考虑阀片变形的阻尼可调减振器动特性研究

Study on Dynamic Characteristics of Damping Adjustable Dampers Considering Valve Deformation

为预测阻尼可调减振器的性能,需要对阻尼可调减振器动特性进行研究。通过对标某款阻尼可调减振器,以其结构及工作原理为基础,考虑阀片环形节流缝隙对阀片载荷力的影响,构建出节流阀片力学模型,应用变形理论建立阀片曲面微分方程并设定边界条件,得到在载荷力P作用下阀片变形量与半径的关系式,在此基础上建立减振器复原-压缩行程的数学模型,并搭建减振器Simulink模型,仿真得到减振器动特性曲线,对比MTS849减振器实验台的测试结果表明,减振器动特性的试验曲线与仿真曲线大致重合,仿真模型误差在13%以内;可见在载荷力P情况下建立的数学模型精确可靠,同时通过数据对比可以得到减振器动特性的一般规律。

The dynamic characteristics of the damping adjustable damper are studied.Based on the structure and working principle of the damping adjustable damper,the mechanical model of the throttle plate of the valve is constructed.The influence of the annular throttling gap of the valve on the loading force of the valve is considered.The deformation theory is used to establish the surface differential equation of the throttle plate,and the corresponding boundary conditions are given.The relationship between the deformation amount and the radius of the valve plate under the action of the load force P is obtained.On this basis,the mathematical model of the recovery and compression strokes of the damper is established and model of the damper is built in the Simulink.The dynamic characteristics of the damper are obtained by simulation.The simulation results are compared with the test results of the MTS849 damper test bench.It is shown that the test curve of the dynamic characteristics of the damper is essentially coincident with the simulation curve,and the difference between the two curves is within 13%.So,the mathematical model established above is accurate and reliable,and the general rule of the dynamic characteristics of the damper can be obtained through data comparison.