A novel practical element is presented for simulating the vertical wheel-rail interaction (WRI) of vehicle-track-bridge (VTB) coupling systems. The WRI time- and location-varying, which makes simulation VTB system complicated. new simulates using a location dependent internal resisting force, enables finite (FE) model to remain unchanged in analysis. This capable nonlinear WRI, rail irregularity ‘additional’ displacement rail. extra caused by besides that interpolated from nodal...

This paper presents a modified numerical substructure method for simulating the dynamic response of vehicle–track–bridge (VTB) systems. The can be used to analyze large-scale VTB systems accurately and efficiently. Based on principle virtual work, equations motion are derived two separate subsystems, i.e. small-scale finely modeled coarsely meshed large main bridge subsystem using different level refinement. Different from conventional substructuring approaches, spans close vehicle in both...

Dynamic response analysis of a train–track–bridge (TTB) system is challenging task for researchers and engineers, partially due to the complicated nature wheel–rail interaction (WRI). When Newton’s method used solve implicit nonlinear finite element equations TTB system, consistent tangent stiffness (CTS) essential guarantee quadratic convergence rate. However, derivation software implementation CTS WRI require significant efforts. Artificial neural network (ANN) can directly obtain...

Consistent tangent stiffness plays a crucial role in delivering quadratic rate of convergence when using Newton’s method solving nonlinear equations motion. In this paper, consistent is derived for three-dimensional (3D) wheel–rail interaction element (WRI short) originally developed by the authors and co-workers. The algorithm has been implemented finite (FE) software framework (OpenSees paper) proven to be effective. Application examples wheelset light rail vehicle are provided validate...

Seismic isolation technology plays a crucial role in enhancing earthquake resistance and mitigating disasters for building structures. In this study, the ETABS analysis software V21.0.1 is utilized to establish numerical model of six-story steel reinforced concrete frame structure. Both time-history method response spectrum are employed calculate seismic under actions. The placement an layer on foundation from first fifth floor considered, with separate calculations conducted each scenario....

This paper presents a comprehensive study of the dynamic response analysis vehicle–bridge coupled systems, with detailed simulation methods for vehicles, bridges, and wheel–road coupling relationships. The entire system is carried out using open-source finite element platform OpenSees. A novel three-dimensional introduced to model interactions between wheel road nodes. facilitates precise computation responses within system, including both vehicle bridge behaviors, along interaction forces...

A numerical method is proposed for solving the layered stresses of overhead conductors and applied to analyze stress distribution LGJ-400/35 operating in high-altitude cold zone climatic conditions. The crucial achieving a dynamic increase line current, ensuring strength sag safety during periods peak power demand, preventing strand breakage caused by fatigue under long-term service Based on temperature field results, conductor determined through internal external force balance deformation...

Abstract The temperature field variation of overhead conductors in the operating environment Qinghai-Tibet Plateau is significant, causing stress on conductor wires to fluctuate with climate changes, leading fatigue and wire breakage. Conducting numerical simulation analysis this crucial for enhancing safety transmission lines. This paper establishes a algorithm solving radial distribution operation based two-dimensional steady-state heat balance theory. method applied heat-resistant...

Accurate calculation of temperature, stress, sag, and critical current (corresponding to temperature) operational overhead conductors is important for ensuring the strength sag safety lines. Based on 2D steady-state heat transfer equations, this article studies temperature fields cross section typical electrified establishes numerical simulation methods calculating layered temperature. Using algorithm, relationship between characteristics (e.g., tensile force) studied. The results are...

It is of significant importance to compute the exact thermal field operational conductors so as increase loading ampacity transmission line in a safe manner. This paper performs an accurate analysis for based on two-dimensional steady-state heat transfer control functions. A refined finite element model section conductor used, which considers main sources gains, loss and studies key factors affecting radial temperature distribution. typical aluminum steel reinforced (ACSR) studied using...

Accurate thermo-mechanical coupling analysis for operational conductors is important to guarantee satisfaction of the safety requirements, e.g., strength or safe distance sag. The paper presents a new method this analysis, i.e., calculating temperature fields using finite element based on which compute stress force equilibrium and compatibility conditions. A few crucial factors are considered better simulation real condition, including transverse deformation section due interaction forces...