A mode test of 1.5MW horizontal-axis wind turbine blade was carried out, using environment prompting method, the structure damping of the blade was determined. And the frequency of a new blade was calculated by using the damping test result. Complex eigenvalue FEM method was adopted in the numerical calculation. The result of the calculation was analyzed. The method of test and calculation in this article can be used in the research, design and blade test of new blade.
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