CAJ | 학술논문

为了研究重型汽车的平顺性问题，运用两端自由等截面弹性梁理论，建立了车体刚体与弹性合成的4自由度1／2重型汽车振动模型。应用频域分析方法推导了基于前轮的系统频率响应特性和响应量的频率响应特性，确定了响应量的功率谱密度和均方根值。基于车体刚体与弹性合成模型和刚性模型，采用 Matlab 开发了相应的重型汽车平顺性仿真程序。通过与刚体模型的平顺性仿真结果对比表明：车体的弹性对重型汽车的平顺性影响很大，在重型汽车的平顺性研究中不能忽略。
위료연구중형기차적평순성문제，운용량단자유등절면탄성량이론，건립료차체강체여탄성합성적4자유도1／2중형기차진동모형。응용빈역분석방법추도료기우전륜적계통빈솔향응특성화향응량적빈솔향응특성，학정료향응량적공솔보밀도화균방근치。기우차체강체여탄성합성모형화강성모형，채용 Matlab 개발료상응적중형기차평순성방진정서。통과여강체모형적평순성방진결과대비표명：차체적탄성대중형기차적평순성영향흔대，재중형기차적평순성연구중불능홀략。
In order to study the ride comfort of heavy-duty automobile,a 4 DOF vibration model of the half heavy-duty automobile based on the rigid-elastic synthesis of vehicle body was established by using the elastic theory of beams of equal cross sections with both free ends.Frequency response characteristics of the system and response variables based on the front wheel part were derived by the analysis method in frequency domain.The power spectral density and the root mean square value of response variables were determined.The corresponding simulation programs for the ride comfort of heavy-duty automobile were developed based on the rigid-elastic synthesis model and the rigid model of vehicle body with Matlab.By comparing the simulation results of both models,it is shown that vehicle body flexibility has a great impact on ride comfort of heavy-duty automobile and it cannot be ignored in ride comfort dosign of heavy-duty automobile.