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High-speed train body local structure instability finite element simulation device and method

A high-speed EMU and car body structure technology, which is applied to the structural instability analysis of car body safety and the design field of car body structure, and can solve problems such as the inability to evaluate car body safety

Active Publication Date: 2015-07-08
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology

These calculated load cases cannot evaluate the safety of the car body after the car body is dented

Method used

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  • High-speed train body local structure instability finite element simulation device and method
  • High-speed train body local structure instability finite element simulation device and method
  • High-speed train body local structure instability finite element simulation device and method

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Embodiment Construction

[0054] Now in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0055] In this embodiment, the finite element simulation device and method for the local structure instability of the high-speed EMU car body adopt the existing software Hyperworks software as the basis of human-computer interaction to form this scheme, but other similar finite element analysis software can also support this Device and application of the method.

[0056] 1. Establish the finite element model of the car body structure in the hypermesh module of the Hyperworks software.

[0057] 1.1. Set material parameters

[0058] The car body structure adopts aluminum alloy material, and its corresponding material parameters are as follows: aluminum alloy material: Ε: 69000MPa; μ: 0.3, ρ: 2.7e-9t / mm3. Make the following settings in the material definition module: such as image 3 shown.

[0059] 1.2. Set unit properties

[0060] According to the design dr...

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Abstract

The invention provides a high-speed train body local structure instability finite element simulation device and method. By simulating train body structure completeness and defect conditions of local profile concave or protrusions through a linear buckling analysis and finite element simulation method, analyzing local instability critical load force of the train structure, and instructing tooling applying, working days off processes and welding parameter setting during existing train machining, waste and safety potential hazards are prevented. The method comprises using a man-machine interaction unit, building models according to train body drawings, and establishing simulation concave portions on the local train body portions; establishing train body boundary constraints, performing linear synthesis to obtain train body maximum vertical loads and compression loads, and defining train body mode frequencies, establishing static loads and linear buckling analysis work conditions; performing train body instability simulation analysis, and calculating critical buckling coefficients to obtain the maximum load that can be applied; determining that the portions are reliable if the critical buckling coefficients are larger than or equal to 1; determining that the portions need be reinforced if the critical buckling coefficients are smaller than 1.

Description

technical field [0001] The invention belongs to the field of high-speed trains, and in particular relates to the design of the car body structure, in particular to the structural instability analysis for the safety of the car body after the car body is sunken. Background technique [0002] The simulation analysis of the car body structure of the EMU mainly refers to the relevant strength standards, such as the Japanese standard JIS E7105: 2006, the European standard EN12663: 2010 and the 200 km strength provisional regulations, to calculate and analyze the structural strength and stiffness of the car body. These calculated load cases cannot evaluate the safety of the car body after the car body is dented. Therefore, the evaluation of the vehicle body requires structural instability analysis. Contents of the invention [0003] Provide a finite element simulation device and method for local structure instability of high-speed EMU car body, by using the finite element simula...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2111/04G06F2111/10G06F30/23G06F30/15G06F30/17G06F30/367G06F2111/20G06F2119/14
Inventor 赵红伟田爱琴马云双丁叁叁
Owner CRRC QINGDAO SIFANG CO LTD
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