A Design Method of Partial Weight Control for Wind Power Structural System Operational Vibration Reduction

Abstract

The invention discloses a partial weight control design method for shock absorption of a wind power structure system. In consideration of the action effect, caused by different types of harmonic excitations actually stressed on a fan, on the structure, the self frequency characteristic of a designed fan system is far away from the rotating frequency harmonic excitation which greatly affects the structural shock excitation by adjusting a frequency domain weight between the structural modal frequency required for guaranteeing the structural operation safety in the fan design and the excitation frequency and calculating an allowable selection range of a first-order modal frequency of a fan structure to be designed, and the possibility of resonance is reduced. Furthermore, by the fan design flexibility, the fan and foundation structure forms and selectable materials are diversified; by the reasonable design, the engineering manufacturing cost can be reduced, and higher engineering applicability and economical benefit can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of wind power engineering, and relates to a design method of partial weight control for wind power engineering to reduce the vibration of wind turbine structural system operation. idea. Background technique [0002] Faced with many problems such as the continuous shortage of international energy supply and the environmental pollution caused by bio-fossil energy, countries around the world have stepped up efforts to develop clean and renewable energy. Wind energy has become an area with great development potential in new energy due to its large reserves, renewable, clean and pollution-free characteristics, and has received increasing attention from countries all over the world. Whether it is onshore wind power or offshore wind power, the working environment of wind power generators is extremely complex. When operating, they will not only be affected by the combined effects of external environmental loads and indu...

AI Technical Summary

Problems solved by technology

Although the fan designed based on the above safety theory basically does not have structural resonance problems, the first-order natural mode frequency of the structure is usually locked in the narrow frequency range of the rated rotation frequency of the impeller and the minimum multiplier frequency of the actual impeller. The first-order modal frequency and impeller rotation frequency excitation are still relatively close, which is not conducive to avoiding resonance and self-vibration reduction of the fan structure in the running state

At the same time, the traditional wind turbine design concept lacks consideration of the effects of different types and different frequency harmonic excitations on the structure, and the increasingly complex operating environment of wind power systems puts forward higher strength and safety requirements for the design of future wind turbine structures. Requirements, the previous design method with equal weight for operation safety has obvious limitations and blindness in the control and design of wind turbines

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