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Locomotive body light weight optimization method

An optimization method and lightweight technology, applied in the field of rail vehicles, can solve problems such as the inability to realize the optimization calculation of multi-design variables, multi-constraint variables and multi-objective variables of the whole vehicle.

Active Publication Date: 2016-05-04
ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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AI Technical Summary

Problems solved by technology

It is necessary to carry out lightweight optimization design for the entire locomotive body, and the traditional lightweight calculation method cannot realize the optimization calculation of multiple design variables, multiple constraint variables, and multiple objective variables for the whole vehicle

Method used

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  • Locomotive body light weight optimization method

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Embodiment Construction

[0034] The Chinese and English symbol meanings of the present invention are explained as follows:

[0035] APDL: The full name is ANSYS Parametric Design Language, which is the parametric design language of ANSYS software.

[0036] task: a process component in isight software.

[0037] DOE: Renamed from the process component task. DOE is Design of Experiments, which is DesignofExperiments in English. The purpose is to determine the best combination of parameters and analyze the relationship and trend between input parameters and output parameters.

[0038] dataexchanger, oscommand, parameter, dataexchanger, calculatestress: application components in isight software.

[0039] parameter: Renamed from the application component dataexchanger.

[0040] calculatestress: Renamed from the application component oscommand.

[0041] getstress: Renamed from the application component dataexchanger.

[0042] calculatefreq+mass: Renamed from the application component oscommand.

[0043] ...

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Abstract

The invention discloses a locomotive body light weight optimization method. The method comprises following steps: A, writing a first APDL script file for parameterizing the unit thickness of a shell element assembly; B, writing a second APDL script file for extracting and writing the maximum stress of a node assembly; C, writing a third APDL script file, writing a fourth APDL script file, writing a fifth APDL script file and writing a sixth APDL script file; D, constructing a task process; E, carrying out DOE calculation; F, taking the design parameters corresponding to sensitivity values participating in summation to participate in optimization calculation; G, taking the values of a set of design parameters as the initial values of each design parameter in the optimization calculation, wherein the set of design parameters satisfies a strength and stiffness constraint condition and enables a target value to be least; H, carrying out the optimization calculation; and I, taking the solution firstly satisfying all working condition demands as the result of the optimization calculation. The method of the invention is good in optimization effect; the bearing capability of each component can be realized to the utmost extent; and the locomotive body weight is greatly reduced.

Description

technical field [0001] The invention belongs to the field of rail vehicles, in particular to a method for optimizing the weight of a locomotive body. Background technique [0002] The light weight of the car body is the goal pursued by the design of the locomotive body. The existing lightweight design of the locomotive body is based on the optimization calculation of finite element calculation software such as ANSYS. ANSYS is a widely used CAE (Computer Aided Engineering, computer aided engineering) analysis software. optimize. [0003] Due to the limitations of the ANSYS software itself, only a single objective function and a small number of design variables and constraint variables can be defined, and there are few types of optimization algorithms, so ANSYS is only suitable for small zeros with fewer design variables and constraint variables and a single objective function. Optimal calculation of components. When there are too many design variables and constraint varia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23G06F2113/28
Inventor 黄学君杨颖蒋忠城何安清袁文辉段华东刘晓波梅曦陈建林杜求茂
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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