摘要
以我国全新研发的某型电动机场消防车作为研究对象,采用动力学仿真的方法分析了其动力耦合传动装置在重载高速工况下的动力学响应。构建的动力学模型考虑了齿轮传动的时变刚度、齿侧间隙等非线性特性,齿轮轴基于Timoshenko梁理论考虑为柔性轴,轴承力则根据轴承的几何特性采用Lamina模型进行计算。研究结果表明:齿轮啮合导致的44阶次对于动力耦合传动箱的振动总量贡献最为突出,且反转工况在2568r/min附近存在明显的共振峰值;通过工作变形分析可知,该共振峰值的出现与输出轴的柔性振动模态相关;适当增大截面尺寸可以有效提高输出轴的弯曲刚度,并改变其振动频率,避免在工作转速范围内可能出现的共振,提升系统阶次的线性度。
A new type of electric ARFF vehicle developed in China is taken as the research object.The dynamic response of the power coupling transmission device under heavy load and high speed condition is analyzed by dynamic simulation.The dynamic model is established by considering the nonlinear char-acteristics of the gear transmission in detail,such as time-vary-ing stiffness and backlash.The gear shaft is considered as a flex-ible shaft based on Timoshenko beam theory.The bearing force is calculated by Lamina model according to the geometric char-acteristics of the bearing type.The results show that the 44th or-der caused by gear meshing contributes most to the overall level vibration of the power coupling device,and there is an obvious resonance peak near 2568 r/min in reverse condition.Through the analysis of operational deflection shape,it can be seen that the resonance is related to the flexible vibration mode of the out-put shaft.Increasing the section size of the output shaft can ef-fectively improve its bending stiffness and change the vibration frequency,so as to avoid possible resonance in the range of working speed and improve the linearity of the system order.
作者
邹瑞明
熊升华
Zou Ruiming;Xiong Shenghua(School of Civil Aviation Safety Engineering,Civil Aviation Flight University of China,Sichuan Guanghan 618307,China;Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province,Civil Aviation Flight Universi-ty of China,Sichuan Guanghan 618307,China)
出处
《消防科学与技术》
CAS
北大核心
2022年第12期1705-1708,共4页
Fire Science and Technology
基金
国家重点研发计划(2018YFC0809500)
中国民用航空飞行学院科研基金(J2021-106)
