升降舞台人行荷载激励动力学研究及液压系统优化OA

Given the complexity of stage play plots and the constraints of limited architectural space,a high-folding lifting stage was designed.Through load condition analysis and probabilistic methods,the mechanical-hydraulic system was modeled and subjected to dynamic co-simulation using AMESim and ADAMS software.The analysis revealed that impact vibrations are likely to occur during the switching of the reversing valve and during sudden starts and stops.These vibrations can severely disrupt the actors'movements.To address this issue,the hydraulic power system was optimized by incorporating an accumulator and refining the control signals for the reversing valve.Dynamic simulations were then conducted to explore the operational stability of the high-folding lifting stage,considering the coupling effects of pressure,volume,control signals,speed,and load.The results indicate that increasing the reversing time can effectively reduce speed fluctuations.However,once the reversing time reaches 0.5 seconds,further increases do not significantly decrease the acceleration amplitude and may even lead to more noise and vibration.After incorporating an accumulator,the convergence speed of the fluctuations is significantly accelerated.However,this effect is less pronounced when the accumulator volume is 10 liters and the pre-charging pressure is 10 MPa.When the accumulator is used in conjunction with optimized control signals,the overall system performance is further enhanced by 25%.