非定常水动力作用下泵壳振动模拟的可行性研究

V. Lomakin, K. Mikheev, A. Veselov, V.D. Fomenko
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引用次数: 0

摘要

提高泵的使用寿命和降低泵的噪声是现代泵工程的一个重要领域。首先尝试引入共轭计算验证数学模型的正确性,然后确定泵壳的主振荡频率。在液体和固体介质边界处,采用FSI界面进行共轭计算。对得到的振荡信号进行傅里叶分析,确定了泵的主要寄生频率。预计主要寄生频率将是叶片频率。计算的结果是,通过将数学模型应用于最简单的玻璃模型来验证数学模型的正确操作成为可能,这种模型的行为很容易解释。该数学模型在悬臂式和多级泵上进行了试验,得到了良好的结果,并证明了叶片频率是主振荡频率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation of the possibility to simulate oscillations of the pump housing exposed to effects of the unsteady hydrodynamic forces
Increase in the service life and noise reduction in pumps is an important area in modern pump engineering. An attempt was made to introduce conjugate calculations in verifying correct operation of the mathematical model as the first step and identifying the main oscillation frequencies of the pump housing subsequently. The FSI interface was used in conjugate calculations at the boundary between liquid and solid media. The obtained oscillation signals were analyzed using the Fourier analysis to identify the main parasitic frequencies in the pump. It was expected that the main parasitic frequency would be the blade frequency. As a result of calculations, it became possible to verify correct operation of the mathematical model by applying it to the simplest model of a glass, which behavior could be easily explained. The mathematical model was tested on cantilever and multistage pumps, demonstrated good results and made it possible to establish that blade frequency was the main oscillation frequency.
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