中文摘要：

提出了一种带油针的磁流变减震器的结构与工作原理,并进行了结构设计和磁路优化设计,最后通过阻尼特性试验和落震试验研究了该减震器的阻尼特性和减震效果。结果表明：该减震器的阻尼特性良好,阻尼力调节范围大,耗能性能好。通过改变电流,可以改变不同落震高度时的减震器最大垂直载荷和活塞位移,改善了传统起落架减震器的减震效果,对起落架磁流变减震器的研究和应用具有指导意义。

英文摘要：

In order to improve the performance of the shock absorber of aircraft landing gear and study the application of magnetorheological damping technology in the shock absorption structure of aircraft landing gear,the structure and the working principle of a kind of magnetorheological damper with oil needle is proposed and the structure is designed. The optimization of the magnetic circuit is conducted and finally the damping force characteristic and damping effect have been studied through the vibration test and drop test. The results show that the damping characteristic of the shock absorber is good and it has relative large adjustment range for the damping force and good energy dissipation performance. It could change the maximum vertical shock load and the piston displacement of different heights by changing the current.