基于离心泵离散数学模型的临界频率计算

4. J. «VNIIAEN», Ukraine Sumy, Sumy State, S. Ukraine
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引用次数: 0

摘要

离心机转子临界频率的计算目前主要是基于有限元法,采用与ANSYS等类似的三维有限元的多功能软件,以及一些处理梁式有限元的专用计算机程序。不管怎样,我们采用了有限元法。但是在这种情况下,用户需要大量的时间来准备初始数据。因此,本文提出了一种基于离心燃油泵转子离散模型的转子临界频率计算方法。该计算还包括结果澄清算法。通过将基于有限元梁模型和离散模型计算得到的临界频率与使用结果澄清算法和不使用结果澄清算法进行比较,验证了该模型的正确性。
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CALCULATION OF THE CENTRIFULAL PUMP CRITICAL FREQUENCIES BASED ON ITS DISCRETE MATHEMATICAL MODEL
Calculations of the centrifugal machines critical frequencies of the rotors are currently carried out on the basis of the finite element method using multi-functional software as same as ANSYS and other similar, that work with finite elements of the three-dimensional type, as well as some specialized computer programs working with the beam-type finite elements. Anyway, the finite element method is used. But in this case an user needs a lot of time for prepation of the initial data. Therefore, this article presents a calculation of the critical frequencies of the rotor of a centrifugal fuel pump of a liquid-propellant engine based on its discrete model. This calculation also includes an algorithm of results clarification. This model has been verificated by comparing the critical frequencies obtained in calculations based on the finite element beam model and discrete model with using the algorithm of results clarification and without it.
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