Motor train unit train body design method based on structure topological optimization

Abstract

The invention provides a motor train unit train body design method based on structural topological optimization, which breaks through the traditional structural design method based on sensitivity analysis and proxy model of the existing train body, and implements the structural topological optimization thought in the train body structural design. The brand new design method for the train body of the motor train unit with the topological optimized structure is invented by researching the aspects of the size, the shape and the topological comprehensive optimization design of the train body structure, and the weight of the train body is reduced to the maximum extent on the premise that the performance indexes such as the strength, the modality and the fatigue of the train body are not changed.

Description

technical field [0001] The invention relates to the field of rail passenger car bodies, in particular to a method for car bodies based on structural topology optimization. Background technique [0002] At present, the design optimization of the rail car body structure is mainly based on sensitivity analysis, proxy model and other methods to optimize the shape and size of the structure. On the other hand, corresponding adjustments and optimizations are made to the profile sections and underframe side beams and other car body structure details. However, the existing size and shape optimization design has limitations such as high dependence on the design prototype, small design variables, and limited space for performance optimization. Therefore, it is urgently needed The new structural design method breaks through the design limit of size and shape optimization, further improves the lightweight design level of rail vehicle body structure, and optimizes the overall performance ...

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Problems solved by technology

[0003] In recent years, topology optimization technology has gradually expanded to many other fields including fluid, acoustics, electromagnetics, optics, etc. because it does not rely on the experience of engineers and designers, and can also obtain high-performance structural design. Lightweight technology has become the main development trend of high-speed trains in the future. Although the research on the optimization of rail vehicle body structure is relatively extensive at home and abroad, it still mainly focuses on size / parameter optimization algorithms. For the design method of car body structure based on topology optimization, etc. There is still insufficient research on

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