Railway vehicle weight gravity center design optimization method and system based on multi-objective optimization

Abstract

The invention discloses a railway vehicle weight gravity center design optimization method based on multi-objective optimization. The method comprises the steps that a weight gravity center parameter table and an axle weight and wheel weight computation sheet are established, an optimization task model is established in optimization software on the basis, the vehicle body weight and vehicle body gravity center coordinates are used as optimization variables, the weights and gravity center coordinates of constituent parts are used as design variables, and axle weight deviations and wheel weight deviations are used as bound variables; a preset algorithm is applied to determine value ranges of the design variables and the bound variables and optimization indexes of the optimization variables; multi-objective optimization calculation is conducted on the optimization task model through a multi-objective optimization algorithm, and the weights and gravity center coordinates of the constituent parts after optimization are obtained. Weight and distribution optimization of the parts on a railway vehicle can be achieved, the lightweight design purpose is achieved, and meanwhile the utilization rate of space in a vehicle body is improved. the invention further discloses a railway vehicle weight gravity center design optimization system based on multi-objective optimization. The advantages of the method and the system are as mentioned above.

Description

technical field [0001] The invention relates to the technical field of rail vehicles and multi-objective optimization algorithms, in particular to a method for designing and optimizing the center of gravity of rail vehicles based on multi-objective optimization. The invention also relates to a design optimization system for center of gravity of rail vehicle weight based on multi-objective optimization. Background technique [0002] With the development of China's machinery industry, the rail vehicle design and manufacturing industry has become increasingly mature. [0003] For rail vehicles, the weight and center of gravity control of the vehicle system and components at all levels, the calculation of axle load, wheel load and unbalance rate are key steps in the design process, and domestic and foreign vehicle development companies attach great importance to it. The standards adopted internationally for the evaluation of calculation results are mainly IEC 61133 and DIN 5012...

AI Technical Summary

Problems solved by technology

Increased vehicle weight leads to increased energy consumption, increased wheel and rail wear, and increased costs, making it difficult to limit vehicle weight, axle load, and wheel weight within specified limits

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