大型风机扩展式基础上阶高度敏感性分析

摘要

针对大型风机扩展式基础台阶上阶高度的变化,基于ANSYS平台建立了不同高度的多工况三维有限元数值模型.引入基础钢环与混凝土及地基之间的非线性接触,研究了上阶高度变化对风机塔架基础特殊形式的受力影响,明确了基础结构沉降规律.对台阶变化引起的结构受力特性的改变进行了分析,确定和提出了合理的台阶高度范围.%The ANSYS -based three -dimensional finite element numerical model is established herein to analyze the sensitivity of different step height of spreading foundation for wind turbine. By introducing nonlinear contacts between foundation ring and concrete, as well as between foundation concrete and ground, the effects of different step height on the settlement of structure and the stress status are studied. The mechanisms of stress and displacement of foundation are also researched. A reasonable step height of spreading foundation is proposed.