Development and Application of a High-Performance Triangular Shell Element and an Explicit Algorithm in Opensees for Strongly Nonlinear Analysis

Lu, Xinzheng; Tian, Yuan; Sun, Chujin; Zhang, Shuhao

doi:10.32604/cmes.2019.04770

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…It is clear that the proper time advancement scheme is of utmost importance to choose when using explicit method. Due to its simplicity, the leap-frog method is popular to solve structural dynamics, by which second order accuracy can be guaranteed [26][27][28]. The concept of the leap-frog method is a halftime shift between the structural unknowns (acceleration, displacement and velocity).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional FSI Simulation by Using a Novel Hybrid Scaling – Application to the Tacoma Narrows Bridge

Szabó¹,

Györgyi

Kristóf

2020

Period. Polytech. Civil Eng.

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In this paper a novel fluid-structure interaction approach for simulating flutter phenomenon is presented. The method is capable of modelling the structural motion and the fluid flow coupling in a fully three-dimensional manner. The key step of the proposed FSI procedure is a hybrid scaling of the physical fields; certain properties of the CFD simulation are scaled, while those of the mechanical system are kept original. This kind of scaling provides a significant speedup, since the number of the costly CFD time steps can be remarkably reduced. The acceptable computational time makes it possible to consider complex engineering problems such as buffeting, vortex shedding or flutter of a bridge deck or a wing of an airplane.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional FSI Simulation by Using a Novel Hybrid Scaling – Application to the Tacoma Narrows Bridge

Szabó¹,

Györgyi

Kristóf

2020

Period. Polytech. Civil Eng.

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“…The flat elements that form the sections and the rest of the plates involved in the joint are discretised by shell elements, using the triangular element NLDKGT [3] with three nodes.…”

Section: Platesmentioning

confidence: 99%

Finite Element Analysis of Joints, Comparison of Results with the Component Method According to EN 1993‐1‐8:2005

Gómez

Assis

2022

ce papers

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Summary The current standards are based on the well‐known component method for the design of steel structure connections. This method proposes to analyse the joints as a set of more basic components. Its main drawback is the difficulty in extrapolating the method to perform the analysis of complex joints. As an alternative, it is possible to test the joints in the laboratory or to carry out finite element modelling. The purpose of this study is to compare the strength obtained on the basis of the Eurocode 3 criteria with the strength obtained from finite element models of two‐dimensional elements in order to validate a model which, a priori, is less accurate than the three‐dimensional element model.

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“…Figure 14a,b show the load-displacement curves for the cantilever with the lengths of 10 m and 12 m, respectively. For comparison purposes, the results from Lu et al [36] and Jeon et al [37] are also depicted in said figures. The results obtained from the presented numerical model match those obtained by Lu et al [36] and Jeon et al [37] and are reasonably close to the reference solutions.…”

Section: Cantilever Beam Exposed To End Momentmentioning

confidence: 99%

Rotation-Free Based Numerical Model for Nonlinear Analysis of Thin Shells

et al. 2021

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This paper presents a computationally efficient numerical model for the analysis of thin shells based on rotation-free triangular finite elements. The geometry of the structure in the vicinity of the observed triangular element is approximated through a controlled domain consisting of nodes of the observed finite element and nodes of three adjacent finite elements between which a second-order spatial polynomial is defined. The model considers large displacements, large rotations, small strains, and material and geometrical nonlinearity. Material nonlinearity is implemented by considering the von Mises yield criterion and the Levi–Mises flow rule. The model uses an explicit time integration scheme to integrate motion equations but an implicit radial returning algorithm to compute the plastic strain at the end of each time step. The presented numerical model has been embedded in the program Y based on the finite–discrete element method and tested on simple examples. The advantage of the presented numerical model is displayed through a series of analyses where the obtained results are compared with other results presented in the literature.

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Development and Application of a High-Performance Triangular Shell Element and an Explicit Algorithm in Opensees for Strongly Nonlinear Analysis

Cited by 8 publications

References 18 publications

Three-dimensional FSI Simulation by Using a Novel Hybrid Scaling – Application to the Tacoma Narrows Bridge

Three-dimensional FSI Simulation by Using a Novel Hybrid Scaling – Application to the Tacoma Narrows Bridge

Finite Element Analysis of Joints, Comparison of Results with the Component Method According to EN 1993‐1‐8:2005

Rotation-Free Based Numerical Model for Nonlinear Analysis of Thin Shells

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