A. V. Kiryukhin, O. O. Milman, A. V. Ptakhin, V. O. Miloserdov
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引用次数: 0
摘要
研究表明,随着振动频率的增加和不可压缩工作流体的存在,通过各种设备的隔振管道连接处的振动传递和工作介质压力脉动可能会增加两到三个数量级。本文介绍了对决定这一现象的物理模型的研究结果。考虑了空间三分量宽带主动振动保护系统(AVS)的实验结果,该系统用于在液体隔振交界处之外减振。给出了一个实验装置方案,用于研究同时对交界处下游的动力、振动和压力脉动进行空间主动阻尼的情况。计算得出了所考虑的 AVS 最大效率与频率的关系。结果表明,在无反馈的开环中可以实现有效的力主动阻尼。在实验设备上进行开环阻尼时,在 5 至 800 Hz(超过七个八度音阶)的频率范围内,三个方向的动态力主动阻尼效率可达 10 dB 或更高。对科学出版物的分析表明了这一结果的独特性。在这种情况下,在主动阻尼频率范围之外不存在负效率区,而使用其他主动阻尼方法时会出现这种情况。
Peculiarities of reducing the broadband transfer of vibration and working medium pulsation through vibration-isolating junctions of pipelines with liquid by constructive and active methods
It is shown that the vibration transfer and working medium pressure pulsations through vibration-isolating pipeline junctions of various plants may increase by two or three orders of magnitude with an increase in the vibration frequency and in the presence of incompressible working fluid. The results of research of the found physical models that determine this phenomenon are presented. The experimental results for a spatial three-component broadband active vibration-protection system (AVS) for vibration damping beyond the vibration isolation junction with liquid are considered. An experimental plant scheme for studying the simultaneous spatial active damping of dynamic forces, vibrations and pressure pulsations downstream from the junction has been given. Calculated dependences of the maximum efficiency of considered AVS on frequency are obtained. Efficient active damping of forces is shown to be attainable in an open loop without feedback. While damping in an open loop at the experimental plant, the efficiency of active damping of dynamic forces is obtained in three directions up to 10 dB or more in the frequency range from 5 to 800 Hz (more than seven octaves). The analysis of scientific publications reveals the uniqueness of this result. In this case, there are no zones of negative efficiency outside the active damping frequency range, which appear while using other methods of active damping.
期刊介绍:
The journal Thermophysics and Aeromechanics publishes original reports, reviews, and discussions on the following topics: hydrogasdynamics, heat and mass transfer, turbulence, means and methods of aero- and thermophysical experiment, physics of low-temperature plasma, and physical and technical problems of energetics. These topics are the prior fields of investigation at the Institute of Thermophysics and the Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), which are the founders of the journal along with SB RAS. This publication promotes an exchange of information between the researchers of Russia and the international scientific community.