Fatigue Life Prediction of Rotor Slot-Dovetails in Pumped Storage Generator/Motor Considering Transient Loading

Huang, Xiongfeng; Fan, Hong-Xing; Liu, Dongyuan; Zhang, Yujiao; Jiang, Lan

doi:10.1080/15325008.2019.1602798

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…Relying solely on stress criteria based on the yield strength may not ensure the rotor's longterm longevity. A fatigue life calculation method has been proposed for a pump storage motor/generation under transient load considering repetitive time-varying and asymmetrical stresses as a stress spectrum [13]. Drive cycle based finite element stress analysis and fatigue analysis have been used to improve the rotor geometry and meet the durability requirements of an electric motor [14].…”

Section: Introductionmentioning

confidence: 99%

Rotor Fatigue Life Calculation Using Constant-Amplitude Load Cycles for an Interior Permanent Magnet Synchronous Motor

Kumar Sahu,

Haddad,

Al-Ani

et al. 2024

IEEE Access

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Interior Permanent Magnet Synchronous Motors (IPMSM) are widely used as traction motors today because they can deliver high torque at low speeds, and high efficiency at low-and medium-speed ranges. Air flux barriers and bridges of an IPMSM have contradictory electromagnetic and structural requirements. The rotor undergoes a fluctuating load due to varying speeds in a drive cycle. Designing the rotor with the yield strength as a design criterion might not be sufficient. Fatigue life should be evaluated considering the mean value and amplitude of the fluctuating load profile, and the acceptance criteria should be derived based on field operations. This paper proposes a constant amplitude load cycle as an accelerated fatigue analysis approach for an IPMSM rotor and presents a fatigue analysis workflow considering the thermal and mechanical loads. It also presents the loads and boundary conditions for rotor stress analysis and the effect of elastic and elastic-plastic material properties on stress calculation.

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Section: Introductionmentioning

confidence: 99%

Rotor Fatigue Life Calculation Using Constant-Amplitude Load Cycles for an Interior Permanent Magnet Synchronous Motor

Kumar Sahu,

Haddad,

Al-Ani

et al. 2024

IEEE Access

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“…They used MSC Fatigue software to calculate the runner's life, providing valuable data for the subsequent operation and maintenance of the power station. To ensure the safe operation of the Zhang pumped storage power station, Huang et al [17] conducted unsteady numerical analysis of the full flow field and predicted the fatigue life of the runner under various operating conditions based on the dynamic stress characteristics of the runner. Zhao et al [18] used fluid-structure coupling calculations to analyze the characteristics of the internal flow field in a specific type of hydraulic turbine, studied the causes of the runner's vibration, and predicted the fatigue life of the runner under fluctuating water pressure.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Damage Assessment of Turbine Runner Blades Considering Sediment Wear

Chen,

Pan,

Wang

et al. 2024

Applied Sciences

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The wear phenomenon that occurs on the blades during operation has a significant impact on the fatigue life of the blades. To address the issue of fatigue life assessment for turbine runner blades subjected to increased dynamic stress due to sediment wear, taking a specific high-head hydropower unit’s mixed-flow turbine as the research subject, a hydraulic model of the turbine was established. The wear zones of the runner blades are determined based on the distribution of the flow field’s velocity and the sediment volume fraction. According to the wear rate formula for runner blade material, the amount of wear on the blades is determined, and the dynamic stress data for the dangerous areas of the blades under different degrees of wear are calculated using a unidirectional fluid–structure coupling method. The load spectrum of the time–stress history data for the dangerous area at different levels of wear was compiled using the rain-flow counting statistical method. The operating time ratios for the flood season and the non-flood season are combined. Based on the fatigue cumulative damage theory, the total fatigue damage at the maximum stress part of the runner blade was calculated for different stages of wear, providing a reference for the life calculation of mixed-flow hydraulic turbines.

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