Dynamic Behaviour of a Single-Span Beam Subjected to Loads Moving With Variable Speeds

Michaltsos, George T.

doi:10.1006/jsvi.2002.5141

Cited by 91 publications

(43 citation statements)

References 15 publications

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“…If all the damping in the elastic body is viscous damping, the damping of the beam has very little influence on the vibration of the structure [21]; the damping ratio is usually 0.1%-0.7%.…”

Section: Description Of Vibrationmentioning

confidence: 99%

Nonlinear Vibration of Ladle Crane due to a Moving Trolley

Xin

et al. 2018

Mathematical Problems in Engineering

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The structural vibration of the main beam of a crane causes fatigue damage and discomfort to the driver. The swing of the payload has an effect on positioning precision, especially for a ladle crane, and this directly affects production safety. To study the influence of system parameters on the vibration of a crane's main beam and the angle of the payload, a system consisting of the main beam, trolley, payload, and cabin was constructed. A rigid-flexible coupling dynamic model of a moving trolley with a hanging payload that moves on the flexible main beam with a concentrated cabin mass is established, and the direct integration method is used to solve the nonlinear differential equations of system vibration, which are obtained through Lagrange's equation. Then, the time domain responses of the flexible main beam, payload angle, and cabin vibration are obtained. The influences of the trolley running speed, quality of the payload, and quality and position of the cabin on the vibration of the main beam and payload angle are analyzed. The results indicate that the amplitude of the main beam is directly proportional to the quality of the trolley, payload, and cab; the position of the cabin is closer to the mid-span; the amplitude of the main beam is larger; the structural damping has some influence on the vibration of the main beam; and the swing angle of the payload is related to the maximum running speed of the trolley, acceleration time, and length of the wire rope. In order to reduce the vibration of the main beam and cabin, the connection stiffness of the cabin should be ensured during installation.

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Section: Description Of Vibrationmentioning

confidence: 99%

Nonlinear Vibration of Ladle Crane due to a Moving Trolley

Xin

et al. 2018

Mathematical Problems in Engineering

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“…This phenomenon is more pronounced the The results shown here have been based on a moving point force theoretical model. Some authors (Michaltsos, 2002) suggest that two axles/forces have more significant and important impact on the variation of displacement and strain due to varying speed. Hence, the investigation of the effect of more complex forms of loading, including heavy highspeed trains that could lead to significant strain rates, needs to receive attention.…”

Section: Discussionmentioning

confidence: 99%

Structural analysis of bridges with time-variant modulus of elasticity under moving loads

Aied¹,

González²

2012

Bridge Maintenance, Safety, Management, Resilience and Sustainability

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“…The effects of moving loads on the dynamics of the structures have been widely studied in literature, for example, (Dehestani et al, 2009;Lee, 1996;Michaltsos, 2002;Niaz and Nikkhoo, 2015;Omolofe and Oni, 2015;Wang, 2009) have investigated the subject. For the application to the bridge engineering (Michaltsos et al, 1996) have studied the effect of accelerating vehicles on the bridge beams, considering highway bridges and high speed rail road construction.…”

Section: Introductionmentioning

confidence: 99%

Tip Deflection Determination of a Barrel for the Effect of an Accelerating Projectile Before Firing Using Finite Element and Artificial Neural Network Combined Algorithm

Koç

Esen

Çay

2016

Lat. Am. j. solids struct.

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For realistic applications, design and control engineers have limited modelling options in dealing with some vibration problems that hold many nonlinearity such as non-uniform geometry, variable velocity loadings, indefinite damping cases, etc. For these reasons numerous time consuming experimental studies at high costs must be done for determining the actual behaviour such nonlinear systems. However, using advantages of multiple computational methods like Finite Element Method (FEM) together with an Artificial Intelligence (ANN), many complicated engineering problems can be handled and solved to some extent. This study, proposes a new collective method to deal with the nonlinear vibrations of the barrels in order to fulfil accurate shooting expectancy. Using known analytical methods, in practical, to determine dynamic behaviour of the barrel beam is not possible for all conditions of firing that include numerous varieties of ammunition for different purposes, and each projectile of different ammunition has different mass and exit velocity. In order to cover all cases this study proposes a new method that combines a precise FEM with ANN, and can be used for determining the exact dynamic behaviour of a barrel for some cases and then for precisely predicting the behaviour for all other possible cases of firing. In this study, the whole nonlinear behaviour of an antiaircraft barrel were obtained with 3.5% accuracy errors by ANN trained by FEM using calculated analysis results of ammunitions for a particular range. The proposed FEM-ANN combined method can be very useful for design and control engineers in design and control of barrels in order to compensate the effect of nonlinear vibrations of a barrel for achieving a higher shooting accuracy; and can reduce high-cost experimental works.

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Dynamic Behaviour of a Single-Span Beam Subjected to Loads Moving With Variable Speeds

Cited by 91 publications

References 15 publications

Nonlinear Vibration of Ladle Crane due to a Moving Trolley

Nonlinear Vibration of Ladle Crane due to a Moving Trolley

Structural analysis of bridges with time-variant modulus of elasticity under moving loads

Tip Deflection Determination of a Barrel for the Effect of an Accelerating Projectile Before Firing Using Finite Element and Artificial Neural Network Combined Algorithm

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