冲击载荷下磁流变阻尼器动态特性试验分析

应用于火炮反后坐装置中的磁流变阻尼器工作在高冲击、高速环境下，因此对所设计长行程磁流变阻尼器进行了冲击试验，测试其在冲击载荷下的动态特性及性能指标。通过采用非线性最小二乘法对试验数据拟合，基于Herschel-Burkley磁流变液非线性本构特性的平行平板恒流模型，提出了冲击载荷下磁流变阻尼器的动态特性模型。并利用该数学模型对磁流变阻尼器在反后坐装置应用中的可控性进行了深入讨论。理论分析表明：在火炮反后坐装置应用中，利用磁流变阻尼器阻尼力可调特性，可以实现理想的后坐动态特性。

Experimental Analysis of the Dynamic Performance of Magneto-Rheological Dampers Under Impact Loads

Since magneto-rheological (MR) dampers applied to gun recoil mechanisms experience im?pact loads and high velocities, the impact test for the special designed long-stroke MR damper was done, and the dynamic performance of the MR damper was examined. The dynamic performance mo?del of the MR damper under impact load was proposed by fitting the experimental data with nonlinear least square method and on the basis of the steady flow equations for parallel plates based on nonlinear Herschel-Burkley constitutive performance of the MR fluid. The controllability of the damping force of MR dampers used for recoil mechanisms was further analyzed with the above model. The results indi?cate that it，s feasible that the ideal recoil dynamic performance can be realized by the controllability of the damping force of MR dampers for using MR dampers on recoil mechanisms.