Finite element simulation device and method for local structure instability of high-speed EMU car body
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: 2018-04-06
CRRC QINGDAO SIFANG CO LTD
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These calculated load cases cannot evaluate the safety of the car body after the car body is dented
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[0054] The present invention will be further explained with reference to the drawings and embodiments:
[0055] In this embodiment, the finite element simulation device and method for local structural instability of the high-speed EMU car body adopts the existing software Hyperworks as the basis of human-computer interaction to form this scheme, but other similar finite element analysis software can also support the original Device and application of this method.
[0056] 1. Establish the finite element model of the car body structure in the hypermesh module of Hyperworks software.
[0057] 1.1. Set material parameters
[0058] The car body structure adopts aluminum alloy material, and the 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: image 3 Shown.
[0059] 1.2, set unit properties
[0060] Based on the car body design drawings and data, assign attribute va...
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Provides a finite element simulation device and method for local structural instability of a high-speed EMU car body. By adopting linear buckling analysis and finite element simulation methods, the car body structure is intact and the defects such as local profile depressions or protrusions are simulated, and the EMU is analyzed. The critical load force of the local instability of the structure guides the application of tooling, adjustment process and welding parameter setting in the process of manufacturing the current vehicle to avoid waste and potential safety hazards. The present invention adopts the human-computer interaction device, first builds a model according to the drawing of the car body, establishes a simulated concave part in the part of the car body; establishes the boundary constraints of the car body, linearly synthesizes the maximum vertical load and compression load of the car body, defines the modal frequency of the car body, Establish the static load and linear buckling analysis working conditions, then carry out the simulation analysis of the vehicle body structure instability, calculate the critical buckling coefficient, and obtain the maximum load that can be applied; if the critical buckling coefficient is greater than or equal to 1, it is determined that the part is reliable; if the critical buckling coefficient If it is less than 1, it is determined that this part needs to be reinforced.
Description
Technical field [0001] The invention belongs to the field of high-speed motor cars, and specifically relates to the design of the car body structure, and is especially used for structural instability analysis of the car body safety after the car body is dented. Background technique [0002] The simulation analysis of the EMU car body structure mainly refers to the relevant strength standards, such as Japanese standard JIS E7105: 2006, European standard EN12663: 2010 and the 200-kilometer strength temporary regulations, to calculate and analyze the strength and rigidity of the car body structure. These calculated load conditions cannot evaluate the safety of the car body after the car body is dented. Therefore, the vehicle body evaluation requires structural instability analysis. Summary of the invention [0003] A finite element simulation device and method for local structural instability of high-speed EMU car bodies is provided. By adopting finite element simulation methods, th...
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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