An empirical hybrid shock absorber model capable of capturing nonlinear and hysteresis characteristics of shock absorbers is built.The nonlinear characteristics are modeled by algebraic function and the hysteresis effects between shock force and shock velocity are modeled by neural network.To develop the empirical hybrid shock absorber model,a Mazda CX-7 front shock absorber is tested by a displacement-controlled hydraulic shock absorber testing machine.The hybrid shock absorber model is built and validated using the experimental shock absorber data.The RMS value for the hybrid shock absorber model is 60.28N at the velocity range from-1.3m/s to 1.3m/s.

为了预测指尖密封迟滞特性,提出了用能够直观反映指尖密封迟滞特性的最小迟滞量来表征指尖密封的迟滞,建立了指尖密封最小迟滞量计算的数学模型,确定了模型中的修正系数,并进行了试验验证,采用修正后的计算模型研究并获得了结构和工况参数对指尖密封迟滞的影响规律。研究结果表明采用修正后的模型进行考虑迟滞效应的泄漏特性数值计算与试验结果误差最大为7.64%,最小迟滞量的计算模型合理可靠;指尖密封结构参数对其最小迟滞量影响程度从小到大依次为指梁型线圆、指梁间隙、指梁根圆、指梁顶圆、指梁基圆、周向角、指尖片厚度。研究结果为进一步开展迟滞对指尖密封泄漏特性影响和指尖密封结构优化设计的研究提供了依据和理论基础。