风机基础地基附加应力计算的统一化数值公式  

Study on Unified Formula for Numerical Calculation of Additional Stress of Wind Turbine Foundation

作　　者：李幸周 陈兴哲 LI Xingzhou;CHEN Xingzhe(Northeast Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Changchun 130021,China)

机构地区：[1]中国电力工程顾问集团东北电力设计院有限公司,吉林长春130021

出　　处：《电力勘测设计》2023年第6期38-45,共8页Electric Power Survey & Design

摘　　要：风机基础在极端荷载工况和多遇地震工况下,基底部分脱开应力重分布,此时,圆形基础地基附加应力系数和平均附加应力系数没有解析解,无法依据建筑地基基础规范的附加应力系数表格查表计算。为计算风电圆形基础、矩形基础基底轴线下任意点各分布荷载下的附加应力系数和平均附加应力系数,首次推导矩形基础和圆形基础线性地基应力分布下统一的附加应力数值积分公式,探讨数值计算的高效方法,采用解析法与数值法结合的手段,通过先沿Y向条带积分得到解析式,将附加应力求解转变为沿X向定积分的数值求解,相对于求解变积分限二重积分而言,计算过程更加便捷、高效。Under extreme load conditions and frequent earthquake conditions,the foundation of the wind turbine undergoes stress redistribution due to the detachment of the base.At this time,there is no analytical solution for the additional stress coefficient and average additional stress coefficient of the circular foundation,and it cannot be calculated based on the additional stress coefficient table in the building foundation code.In order to calculate the additional stress coefficient and average additional stress coefficient under various distributed loads at any point under the axis of wind power circular foundation and rectangular foundation base,the unified numerical integration formula of additional stress under the linear foundation stress distribution of rectangular foundation and circular foundation is derived for the first time,and the efficient method of numerical calculation is explored.Transforming the solution of additional stress into the numerical solution of definite integral along the X direction,the calculation process is more simple,convenient and efficient than solving the variable integral limit double integral.

关 键 词：风机基础 附加应力 附加应力系数 数值计算 

分 类 号：TU443[建筑科学—岩土工程]