Wind power spindle forging is one of the key components in wind turbine, which is affected by nonlinear vibration and dynamic interaction. Nonlinear vibration refers to the nonlinear relationship between the amplitude and the exciting force in the vibration process of the spindle forging, that is, the change of the amplitude not only depends on the size of the exciting force, but also the doubling of its frequency or the growth of the ladder.
The nonlinear vibration and dynamic interaction of wind power spindle forging is important in the following aspects:
- Nonlinear vibration may cause additional resonance in the vibration process of the wind power spindle forging, which increases the vibration amplitude and may lead to dynamic instability.
- The dynamic interaction will cause the vibration mode of the wind power spindle forging to change, which will affect its working state and even cause serious problems such as flutter.
- The effect of nonlinear vibration and dynamic interaction may lead to fatigue damage and damage of the spindle forging in the long-term working process, and have a negative impact on its life.
The nonlinear vibration and dynamic interaction of wind power spindle forging is affected by many factors:
- The geometry and material properties of the spindle forging: the geometry of the spindle forging has an important impact on its nonlinear vibration characteristics, and different geometric shapes and material properties may lead to different vibration responses.
- The frequency and amplitude of the excitation force: the frequency and amplitude of the external excitation force have a direct impact on the nonlinear vibration of the spindle forging, and the high frequency and large amplitude of the excitation force will increase the nonlinear effect of the vibration.
- Working environment: The working environment of the spindle forging, such as temperature, humidity, air flow and other factors, will have a certain impact on its vibration characteristics.
In order to effectively reduce the adverse effects of nonlinear vibration and dynamic interaction, the following measures can be taken:
- Structural optimization design: reduce the nonlinear response of vibration by optimizing the geometry and material properties of spindle forgings.
- Power system adjustment: By optimizing the power system of the wind turbine, such as improving the control strategy of the generator, reducing the dynamic imbalance of the transmission system, etc., to reduce the impact of the exciting force on the spindle forging.
- Vibration signal monitoring and diagnosis: Establish a sound vibration signal monitoring system to timely monitor the vibration state of the spindle forging, and combine diagnostic technology for fault warning and accurate diagnosis.
All in all, the nonlinear vibration and dynamic interaction of wind power spindle forging is a complex and important problem, which needs to consider a variety of factors and take appropriate measures to reduce its adverse effects to ensure the safe operation and life improvement of wind power generation system.
