疲劳试验中高频正弦运动作动筒所需流量的分析与计算

Analysis and Calculation of Flow Rate of High Frequency Sine Motion Actuator Cylinder in Fatigue Test

在强度试验领域,疲劳试验的需求越来越多,由于高频正弦运动所需流量不只是维持正弦运动的普通流量,还有压力变化造成液体压缩而需要的压缩流量。故运用液体可压缩性理论推导出正弦运动作动筒所需要总流量的计算公式。并通过在AMESim中建立相应仿真模型,通过对比理论计算和仿真结果,说明该理论计算公式具有工程应用性。并且得到影响压缩流量占总流量比例的因素以及最大流量的简化计算公式,对液压系统设计提供了有效的理论依据。

The requirement of fatigue test is increasing in strength test field, the flow rate of high frequency sine motion contains not only the norm flow rate but also the compressible flow rate which generated by pressure varia- tion. So by using liquid compressible theory, the flow rate formula of sine motion actuator cylinder is derived. In order to compare the theoretical calculation and simulation, the simulation model is established in AMESim, the re- sult shows the formula is feasible in engineering application. What＇ s more, the influence factor of the compressible flow rate proportion in total flow rate is concluded and the formula of maximum flow rate is simplified, it provides theoretical foundation for hydraulic system design.