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运用通用有限元分析软件ANSYS程序,对风力机基础的简化模型试验进行基于面面接触的非线性有限元模拟与分析,并对其内部钢板表面的应变分布以及钢-混凝土的滑移粘结等性能进行研究,建议基础环的锚固长度为700 mm。根据简化试验模型的非线性接触模型参数,建立足尺风力机基础有限元模型,研究风电基础在极端工况下的混凝土、基础钢环及钢筋的应力应变分布。计算结果表明,该实际风力机基础在极端工况下尽管出现了局部混凝土受拉破坏,但由于钢筋的参与抑制了裂缝的开展,整体结构受力良好,完全能保证上部结构的正常运行。
Using the finite element analysis software ANSYS program, the simplified model test of the foundation of the wind turbine is simulated and analyzed by the nonlinear finite element method based on the surface contact. The internal steel plate surface strain distribution and the sliding bond of steel-concrete Performance studies suggest that the anchoring length of the base ring is 700 mm. Based on the simplified model parameters of nonlinear contact model, a full-scale wind turbine foundation finite element model is established to study the stress and strain distribution of the concrete, the foundation steel ring and the steel bar under extreme conditions. The calculation results show that the actual wind turbine foundation under extreme conditions despite the local concrete tensile failure, but due to the participation of steel to inhibit the development of cracks, the overall structure of the force is good, can fully guarantee the normal operation of the superstructure.