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为探究空气弹簧动刚度特性,基于计算流体力学并采用流固耦合方式分析计算,即在ABAQUS有限元软件中建立带附加气室空气弹簧固体部分的有限元模型,并在STAR-CCM+流体分析软件中建立空气弹簧内部气体部分模型,通过SIMULIA耦合引擎使得ABAQUS和STAR-CCM+之间进行数据即时交换,最后仿真计算得到空气弹簧动刚度。结果表明:激振频率从1~10 Hz变化,空气弹簧动刚度变化很大;相同频率下,载荷内压越大,空气弹簧动刚度越大;激振振幅越大,空气弹簧动刚度越大;无论频率高低,激振振幅对空气弹簧的动刚度的影响均较大。
In order to explore the dynamic stiffness characteristics of air springs, a finite element model of the solid part of the air spring with an additional air chamber was established in the ABAQUS finite element software based on computational fluid dynamics (CFD) and fluid-structure interaction analysis. In the STAR-CCM + fluid analysis software The internal gas model of the air spring is established. The SIMULIA coupling engine enables instant exchange of data between ABAQUS and STAR-CCM +. Finally, the dynamic stiffness of the air spring is calculated by simulation. The results show that the excitation frequency varies from 1 to 10 Hz and the dynamic stiffness of the air spring varies greatly. The greater the internal pressure is, the greater the dynamic stiffness of the air spring is at the same frequency. The greater the vibration amplitude is, the larger the dynamic stiffness of the air spring is ; Regardless of the frequency of the vibration amplitude of the dynamic stiffness of the air spring greater impact.