Vibration Control in Flexible Beam Structures

1994 ◽  
Vol 208 (4) ◽  
pp. 263-278 ◽  
Author(s):  
M O Tokhi ◽  
M A Hossain
Keyword(s):  
Vibration Control ◽  
Vibration Suppression ◽  
Finite Difference Methods ◽  
Active Vibration Control ◽  
Digital Signal ◽  
Flexible Beam ◽  
Beam Structures ◽  
Single Input Single Output ◽  
Active Vibration ◽  
Single Input

This paper presents the design and performance evaluation of an adaptive active control mechanism for vibration suppression inflexible beam structures. A cantilever beam system in transverse vibration is considered. First-order central finite difference methods are used to study the behaviour of the beam and develop a suitable test and verification platform. An active vibration control algorithm is developed within an adaptive control framework for broadband cancellation of vibration along the beam using a single-input multi-output (SIMO) control structure. The algorithm is implemented on a digital processor incorporating a digital signal processing (DSP) and transputer system. Simulation results verifying the performance of the algorithm in the suppression of vibration along the beam, using single-input single-output and SIMO control structures, are presented and discussed.

Application of the Nonlinear Energy Sink Systems in Vibration Suppression of Railway Bridges

2010 ◽  
Author(s):  
Davood Younesian ◽  
Amir Nankali ◽  
M. Emad Motieyan
Keyword(s):  
Passive Control ◽  
Vibration Suppression ◽  
Nonlinear Energy Sink ◽  
Solution Technique ◽  
Moving Loads ◽  
Railway Bridges ◽  
Energy Sink ◽  
And Performance ◽  
Euler Bernoulli Beam ◽  
Nonlinear Energy

Vibration suppression of railway bridges using nonlinear energy sink systems (NES) is studied in this paper. Train is modeled as a set of successive moving loads traveling on an Euler-Bernoulli beam. Energy sink as a new passive control strategy is employed as the suppression system. Galerkin method here is adopted as the solution technique. Within a parametric study, series of numerical simulations are carried out and performance of the passive control system is investigated. It is numerically found that an appropriately designed NES can passively reduce the displacement of the bridge up to 43%.

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