冲击载荷下的磁流变减振器结构设计与动态特性

Structural Design and Dynamic Characteristics Analysis for a Magneto-rheological Gun Recoil Shock Absorber under Impact Load

设计了一个多阶、带槽且经过光滑处理的磁流变后坐减振器。考虑冲击载荷激励下惯性力的影响,建立了冲击载荷激励下的磁流变减振器Herschel-Bulkley-Inertia模型与Bingham-Inertia模型。研制了一套基于冲击载荷激励作用的磁流变减振器动态响应实验平台,利用实验数据对Herschel-Bulkley-Inertia模型与Bingham-Inertia模型参数进行了辨识。实验结果表明所设计的火炮用长行程磁流变减振器可有效抑制冲击载荷,并证实了冲击载荷激励下的磁流变减振器动态响应模型的正确性。

A full--scale mock--up for MR shock absorber characterized with multistage slotted and smoothness disposal under impact load was firstly established. Considering the dynamic of MR shock absorber under impact load, an inertia factor was introduced to Herschel--Bulkley model, which led to two revised models, named as Herschel--Bulkley--Inertia model. And a suit of real--time measuring and controlling simulation experimental platform including hardware and software for dynamic response of MR gun recoil shock absorber under impact load was developed. The parameters in Bingham--Inertia model and Herschel--Bulkley--Inertia model were identificated by using the testing da- ta. Further, the testing results prove that the designed MR gun recoil long--stroke shock absorber＇s dynamic performance under impact load can be well controlled by changing the applied current, and the dynamic response models for MR gun recoil shock absorber under impact load are proved.