Analysis and Optimization of Thermal Insulation Performance of High-Speed Train Body
Taking a high-speed train as an example,the heat transfer coefficient of the whole vehicle is 0.948 W/(m2·K)by finite element simulation of four typical cross-sectional extrusions of the car body,and the error is only 8.8%compared with the experimental value of the same type of car body.In the analysis of the typical flat wall structure and cold bridge structure of the car body,it was found that the air in the cavity of the aluminum profile did not play a significant role in the thermal insulation due to the thermal short circuit in the internal web of the profile.By reducing the number of webs and replacing the webs with CFRP materials to optimize the thermal insulation performance of the load-bearing structure,the simulation results show that the reduction of a pair of webs has no great effect on the thermal resistance,and replacing them with CFRP materials reduces the heat transfer coefficient of the flat wall structure by 52%and the heat transfer coefficient of the cold bridge structure by 63%.
万方数据
维普
