风力轮机变速箱系统的可靠性建模,考虑在冲击降解下故障相关性
Xiaojun Liu1, Ziwen Wu1, Yiping Yuan1
1School of Mechanical Engineering, Xinjiang University, Urumqi 830046, China.
Sensors (Basel, Switzerland)
|July 30, 2025
概括
本研究引入了风力轮机变速箱的动态可靠性框架,考虑到冲击负载和降解. 该模型显著加快了预测的故障率,突出了合分析的重要性.
科学领域:
- 工程 工程师 工程师 工程师
- 可靠性工程可靠性工程
- 机械工程 机械工程
背景情况:
- 传统的可靠性模型往往忽略了随机冲击负载和渐进性退化之间的复杂相互作用.
- 不同降解机制之间的故障相关性在现有分析中经常被忽视.
- 精确的风力轮机变速箱可靠性评估对于运营效率和安全至关重要.
研究的目的:
- 开发一个集成冲击负载,渐进性退化和风力轮机变速箱故障相关性的动态可靠性框架.
- 量化冲击降解合器和故障相关性对变速箱可靠性的影响.
- 用现实世界变速箱系统验证拟议的框架.
主要方法:
- 整合用于连续降解的马过程和用于随机冲击的均波桑过程 (HPP).
- 应用Gumbel-Clayton-Frank混合Copula函数和一个多层嵌套算法来建模故障相关性.
- 使用P-S-N曲线,应力强度干扰理论,RSS原理和遗传算法进行参数估计.
- 在各种操作场景下对2MW变速箱的行星变速阶段系统进行验证.
主要成果:
- 与独立故障假设相比,合可靠性模型显示了加速的可靠性下降,故障率增加了超过37%.
- 与仅基于自然降解的模型相比,拟议的框架显示故障率增加超过60%.
- 该研究成功量化了故障相关性,为变速箱可靠性提供了更现实的评估.
结论:
- 动态可靠性框架有效地捕捉了冲击负荷和风力轮机变速箱退化的协同效应.
- 对故障相关性进行会计显著影响可靠性预测,导致更高的估计故障率.
- 该模型的验证证实了其有效性和适用于现实世界的操作条件的适用性,提高了预测准确性.
相关概念视频
Design of Transmission Shafts - Stress Analysis
501
Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
501
Wind Turbine Machine Models
215
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
215
Transmission Shafts: Problem Solving
291
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
291
Design of Transmission Shafts
459
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by...
459
Turbine-Governor Control
391
Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
391
Stresses in a Shaft
510
The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
510


