Dynamic response analysis of steel-concrete hybrid tower considering P-Δ effect
To improve the efficiency of analyzing the dynamic responses of the wind turbine steel-concrete hy-brid tower,an efficient analysis method is proposed for analyzing the dynamic responses.The wind turbine steel-concrete hybrid tower is regarded as a Euler-Bernoulli cantilever beam with a lumped mass at its free end.The influence of the second-order gravity effect(P-Δ effect)on the overall structural dynamic response is con-sidered,as well as the effect of the steel and concrete on the overall damping ratio of the structure.A compari-son with finite element simulation results based on ABAQUS validates the effectiveness of the proposed meth-od,and the influence of the P-Δ effect on the overall dynamic responses is investigated.The comparison re-sults indicate that compared with the results without considering the P-Δ effect,the theoretical analysis results considering the P-Δ effect are closer to the finite element analysis results.The maximum relative errors be-tween the theoretical and the finite element analysis results for displacement,velocity,and acceleration are 3.09％,3.81％,and 4.63％,respectively.It indicates that the established analysis model for the dynamic re-sponse of the wind turbine steel-concrete hybrid tower has a comparable calculation accuracy to the finite ele-ment analysis.
steel-concrete hybrid towerwind turbinedynamic responsesecond-order gravity effectequivalent damping ratio
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维普
