摘要
分析流体模型的选取对于管路系统幅频特性的影响,结果表明:选取不同的流体模型,其幅值比相差较大,但是谐振频率相差不大,因此在只需要考虑谐振频率的情况下,可以采取流体模型Ⅰ代替实际流体进行计算。基于流体模型Ⅰ和MATMAB符号函数功能,计算出系统幅频特性曲线,通过分析曲线得出系统固有频率,将计算结果与试验数据进行对比,证明该方法简单可靠、可移植性好。
The, influences of fluid models on amplitude-frequency characteristics of pipeline system were analyzed. The conclusion shows that different fluid model only shows relative large difference in amplitude, and has little effect on difference of resonance frequency. It is appropriate to use the fluid model I replacing practical fluid for calculation when resonance frequency is only taken into consideration. The frequency response characteristic curve was calculated by fluid model I and symbolic function of MATLAB. The in- herent frequency was obtained by analyzing the curve. By comparing calculated results with the experimental data, the method is proved to be simple, reliable and transplantable.
出处
《机床与液压》
北大核心
2011年第3期69-71,74,共4页
Machine Tool & Hydraulics
关键词
管路系统
幅频特性
流体模型
传递矩阵
Pipeline system
Amplitude-frequency characteristic
Fluid model
Transfer matrix
