Effect of Boundary Conditions on Fluid–Structure Coupled Modal Analysis of Runners

Liu, Dianhai; Xia, Xiang; Yang, Jing; Wang, Zhengwei

doi:10.3390/jmse9040434

Cited by 5 publications

(2 citation statements)

References 17 publications

(27 reference statements)

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“…It can be seen that the interaction between the runner and the water improves the vibration energy and makes the runner more prone to vibration when the runner works in the water medium. Reference [35] confirms that several different constraints of the pump turbine shaft system will produce different results for modal analysis. It is proved in this paper that the surface contact condition of the runner and spindle has little effect on the mode of the shaft system.…”

Section: Influence Of Different Contact Modes On Modal Characteristic...mentioning

confidence: 67%

Comparative Study on Numerical Calculation of Modal Characteristics of Pump-Turbine Shaft System

Liu,

Pang,

et al. 2023

JMSE

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Because a pump-turbine mainly undertakes the role of energy conversion and pumped storage in the field of hydropower engineering, the complex transition process and frequent conversion between different working conditions lead to the increase in the stress and strain of core components such as the unit shaft system, and even cause resonance phenomena. Based on ANSYS finite element numerical calculation software, this paper adopts the acoustic fluid–structure coupling method to study the influence of the shaft of the pump-turbine on the dynamic characteristics of the runner. At the same time, the paper analyses the influence of different contact modes between the runner and the shaft on the modal characteristics of the shaft system. The numerical simulation results have shown that the runner is affected by the added mass of the water. The natural frequency reduction rate of each order of wet modal is ranged from 19% to 64%. The main shaft has a greater influence on the simplification of the shaft system calculation method. The type of contact surface between the main shaft and the runner has a smaller influence on the modal characteristics and the natural frequency of the shaft system. The research in this paper contributes an evaluation of the dynamic characteristics of the runner of a hydraulic turbine unit, which is of great significance for the optimization of the analysis algorithm of the runner structure for large pumped storage units.

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Section: Influence Of Different Contact Modes On Modal Characteristic...mentioning

confidence: 67%

Comparative Study on Numerical Calculation of Modal Characteristics of Pump-Turbine Shaft System

Liu,

Pang,

et al. 2023

JMSE

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“…Resonance mainly occurred in mode 1. (11) The analysis of the vibration of the empty hose and the fluid and hose in each frequency mode was carried out in ANSYS Workbench. The result is shown in Fig.…”

Section: Vibration Characteristics Of Hydraulic Hosementioning

confidence: 99%

Optimization of Displacement by Fluid–Solid Coupled Vibration of Hydraulic Hoses

Lan¹,

Zhang²,

Zhang³

et al. 2023

Sensors and Materials

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Under the excitation of hydraulic oil, fluid-structure coupling affects a hydraulic hose. We analyzed the vibration characteristics and optimized the parameters of the vibration of a hydraulic hose. SolidWorks was used to model a three-layer steel wire wound around a polytetrafluoroethylene (PTFE) hose. A two-way fluid-structure coupling model was built to analyze the influence of different parameters on the displacement by vibration and the fluid vibration speed. A three-factor and three-level Taguchi experiment with displacement was carried out to verify the influence of the parameters. In the analysis of the response surface, fitting regression was conducted using the Box-Behnken method to analyze the vibration displacement. The optimal predicted parameters were a winding angle of 53.8384°, a wall thickness of 7.31313 mm, and a bending radius of 164.343 mm. The error between the predicted and simulated values was ±3.5% for the optimized parameters and the displacement was reduced by 47% for the optimal parameters. The optimal parameters can be used as reference values to improve the working life of vibrating hydraulic hoses in future studies on the vibration characteristics of hydraulic hose systems.

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Characteristics and factors of mode families of axial turbine runner

Xia

Luo

et al. 2023

International Journal of Mechanical Sciences

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Effect of Boundary Conditions on Fluid–Structure Coupled Modal Analysis of Runners

Cited by 5 publications

References 17 publications

Comparative Study on Numerical Calculation of Modal Characteristics of Pump-Turbine Shaft System

Comparative Study on Numerical Calculation of Modal Characteristics of Pump-Turbine Shaft System

Optimization of Displacement by Fluid–Solid Coupled Vibration of Hydraulic Hoses

Characteristics and factors of mode families of axial turbine runner

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