CAJ | 학술논문

为研究车‐路系统耦合作用下汽车行驶平顺性，运用车辆动力学仿真软件CarSim建立整车模型，并采用傅里叶逆变换法对 GB7031中规定的A～D级路面进行数值仿真与验证，分析了车辆以不同速度行驶在不同等级路面上的加速度和车轮法向动载系数。结果表明：①随着路面等级的降低和车辆行驶速度的提高，车身加速度显著增大，由50 km／h、A级路面上的0．2599 m／s2变化为120 km／h、D级路面上的1．6889m／s2，增加了5．5倍，车辆行驶平顺性下降；②车‐路耦合产生的动载作用受路面工况和车速的影响也较大，由50 km／h、A级路面上的0．0833变化为120 km／h、D级路面上的0．7754，增大8．3倍。路面等级越低，车速越高，动载系数越大，对路面的破坏作用越严重。
위연구차‐로계통우합작용하기차행사평순성，운용차량동역학방진연건CarSim건립정차모형，병채용부리협역변환법대 GB7031중규정적A～D급로면진행수치방진여험증，분석료차량이불동속도행사재불동등급로면상적가속도화차륜법향동재계수。결과표명：①수착로면등급적강저화차량행사속도적제고，차신가속도현저증대，유50 km／h、A급로면상적0．2599 m／s2변화위120 km／h、D급로면상적1．6889m／s2，증가료5．5배，차량행사평순성하강；②차‐로우합산생적동재작용수로면공황화차속적영향야교대，유50 km／h、A급로면상적0．0833변화위120 km／h、D급로면상적0．7754，증대8．3배。로면등급월저，차속월고，동재계수월대，대로면적파배작용월엄중。
In order to study the vehicle ride comfort under the characteristic of coupling vibration between vehicle and pavement ,a full‐car model was built by using software CarSim .Road grade A~D defined in GB7031 were also simu‐lated and verified numerically by using inverse Fourier transform .The acceleration rates and coefficient of tire radial dy‐namic forces under different speeds and road grades were computed .The simulation results indicate that 1) vehicle acceler‐ation rates significantly increased with decrease of road grades and increase of vehicle speed .The acceleration rate changed from 0 .259 9 m/s2 at the speed of 50 km/h on grade A road to 1 .688 9 m/s2 at the speed of 120 km/h on grade D road , which increased approximately 5 .5 times .Vehicle ride performance becomes worse .2) The effect of road roughness and vehicle speed on the dynamic force was significant .The dynamic force coefficient (DFC) produced by vehicle changed from 0 .083 3 at the speed of 50 km/h on grade A road ,to 0 .775 4 at the speed of 120 km/h on grade D road ,an increase of around 8 .3 times .The lower the road grade and the higher the vehicle speed ,the greater the dynamic force coefficient which will cause more serious damaging effects on the road .