Application of 3D Solid Modeling and Simulation Programs to a Bridge Structure

Kettil, Per; Wiberg, Nils‐Erik

doi:10.1007/s003660200014

Cited by 14 publications

(8 citation statements)

References 5 publications

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“… Three cantilever beams, one for each section considered, were built using a 3D modeler. These modelers are more natural since, and represent real structures with 3D solid elements [9].…”

Section: = ℎ 3 12mentioning

confidence: 99%

Comparison between Analytical Equation and Numerical Methods for Determining Shear Stress in a Cantilever Beam

et al. 2018

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A three meter-length cantilever beam loaded with a concentrated load at its free end is studied to determine shear stresses. In the present study, three cross sections are considered: rectangle (R); I, and T. The study presents a comparison of maximum shear stresses obtained by means of two methods: classical analytical equation derived by Collingnon, and finite element method (FEM) software. Software programs ANSYS and SAP2000 were used. The results show difference between the maximum shear stresses obtained by the analytical equation and the software, being the last is always higher. The average differences for ANSYS and SAP2000, independently of the cross section, were 12.76% and 11.96%, respectively. Considering these differences, correction factors were proposed to the classical analytical formula for each cross section case to obtain more realistic results. After the correction, the average differences decrease to 1.48% and 4.86%, regardless of the cross section shape.

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Section: = ℎ 3 12mentioning

confidence: 99%

Comparison between Analytical Equation and Numerical Methods for Determining Shear Stress in a Cantilever Beam

et al. 2018

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“…It can be demonstrated that if we have a coincidence between the beam and the 3D models shape functions, in addition to very fine meshes and a non-lumped 3D mass matrix, then we can write: (17) as well as . Taking into account that is the beam solution which fulfills , then Eq.…”

Section: Optimal Strategy If the Orthogonality Of Vectors And Is Satimentioning

confidence: 99%

A beam to 3D model switch for rotor dynamics applications

Tannous

Cartraud

Dureisseix

et al. 2015

Engineering Structures

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A typical accidental slowing down of a turbine presents a rotor-stator contact that may be limited to a small interval of the whole simulation period. Such engineering problems involving slender structures with local or non-linear phenomena restricted in time require a 3D model for a better understanding of the local or non-linear phenomena, whereas a simplified beam model can be sufficient for simulating the linear phenomena occurring for a long period of time. This paper proposes a strategy that enables to switch from a beam model to a 3D model during a transient rotor dynamics analysis, and thus, allows to reduce the computational cost while preserving a good accuracy. The simulation starts with a beam model, and at the switch instant ts, the 3D solution is initialized as the sum of a displacement corresponding to the classical Timoshenko kinematics assumption and a 3D correction that accounts, for instance, for cross-section deformation. This is performed on three consecutive time steps (the switch instant, the previous and the following steps), thus allowing to make velocity and acceleration corrections. The method is proved to be energetically sound and is validated through comparisons with a reference solution corresponding to the 3D model solution computed during all the simulation.

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“…Many studies have been published in the past on the safety of cranes under static and dynamic loading (Buffington 1985;Auering and Troger 1987;Moustafa and Abou-ElYazid 1996;Demirsoy 1998;Kettil and Wiberg 2002). Modelling the crane bridge structure with solid finite elements for finding the displacements and stress distribution has been investigated in Demirsoy (1998); Demirsoy and Zeren (2006).…”

Section: Modelling Of the Overhead Cranementioning

confidence: 99%

Applied soft computing for optimum design of structures

Lagaros

Papadrakakis

2011

Struct Multidisc Optim

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In this study a critical assessment of three metaheuristic optimization algorithms, namely differential evolution, harmony search and particle swarm optimization, is performed with reference to their efficiency and robustness for the optimum design of real-world structures. Furthermore, a neural network based prediction scheme of the structural response, required to assess the quality of each candidate design during the optimization procedure, is proposed. The proposed methodology is applied to an overhead crane structure using different finite element simulations corresponding to a solid discretization as well as mixed discretizations with shell-solid and beam-solid elements. The number of degrees of freedom (dof) resulted for the simulation of the structural response varies in the range of 60,000 to 1,400,000 dof leading to highly computational intensive problems.

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Application of 3D Solid Modeling and Simulation Programs to a Bridge Structure

Cited by 14 publications

References 5 publications

Comparison between Analytical Equation and Numerical Methods for Determining Shear Stress in a Cantilever Beam

Comparison between Analytical Equation and Numerical Methods for Determining Shear Stress in a Cantilever Beam

A beam to 3D model switch for rotor dynamics applications

Applied soft computing for optimum design of structures

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