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Rack rail bullet train floor lightweight design method on basis of bionic design

A lightweight design and flooring technology, applied in the field of rail transit, can solve problems such as the inability to provide a variety of optimized structural options, and achieve high vibration resistance, reduce time-consuming, and optimize size.

Active Publication Date: 2021-09-07
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the existing research optimizes the floor and extracts only one optimized structure, which cannot provide a variety of optimized structural options

Method used

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  • Rack rail bullet train floor lightweight design method on basis of bionic design
  • Rack rail bullet train floor lightweight design method on basis of bionic design
  • Rack rail bullet train floor lightweight design method on basis of bionic design

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Embodiment

[0038] A lightweight design method for the floor of rack trains combined with bionic design, such as figure 2As shown, it includes the following steps: analyze the loading condition of the floor, and select the extreme condition as the boundary condition for topology optimization. Define the design area and non-design area for floor topology optimization. The goal of the topology optimization is set to be the minimum strain energy and the maximum natural frequency of the first-order sagging, and the extrusion manufacturing constraint along the longitudinal direction is added to constrain the mass fraction of the design area. After the parameter setting is completed, the topology optimization calculation is carried out to obtain the topology configuration. Several bionic floor structures are obtained by performing bionic design according to the topological configuration. Parameterize the size of each bionic floor structure, analyze the sensitivity of each size to the floor q...

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Abstract

The invention discloses a rack rail bullet train floor lightweight design method on the basis of bionic design. The method comprises the following steps of: analyzing a loaded working condition of a floor, and selecting an extreme boundary condition; defining a design area; setting a topological optimization target to be the realization of minimum strain energy and maximum first-order vertical bending inherent frequency; calculating to obtain a topological configuration; performing bionic design according to the topological configuration to obtain a plurality of bionic floor structures; parameterizing the size of each bionic floor structure, analyzing the sensitivity of each size to floor key indexes, setting a plurality of size parameters with the highest sensitivity as optimization variables, and constructing a response surface; setting a size optimization target to be the realization of minimum mass, minimum maximum equivalent stress, minimum maximum vertical displacement and maximum first-order vertical bending inherent frequency, and performing multi-target response surface size optimization to obtain floor optimized structures; and analyzing and screening the floor optimized structures. On the basis that the comprehensive performance of the floor is improved, various optimized structure schemes can be provided.

Description

technical field [0001] The invention relates to the technical field of rail transit, and more specifically, to a lightweight design method for a floor of a cog rail train combined with bionic design. Background technique [0002] With the rapid development of the world's rail transit equipment and the integrated development of the transportation and tourism industries, vigorously developing the cog rail transit project meets the current major application needs of the country, and the lightweight of the cog rail vehicle body is the key to realizing the relatively One of the key factors for characteristics such as strong gradeability and comfort. Rack rail vehicle is a type of train used in mountainous scenic spots for sightseeing or transportation of auxiliary equipment in coal mines. The difference between its structure and traditional trains is that the bogie of the locomotive is equipped with a gear device. track engagement. Overseas, cog rail train technology has been w...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/23
CPCG06F30/15G06F30/23
Inventor 尹湘云陈瑞文殷勤殷国富
Owner SICHUAN UNIV
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