Double-inerter parallel type four-order vibration reduction structure

Abstract

The invention discloses a double-inerter parallel type four-order vibration reduction structure. The double-inerter parallel type four-order vibration reduction structure comprises two stages of second-order vibration reduction structures, and the two stages of second-order vibration reduction structures are divided into the first-stage second-order vibration reduction structure and the second-stage second-order vibration reduction structure; each of the first-stage second-order vibration reduction structure and the second-stage second-order vibration reduction structure comprises a spring, aninerter and a damper, and the first-stage second-order vibration reduction structure and the second-stage second-order vibration reduction structure are both in a series connection form of the spring, the damper and the inerter or in a series-parallel connection integrated form; and the upper end point and the lower end point of the first-stage second-order vibration reduction structure are connected with the upper end point and the lower end point of the second-stage second-order vibration reduction structure respectively to form a double-inerter parallel type fourth-order vibration reduction structure. According to the double-inerter parallel type four-order vibration reduction structure, the damping ratio and the vibration reduction effect of a fan system can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction of offshore wind turbines, in particular to a double-inerter parallel fourth-order vibration reduction structure. Background technique [0002] With the gradual increase in the power of a single unit of offshore wind turbines, the quality of the nacelle, impellers, floating platforms, and the height of the tower continue to increase. Because the tower made of flexible materials can greatly reduce the weight of the tower when the height is high, reduce the production cost of the tower, and improve the economic applicability of the wind turbine, so the flexible tower is widely used in large offshore wind turbines. However, the material properties of the flexible tower itself determine that the tower amplitude and platform pitch angle increase under the external wind and wave load conditions of the offshore wind turbine, which affects the reliability of the wind turbine and threatens the ...

AI Technical Summary

Problems solved by technology

[0004] The traditional TMD device is limited to the simple combination of spring, damper and mass block, which has great limitations on the vibration reduction effect of the fan, and its own volume and mass block are too large, thus occupying too much space inside the engine room and affecting the wind turbine. There is a certain burden on the structure

Images