6自由度液压振动台流量仿真
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摘要
为解决6自由度液压振动台流量设计问题,建立基于Simulink的6自由度液压振动台流量仿真模型,输入波形是加速度,再通过模型转换得到速度波形,速度波形乘以缸数、缸有效面积得到流量,合成得到3轴向总的流量需求,同时得到蓄能器应提供的补充流量、蓄能器应释放的总油液容积。仿真表明,不论是地震波还是正弦拍波,都能通过仿真快速得到流量波形、油液容积等重要的参数。本方法可以快速准确获得给定缸面积、缸峰值速度、给定运动加速度波形下的总流量需求、蓄能器应提供的流量及蓄能器应提供的油液容积,为3轴6自由度液压振动台的流量设计提供参考。
To get total flow requirement of a tri-axial 6-DOF hydraulic shaker, its Simulink model is established to simulate the flow process of the shaker table. The input wave is the acceleration wave. It is translated into a velocity wave by this model. Then, the velocity is multiplied by the available sectional area of each cylinder and the number of the cylinders to get the flow rate in each axial direction. Finally, the three axial flows are combined to get the total flow requirement.Meanwhile, the complementary flow supplied by the accumulator and the total oil volume released by the accumulator are obtained. The results of simulation show that the flow wave and the oil volume can be obtained quickly through the simulation for either seismic wave or sinusoidal beat wave input. Using this method can quickly and precisely obtain the total flow requirement, the flow and oil volume provided by the accumulator when the area of the cylinder, peak velocity of the cylinder and the acceleration wave are given. The results provide an effective reference for design of the hydraulic system of the tri-axial 6-DOF hydraulic shaker.
To get total flow requirement of a tri-axial 6-DOF hydraulic shaker, its Simulink model is established to simulate the flow process of the shaker table. The input wave is the acceleration wave. It is translated into a velocity wave by this model. Then, the velocity is multiplied by the available sectional area of each cylinder and the number of the cylinders to get the flow rate in each axial direction. Finally, the three axial flows are combined to get the total flow requirement.Meanwhile, the complementary flow supplied by the accumulator and the total oil volume released by the accumulator are obtained. The results of simulation show that the flow wave and the oil volume can be obtained quickly through the simulation for either seismic wave or sinusoidal beat wave input. Using this method can quickly and precisely obtain the total flow requirement, the flow and oil volume provided by the accumulator when the area of the cylinder, peak velocity of the cylinder and the acceleration wave are given. The results provide an effective reference for design of the hydraulic system of the tri-axial 6-DOF hydraulic shaker.
引文
[1]方重.大型模拟地震振动台主要参数的确定及技术经济性分析[J].世界地震工程,2001,17(4):135-138.
[2]方重,曹文清.大型模拟地震振动台液压部件参数的计算[J].世界地震工程,2002,18(3):85-88.
[3]黄浩华.地震模拟振动台的设计与应用技术[M].北京:地震出版社,2008.
[4]国巍,余志武,蒋丽忠.地震模拟振动台台阵性能评估与测试注记[J].科技导报,2013,31(12).
[5]王浩伟.利用蓄能器提高液压振动台响应特性的研究[J].液压与气动,2010,11:65-68.
[6]牛宝良.基于单自由度振动模型的IIR数字滤波器设[J].太赫兹科学与电子信息学报,2014,12(5):702-706.Biography:NIU Bao-liang(1963-),Male,SHAANXI province,Master,Researcher,Research focus:Vibration,acceleration environmental test and equipment development.
[2]方重,曹文清.大型模拟地震振动台液压部件参数的计算[J].世界地震工程,2002,18(3):85-88.
[3]黄浩华.地震模拟振动台的设计与应用技术[M].北京:地震出版社,2008.
[4]国巍,余志武,蒋丽忠.地震模拟振动台台阵性能评估与测试注记[J].科技导报,2013,31(12).
[5]王浩伟.利用蓄能器提高液压振动台响应特性的研究[J].液压与气动,2010,11:65-68.
[6]牛宝良.基于单自由度振动模型的IIR数字滤波器设[J].太赫兹科学与电子信息学报,2014,12(5):702-706.Biography:NIU Bao-liang(1963-),Male,SHAANXI province,Master,Researcher,Research focus:Vibration,acceleration environmental test and equipment development.