连接管路对附加气室空气弹簧刚度特性影响的试验研究

Test Study of the Effect of Connecting Pipe on Dynamic Characteristics of Air Spring with Auxiliary Chamber

带附加气室的空气弹簧系统中连接管路对系统特性有重要影响，搭建使用管路连接附加气室的空气弹簧刚度特性试验系统，在（0．5—10）Hz的激振频率激励下，采用四种不同管路内径、三种不同管路长度的连接管路，对空气弹簧特性台架进行试验，分析管路因素对弹簧特性的影响规律并探讨影响机理。试验结果表明：随着管路内径增大，系统刚度逐渐降低，当管路内径增大到一定值时，管路对空气弹簧刚度的影响比重变小；不同管路长度对系统动刚度的影响主要集中在低频阶段，在同一频率下，系统动刚度随管路长度增加而增大；最后，通过试验对连接管路两端主、附气室气压的幅值差和相位差进行分析，验证了不同管路内径及长度对空气弹簧系统动刚度影响的正确性。

In view of important influence of air spring with auxiliary chamber connected with pipe, the test-platform for the system is built. The stiffness characteristics of air spring with 4 different pipe diameter,4 different pipe length in excitation frequency range of （0.5-10）Hz are tested, and influence principle of pipe parameters on the characteristics of spring and working mechanism are analyzed. The experimental results show that： as the connecting pipe diameter increases, the spring dynamic stiffness will decrease correspondingly; however, when pipe diameter increases to a certain value, influence proportion of the pipe for stiffness will become smaller; influence of dynamic stiffness with different pipe length is mainly concentrated in the low-frequeney stage, and the dynamic stiffness increases as pipe length become larger in same excitation frequency. Data of amplitude difference and the phase difference between the main chamber and auxiliary chamber are analyzed by test, and validity of influence of the spring dynamic stiffness for different pipe is verified.