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为了解决某商用车行驶过程中出现的驾驶室异常抖动现象,对车辆进行了道路振动试验,测得车辆各位置振动信号,通过对信号的分析得出车辆驾驶室悬置系统减振效果较差、车辆平顺性能不理想的结论;再通过建立ADAMS动力学振动仿真模型对驾驶室悬置系统进行了振动仿真及参数优化。优化过程中针对悬置系统阻尼器的非线性阻尼参数,提出了用力模块取代弹簧阻尼器模块,由非线性阻尼力拟合得到数学模型表达式,将对阻尼参数的优化转化为对力模块公式中变量优化的新优化方法。通过优化解决了车辆驾驶室异常抖动的问题,改善了车辆的平顺性。最后通过再次进行道路试验,验证了优化结果的准确性和可行性。
In order to solve the abnormal chattering of the cab during the driving of a commercial vehicle, the vehicle was tested for the road vibration and the vibration signal of each position of the vehicle was measured. The analysis of the signal shows that the suspension system of the vehicle cab has less damping effect , And the vehicle ride comfort is unsatisfactory. Then the vibration simulation and parameter optimization of the cab suspension system are established by establishing the dynamic simulation model of ADAMS. In order to solve the nonlinear damping parameters of the suspension damper in the optimization process, a force module instead of a spring damper module is proposed to obtain the mathematical model expression by nonlinear damping force. The optimization of the damping parameter is transformed into the force module formula New Optimization Method for Medium Variable Optimization. Through the optimization to solve the problem of abnormal vibration of the vehicle cab to improve the ride comfort. Finally, the road test was conducted again to verify the accuracy and feasibility of the optimization results.