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首頁> 外文期刊>Mechanical systems and signal processing >Analytical modelling and numerical experiment for simultaneous identification of unbalance and rolling-bearing coefficients of the continuous single-disc and single-span rotor-bearing system with Rayleigh beam model
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Analytical modelling and numerical experiment for simultaneous identification of unbalance and rolling-bearing coefficients of the continuous single-disc and single-span rotor-bearing system with Rayleigh beam model

機譯：用瑞利梁模型同時識別連續(xù)單盤單跨轉(zhuǎn)子軸承系統(tǒng)的不平衡系數(shù)和滾動軸承系數(shù)的分析模型和數(shù)值實驗

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This study proposes an algorithm for the simultaneous identification of residual unbalance and bearing dynamic coefficients of a single-disc and single-span rotor based on the unbalance response. The rotor is modelled as a homogeneous and continuous Rayleigh beam. A fourth-order non-homogeneous partial differential equation set with a homogeneous boundary condition is solved to obtain the analytical solution, which expresses the unbalance response as a function of position, rotor unbalance, and bearing stiffness and damping coefficients. Accordingly, the inverse problem is studied. A novel algorithm that can be applied to both a rolling-bearing rotor and an oil journal bearing rotor is proposed to identify the rotor unbalance during operation. Another novel algorithm is developed to identify the bearing stiffness and damping coefficients for a rolling-bearing rotor. Only four measured unbalance responses are required in the two above-mentioned algorithms. Thus, a simultaneous identification of the rotor unbalance and the roll-bearing dynamic coefficients can be achieved. Furthermore, only a measured response registered for the disc, the two bearings and any other selected cross-section of the rotor shaft under steady-state operating conditions is required. Numerical simulation shows that the proposed identification algorithms have excellent detection capabilities. In summary, the proposed algorithms provide an efficient means for rotor parameter identification without test runs or external excitations. (C) 2018 Elsevier Ltd. All rights reserved.
機譯：該研究提出了一種基于不平衡響應(yīng)同時識別單盤單跨轉(zhuǎn)子剩余不平衡和軸承動態(tài)系數(shù)的算法。轉(zhuǎn)子建模為均勻連續(xù)的瑞利光束。求解具有齊次邊界條件的四階非齊次偏微分方程組以獲得解析解，該解析解表示不平衡響應(yīng)與位置，轉(zhuǎn)子不平衡以及軸承剛度和阻尼系數(shù)的關(guān)系。因此，研究了反問題。提出了一種既可應(yīng)用于滾動軸承轉(zhuǎn)子又可用于油軸承軸承轉(zhuǎn)子的新穎算法，以識別運行過程中的轉(zhuǎn)子不平衡。開發(fā)了另一種新穎的算法來識別滾動軸承轉(zhuǎn)子的軸承剛度和阻尼系數(shù)。在上述兩個算法中僅需要四個測量的不平衡響應(yīng)。因此，可以同時識別轉(zhuǎn)子不平衡度和滾動軸承動態(tài)系數(shù)。此外，在穩(wěn)態(tài)運行條件下，只需要為盤，兩個軸承以及轉(zhuǎn)子軸的任何其他選定橫截面記錄的測量響應(yīng)即可。數(shù)值仿真表明，該算法具有良好的檢測能力。總之，所提出的算法為轉(zhuǎn)子參數(shù)識別提供了一種有效的手段，而無需進行測試運行或外部激勵。 （C）2018 Elsevier Ltd.保留所有權(quán)利。

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