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中文摘要：
基于流固耦合理论和动网格技术，运用CFD-ACE＋软件建立了计算流体力学三维模型。对在弹簧力、驱动力及流体力的作用下液控换向阀的开启过程进行了仿真，仿真结果与理论值、AMESim数值计算基本一致。对3种节流结构的液控换向阀开启过程瞬时的流场、阀芯位移、液动力、von Mises应力分布和形变进行了对比。
英文摘要：
Three-dimensional CFD modals were established via CFD-ACE ＋ software based on fluid- structure interaction and dynamic mesh. The opening process of hydraulic operated directional valves under the spring force, driving force and flow force process were simulated and the results are consistent with the theoretical values and values calculated by AMESim. The transient flow fields, spool displacement, flow force, distribution of von Mises stress, deformation of three different throttle structure of hydraulic directional valves in the opening process were compared and analyzed. operated
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Intelligent Diagnosisof Short Hydraulic Signal Based on Improved EEMD and SVM with Few Low-dimension
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