A moving mesh method to deal with cable structures subjected to moving loads and its application to the catenary–pantograph dynamic interaction

Jiménez-Octavio, Jesús R.; Carnicero, Alberto; Sanchez-Rebollo, C.; Such, M.

doi:10.1016/j.jsv.2015.03.051

Cited by 30 publications

(15 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In combination with a vehicle-track model, the effect of random track irregularities on the pantograph-catenary contact force is studied [39]. In order to improve the solution efficiency, Carnicero et al [40] also propose a moving mesh method for pantograph-catenary model. Compared with the traditional method, the computational cost is significantly decreased.…”

Section: Finite Element Modelmentioning

confidence: 99%

“…Since the catenary span is long and the dynamic response precision is high, relatively dense meshing is usually adopted, which leads to low computation speed and high simulation cost. Carnicero et al [40] proposed a dynamic grid implementation scheme for moving loads, whose application to the dynamic simulation of pantograph-catenary system can greatly improve the efficiency. Therefore, the efficient numerical methods for the nonlinear catenary system should be improved according to different working conditions, such as environment wind field and double pantograph operation.…”

Section: Dynamic State Evaluation Based On Time-frequency Analysismentioning

confidence: 99%

See 1 more Smart Citation

Advances of research on high-speed railway catenary

Liu

Song

et al. 2017

J. Mod. Transport.

View full text Add to dashboard Cite

The interaction between the catenary and pantograph is one of the most crucial factors that determine the train operation in high-speed railway. The bad state of catenary is able to directly influence the power supply safety of traction power system. In this paper, four aspects on the catenary research of high-speed railway are reviewed in detail, namely the solution methods for catenary equilibrium state, the dynamic modeling methods of catenary, non-contact detection methods of catenary, and the static and dynamic evaluation methods of catenary. In addition, their recent advances are described. For the low solution accuracy of the initial equilibrium state of catenary, the structure finding method with multi-objective constraint and nonlinear finite element procedure are introduced to solve the problem. For the catenary's dynamic modeling, considering the influence of environmental wind on the catenary, environmental wind simulations and wind tunnel tests are used to obtain the aerodynamic coefficients and build the wind field along the catenary for analysis of its wind vibration characteristics. In order to improve the detection accuracy of non-contact detection for the catenary, the deep learning theory and real-time detection algorithms should be adopted in the future. In view of the lack of dynamic assessment method for the catenary, the modern spectrum evaluation, timefrequency analysis, big data technology and their combinations will be the important means for future catenary evaluation.Keywords High-speed railway Á Modeling of catenary Á Simulation of catenary Á Detection of catenary Á Evaluation of catenary

show abstract

Section: Finite Element Modelmentioning

confidence: 99%

Section: Dynamic State Evaluation Based On Time-frequency Analysismentioning

confidence: 99%

Advances of research on high-speed railway catenary

Liu

Song

et al. 2017

J. Mod. Transport.

View full text Add to dashboard Cite

show abstract

“…Van et al [23] introduced catenary geometry irregularity, catenary wear, and transient aerodynamic forces into pantograph-catenary dynamic simulations. A moving mesh method was presented by JimenezOctavio et al [24] to analyze the dynamic interaction of the pantograph-catenary system. Gregori et al [25] presented a highly computational-cost-saving approach (Offline/Online approach) to simulate the pantograph-catenary dynamic interaction.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Method Based on the Parametric Variational Principle for Simulating the Dynamic Behavior of the Pantograph‐Catenary System

Gao

Zhong

2018

Shock and Vibration

View full text Add to dashboard Cite

Based on the finite element method (FEM), the parametric variational principle (PVP) is combined with a numerical time-domain integral method to simulate the dynamic behavior of the pantograph-catenary system. Based on PVP, formulations for the nonlinear droppers in the catenary and for the contact between the pantograph and the contact wire are proposed. The formulations can accurately determine the tension state or compression state of the nonlinear droppers and the contact state between the pantograph and the contact wire. Based on the periodicity of the catenary and the precise integration method (PIM), a numerical timeintegration method is developed for the dynamic responses of the catenary. For this method, the matrix exponential of only one unit cell of the catenary is computed, which greatly improves the computational efficiency. Moreover, the validation shows that the formulations can compute the contact force accurately and represent the nonlinearity of the droppers, which demonstrates the accuracy and reliability of the proposed method. Finally, the dynamic behaviors of the pantograph-catenary system with different types of catenaries are simulated.

show abstract

“…Computational cost is always an issue if simulations have to be performed several times as occurs in optimization procedures. In the catenary-pantograph field some authors have proposed simplified catenary models [9], modal decomposition approaches [10], models based on moving meshes [11] or even a priori model order reduction techniques [12] in order to reduce the computational effort. However, the common feature of all these approaches is that they are less accurate than the full FE models.…”

Section: Introductionmentioning

confidence: 99%

Fast simulation of the pantograph–catenary dynamic interaction

Gregori

Tur

Nadal

et al. 2017

Finite Elements in Analysis and Design

View full text Add to dashboard Cite

Simulation of the pantograph-catenary dynamic interaction has now become a useful tool for designing and optimizing the system. In order to perform accurate simulations, including system non-linearities, the Finite Element Method is commonly employed combined with a time integration scheme, even though the computational time required may be longer than with the use of other simpler approaches. In this paper we propose a two-stage methodology (Offline/Online) which notably reduces the computational cost without any loss in accuracy and makes it possible to successfully carry out very efficient optimizations or even Hardware in the Loop simulations with real-time requirements.

show abstract

A moving mesh method to deal with cable structures subjected to moving loads and its application to the catenary–pantograph dynamic interaction

Cited by 30 publications

References 31 publications

Advances of research on high-speed railway catenary

Advances of research on high-speed railway catenary

A Numerical Method Based on the Parametric Variational Principle for Simulating the Dynamic Behavior of the Pantograph‐Catenary System

Fast simulation of the pantograph–catenary dynamic interaction

Contact Info

Product

Resources

About