车身外鼓程度对侧风行驶稳定性影响的研究  

A Study on Influence of Vehicle Body Flare Degree on Crosswind Stability

作　　者：段金金 方存光[1] Duan Jin-jin;Fang Cun-guang(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学汽车与交通学院,辽宁沈阳110159

出　　处：《内燃机与配件》2024年第13期37-39,共3页Internal Combustion Engine & Parts

摘　　要：合理的车身外鼓程度有助于实现车身周围的气压分布平衡,降低侧向气流对车辆行驶安全的影响,从而提高车辆在侧风中的行驶稳定性。通过改变汽车的车身外鼓程度,使用Fluent软件对不同外鼓程度的汽车模型进行数值模拟获得气动六分力系数,再使用Simlink进行车辆侧风运动学仿真。结果显示:汽车车身的外鼓程度与车辆侧风行驶的稳定性有明显相关性,外鼓系数在0.005-0.03范围内,数值越高,车辆在侧风中行驶的稳定性越好。Reasonable body flare can help achieve a balanced distribution of air pressure around the vehicle and reduce the impact of crosswind on driving safety,thereby improving the stability of the vehicle in crosswinds.By changing the body flare degree of the car and using Fluent software for numerical simulation of car models with different flare degrees to obtain aerodynamic six-force coefficients,and then using Carsim software for vehicle crosswind kinematics simulation,the results show that there is a significant correlation between the body flare degree of the car and the stability of the vehicle during crosswind driving.The higher the numerical value of the body flare coefficient within the range of 0.005-0.03,the better the stability of the vehicle during crosswind driving.

关 键 词：汽车外形设计 车身外鼓程度 侧风行驶稳定性 计算机仿真 

分 类 号：U462[机械工程—车辆工程]