Based on existing numerical calculation methods such as computational fluid dynamics, computational heat transfer, and computational acoustics, this study aims to investigate the aerodynamic, thermodynamic, and acoustic characteristics of ground transportation vehicles in response to the structural characteristics of existing experimental facilities, providing reference data for experimental research; Based on experimental data, numerical methods are used to provide guidance for the determination of experimental plans for various types of ground transportation vehicles; Through the construction and operation of numerical wind tunnels, predict the aerodynamic, aeroacoustic, and thermodynamic characteristics of various types of ground transportation vehicles, providing a foundation for exterior design and optimization control, and coupling with multidisciplinary optimization design and control schemes; By combining with multidisciplinary optimization design theory, multimodal and multi operating condition simulations are conducted on the optimization design and control schemes of various types of ground transportation vehicles to further optimize system performance and improve system reliability; We research new numerical calculation methods. On the basis of familiarizing oneself with existing numerical calculation methods, research (introduce) new numerical calculation methods to more accurately and quickly study the motion characteristics of various types of ground transportation vehicles.