Active Vibration Control of Elastically Connected Double-Beam Systems

Li, Y. X.; Sun, Lizhi

doi:10.1061/(asce)em.1943-7889.0001341

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…Two connected beams or more are studied as high or large structure constructed in civil and mechanical engineering (Coleman and Mcsweeney, 2017; Li and Sun, 2016; Szmidt et al , 2017; Li and Sun, 2017; Li et al , 2012; Ghafarian and Ariaei, 2016; Zhang et al , 2014; Li et al , 2016; Mao and Wattanasakulpong, 2015; Fei et al , 2017; Huang et al , 2017). Zhang et al (2014) solved double beam coupled with elastic supports using the transfer matrix method.…”

Section: Introductionmentioning

confidence: 99%

Dynamical shakedown analysis of high-rise tower structure

Hong-tao

Peng

Liu

2021

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Purpose High-rise tower structures supported by side frame structure and viscous damper in chemical industry can produce plasticity under dynamic loads, such as wind and earthquake, which will heavily influence the long-term safety operation. This paper aims to systematically study the optimization design of these structures by free vibration and dynamic shakedown analysis. Design/methodology/approach The transfer matrix method and Euler–Bernoulli beam vibration are used to study the free vibration characteristic of the simplified high-rise tower structure. Then the extended stress compensation method is used to construct the self-equilibrated stress by using the dynamic load vertexes and the lower bound dynamic shakedown analysis for the structure with viscous damper. Using the proposed method, comprehensive parametric studies and optimization are performed to examine the shakedown load of high-rise tower with various supported conditions. Findings The numerical results show that the supported frame stiffness, attached damper or spring parameters influence the free vibration and shakedown characters of high-rise tower very much. The dynamic shakedown load is lowered down quickly with external load frequency increasing to the fundamental natural frequency of the structure under spring supported condition, while changed little with the damping connection. The optimized location and parameter of support are obtained under dynamical excitations. Research limitations/implications In this study, the high-rise tower structure is simplified as a cantilever beam supported by a short cantilever beam and a damper under repeated dynamic load, and linear elasticity for solid is assumed for free vibration analysis. The current analysis does not account for effects such as large deformation, stochastic external load and nonlinear vibration conditions which will inevitably be encountered and affect the load capacity. Originality/value This study provides a comprehensive method for the dynamical optimization of high-rise tower structure by combining free vibration and shakedown analysis.

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Section: Introductionmentioning

confidence: 99%

Dynamical shakedown analysis of high-rise tower structure

Hong-tao

Peng

Liu

2021

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“…Beam-type structures are widely used in mechanical, civil, rail transportation, material engineering, and other fields. In engineering applications, it is of great importance to predict the dynamic response of beam-type structures accurately [1,2].…”

Section: Introductionmentioning

confidence: 99%

Vibration Theoretical Analysis of Elastically Connected Multiple Beam System under the Moving Oscillator

Feng

2019

Advances in Civil Engineering

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To investigate the vibration analysis of elastically connected multiple beam system (ECMB) under the moving oscillator, finite sine-Fourier transform has been applied to the dynamic partial differential equations of ECMB with respect to space coordinates. en, the numerical integration has been used to solve the equations. Finally, the expression for vibration analysis of ECMB under the moving oscillator has been derived based on finite sine-Fourier inverse transform. Using the method developed in this study and ANSYS numerical method, the vibration analysis of a four-layer beam system under moving oscillator with different speeds has been calculated. e results show that the calculated results from the method developed in this study are in good agreement with the ANSYS numerical calculation results, and the differences between the two calculation results are all less than 2%, which verified the correctness of the method developed in this study. e method developed in this study has been applied to the beamrail system on a railway line in China. e effect of the train speed and interlayer stiffness on the vibration of beam-rail system has been investigated. e results show that the maximum dynamic deflection of the rail under the train load is always near the midspan, while the maximum dynamic deflections of the track plate, base plate, and bridge occur after the train travel through the midspan. e interlayer stiffness has a larger impact on the vibration of the rail and the track plate and little impact on the vibration of the base plate and the bridge.

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