Experimental Study Of Wind Turbine Tower By Force Performance

Under the energy crisis promoting, wind power is developing rapidly with its uniqueadvantage. With the wind turbine increasingly large, the requirements for its supportingdevice-the wind turbine tower is higher and higher. The cone-type towers as the leadingwind turbine tower, its design has been based on the introduction of foreign technology, hashardly rules and standards of our own. Depth analyzing the mechanical performance of thetower tube, determining its control indicators and parameters, providing a theoretical basisand experimental basis for designing the tower and developing related procedures andstandards has become an important issue for the current researchers.In this paper, a1.5MW wind turbine cone-shaped tower of Baiyun Obo is the studyobject. We made pseudo static test for its scale model, studying its failure mechanism andcharacteristics, stress changes and distribution law, hysteresis performance, bearing anddeformation capacity, energy dissipation capacity. The results were compared with the samemodels of steel tubular concrete lattice three (four) limb columns wind turbine towerstructure.Test results show that the wind turbine cone-shaped tower was the extreme pointinstability and failure, which is sudden, the maximum stress is mainly distributed in thecompression-side wall thickness and the tower bottom，should be carefully considered atthe designing.. The ultimate bearing capacity of the tower is3.61times which sufferedmaximum wind load, larger carrying capacity wealthy. The P-Δ hysteretic curve of tower isnot full anti-"S", overall strength and stiffness degenerated rapidly, indicating that the plasticdeformation capacity and energy dissipation capacity is poor. The results are consistent withthe theoretical values, could reflect the prototype force status, and so re-design the prototypetower. The tower is re-designed by the new method at the basis of the requirements, whichcould save steel of9.18%, improve the material utilization. This method can provide areference for the engineering practice.By comparison with the three (four) limb column wind power tower known: Thestructure symmetry of the cone tower is very favorable to resist the larger variability of thewind load, which force performance is not as good as three (four) limb column tower ingeneral. To comprehensively compare the pros and cons of the types tower, but alsocomprehensive evaluation their economic and construction technology.