摘要高频响液压激振台一直是人们重点研究的领域，作为液压激振台的两项重要技术参数，频率和振幅，可以用来表征振动台的振动性能等级。在伺服阀选定后，液压激振台的上限振动频率就可以确定。现用液压激振台系统运用的是定量泵供油形式，输入的波形为正弦波型，振动过程中所需要的流量不是定值，是实时变化的。确定伺服阀后，系统流量便成为实际上限振动频率和振幅的因素，由于定量泵供油存在峰值瞬时流量不足的缺点，从而导致振幅和频率响应特性在系统实际工作中上存在局限性的工况。因此，如何利用现有条件技术，来提高液压激振台的响应特性具有很重要的理论与现实意义。 52885

针对振动台瞬时流量不足的问题，基于蓄能器可瞬间供给大流量的特点，采用在液压振动台系统中合理配置蓄能器作为辅助油源，采取对激振台系统优化设计和合理选取蓄能器参数的方法，达到满足峰值大流量的需求的目的，最终提高液压激振台的振动性能等级。 

最后，通过 AMESim 仿真模拟与实验分析，进行对液压激振台配置蓄能器时和无蓄能器时系统的频响特性比较，结果表明，在系统配置蓄能器下，系统的响频特性得到了极大地改善，表明蓄能器对于提高液压激振台的响应特性具有明显的作用。

毕业论文关键词：液压激振台；蓄能器；响应特性；AMESim

Abstract

High Frequency Hydraulic has been one of the key research areas, as the two sets of hydraulic excitation important technical parameters, frequency and amplitude of the vibration table can be used to indicate the vibration performance level. After selecting the servo valve, Hydraulic vibration test can determine the upper limit of the vibration frequency. Active hydraulic system uses as a  vibrated platform pump oil in the form of quantitative input waveform is a sine wave pattern, vibration process flow is not needed given value, changes in real time. Determine servo valve, the system will become a practical upper limit flow vibration frequency and amplitude factor, because there is quantitative peak instantaneous flow pump oil shortcoming, resulting in amplitude and frequency response characteristics of the actual work in the system condition limitations. Therefore, how to use existing condition technique to improve the response characteristics of the Hydraulic vibration test has a very important theoretical and practical significance. 

By designing and selecting the reasonable parameters of the accumulator and using accumulators as auxiliary oil resource, we can make up the problem of inadequate instantaneous flow. Large flow oil can be make sure in the hydraulic vibration tested .accumulators can be used to release the oil to meet the peak flow, thus this can improve the performance levels of the vibration tested. 

Finally, by AMESim simulation and experimental analysis, carried out on the hydraulic accumulator exciting stage configuration with and without the accumulator when the system frequency response characteristics, the results show that the accumulator in the system configuration, the system frequency characteristics of sound has been greatly improved, indicating that the hydraulic accumulator excitation units for improving the response characteristic has a significant role.

Keywords: Hydraulic vibration test; Accumulator; response characteristics; AMESim

 目  录

第一章 绪论-1

1.1 研究背景-1

1.2 液压激振台的发展-1

1.2.1 液压激振台的类型- -1

1.2.2 液压激振台的发展情况- -3

1.3 主要设计内容-4

  1.3.1 课题设计目标 4

  1.3.2 课题研究的主要任务- -5

  1.3.3 课题研究的主要意义-5