Design method for bearing type energy absorption structure of railway vehicle
An energy-absorbing structure and rail vehicle technology, applied in the field of rail vehicles, can solve problems such as low efficiency and low performance, and achieve the effect of improving energy absorption characteristics and solving low efficiency and low performance problems
Active Publication Date: 2021-09-07
CENT SOUTH UNIV
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[0005] The purpose of the present invention is to disclose a design method of a load-bearing energy-absorbing structure of a rail vehicle, so as to solve the problem of the arrangement of energy-abs
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Embodiment 1
[0030] This embodiment discloses a design method for a load-bearing energy-absorbing structure of a rail vehicle, referring to Figure 1 to Figure 6 , mainly including the following aspects:
[0031] 1. The load-bearing energy-absorbing structure of the subway head car is composed of three parts: the front support area, the crush area and the rear support area. The crush area is designed using the HCA (Hybrid Cellular Automata, Hybrid Cellular Automata) topology optimization method To optimize the topology of the crushed area, unlike the equivalent static load method, the advantage of the hybrid cellular automata is that it eliminates the need for an external conversion between the dynamic response and the static response, and can be effectively controlled by a local optimization control algorithm. Solve the checkerboard phenomenon in optimization problems. Therefore, the crushing energy-absorbing area is taken as the design domain, and the hexahedral grid is used to discrete...
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The invention relates to the technical field of railway vehicles, and discloses a design method for a bearing type energy absorption structure of a railway vehicle, so as to solve the problems of low efficiency and low performance caused by continuous trial and error and repeated analysis on the arrangement of energy absorption beams in a crushing area of the bearing type energy absorption structure manually. The method includes the steps that the bearing type energy absorption structure is divided into a front supporting area, a crushing area and a rear supporting area; the crushing area is taken as a design domain, the design domain is modeled by an entity unit, a front support area and a rear support area through a shell unit, the model is imported into Ls-Tasc software integrated with a hybrid cellular automaton method, and topological optimization is carried out on the crushing area by adopting an HCA topological optimization method; a topological optimization result is analyzed, the number of longitudinal beams in a crushing area and material distribution of the longitudinal beams are determined according to the most direct and most effective paths of force transmission, and finally, the energy absorption characteristic of the longitudinal beams can be improved by adopting methods of dividing square tubes of the longitudinal beams into a multi-cell structure and/or filling materials to form a sandwich structure and the like.
Description
technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a design method for a load-bearing energy-absorbing structure of a rail vehicle. Background technique [0002] With the rapid development of the rail transit industry, the traffic volume continues to increase, the quality of train maintenance is large, and the running speed is also constantly improving. Once a collision accident occurs, it will definitely bring serious economic losses and casualties. Therefore, the safety of train operation is inevitable. will be highly valued by people. Due to the variety of reasons for collision accidents, only active safety protection cannot completely avoid train accidents. Therefore, the passive safety of rail transit vehicles is given higher expectations and requires more precise design. [0003] When designing a vehicle for crashworthiness, in addition to installing energy absorbing devices at the corresponding parts at both ends of...
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Login to View More IPC IPC(8): G06F30/15G06F30/17G06F30/23G06F111/04G06F113/26G06F119/14
CPCG06F30/15G06F30/17G06F30/23G06F2111/04G06F2113/26G06F2119/14Y02T90/00
Inventor 谢素超杜炫锦冯哲骏井坤坤马闻
Owner CENT SOUTH UNIV