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A Model Simplification Method for Multi-vehicle Collision Simulation of Railway Trains

A model simplification and multi-vehicle technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as high computer performance requirements, large storage space for models and calculation results, and impact on analysis efficiency

Active Publication Date: 2015-10-14
CENT SOUTH UNIV
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Problems solved by technology

[0004] The models in the prior art are large-scale, especially the number of units and nodes is large, the calculation time is long, and the requirements for computer performance are high. The model and calculation results require a large storage space, which greatly affects the analysis efficiency.

Method used

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  • A Model Simplification Method for Multi-vehicle Collision Simulation of Railway Trains
  • A Model Simplification Method for Multi-vehicle Collision Simulation of Railway Trains
  • A Model Simplification Method for Multi-vehicle Collision Simulation of Railway Trains

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Embodiment Construction

[0027] A model simplification method for multi-vehicle collision simulation of railway trains. Taking a finite element car body model of a high-speed train as the research object, the car body is simplified. The specific simplification steps are as follows:

[0028] (1) Firstly, carry out the collision analysis between the single vehicle (the head vehicle and the middle vehicle) and the ideal rigid wall at a series of speed levels (such as 5m / s, 7.5m / s, 10m / s, 15m / s, etc.), and analyze the vehicle body Parts that do not undergo plastic deformation (recoverable elastic deformation is allowed), such as figure 1 and figure 2 The middle part shown, extract this part, and calculate its total weight and center of gravity position;

[0029] (2) Use a mass point m for the middle part of the car body analyzed in (1) 1 and m 2 Instead, the mass point m 1 and m 2 The position of is the center of gravity of the simplified part of the head car and the middle car, and the mass point m...

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Abstract

The invention relates to a method of simplifying a model of collision simulation for multiple railway trains, in particular to a dynamic nonlinear large-deformation finite element method. According to the method, unit cars forming a railway train are simplified; each unit car comprises a head and a middle car, the head and the middle car are assembled on the basis of a simplified car model, and a finite element model for eight grouped trains is established. The method has the advantages that model scale is simplified greatly, computing time is shortened, computers with ordinary performance can also be used for analysis and solution, storage space is saved greatly, and analysis efficiency is improved greatly.

Description

technical field [0001] The invention relates to a model simplification method for multi-vehicle collision simulation of railway trains. Background technique [0002] With the development of railway transportation and the continuous improvement of train operating speed, people pay more and more attention to the safety of train operation. Although the probability of collision accidents of railway vehicles is relatively small, trains running at high speed have greater initial kinetic energy. , once a collision occurs, the loss will be extremely huge. Railway trains are generally composed of multiple carriages. When a train collision occurs, the collision is different from the collision of a single vehicle. The collision process is often the coupling collision process of multiple vehicles. When the two train end cars collide with each other, The cars behind will collide with the cars in front one after another. [0003] It can be seen that the collision process of trains is a ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 谢素超梁习锋许平姚松高广军姚曙光傅敏
Owner CENT SOUTH UNIV
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