皮本谦?李嘉晖?王健?郑潇

摘 要：基础环式风机基础的损伤是基础环式风机发生安全事故的主要原因。针对风机基础的损伤，利用ABAQUS有限元软件建立风机基础的三维有限元模型，计算风机基础环在基础环-混凝土黏结逐渐失效、基础环侧壁混凝土裂缝扩展、基础环下法兰处混凝土空腔扩展这三种情况下的水平度。结果表明：随着基础环-混凝土黏结逐渐失效和基础环侧壁混凝土裂缝的扩展，基础环水平度都有一定程度的增加，但未超过规范规定的数值，此时风机基础虽有损伤，但尚能正常运行;随着基础环下法兰处混凝土空腔的扩展，基础环水平度呈几何式增长，基础环最大水平度远远超过规范所允许的数值，此时风机不能正常运行。

关键词：风机基础;基础环水平度;风机损伤;有限元模拟

中图分类号：TM315文献标识码：A文章编号：1003-5168（2021）05-0033-05

Abstract： The damage of foundation ring fan foundation is the main cause of safety accident of foundation ring fan. Aiming at the damage of fan foundation， a three-dimensional finite element model of fan foundation was established by using ABAQUS finite element software to calculate the damage of fan foundation ring， such as gradual failure of foundation ring concrete bond， expansion of concrete crack on side wall of foundation ring and expansion of concrete cavity at flange under foundation ring levelness under three working conditions. The results show that： with the gradual failure of the foundation ring concrete bond and the expansion of the concrete cracks on the side wall of the foundation ring， the levelness of the foundation ring increases to a certain extent， but it does not exceed the value specified in the specification. At this time， although the fan foundation is damaged， the fan can still operate normally; with the expansion of the concrete cavity at the lower flange of the foundation ring， the levelness of the foundation ring increases geometrically， and the foundation ring is the most stable The large levelness far exceeds the value allowed by the specification， and the fan can not operate normally at this time.

Keywords： fan foundation;foundation ring levelness;fan damage;finite element simulation

我國陆上风机多数采用基础环式风机。基础环式风机基础由钢制基础环和钢筋混凝土组成。基础环作为预埋在基础混凝土内部的钢制部分，是基础和钢塔连接的过渡构件，也是钢塔筒与基础连接的关键构件。基础环设上下法兰，其中上法兰用于连接上部风机钢筒，下法兰用于连接基础。风机基础环的水平度是风机基础施工控制的重要参数，基础环的水平度直接关系到风机的平稳运行。《风力发电机组 装配和安装规范》（GB/T 19568—2017）规定基础环水平度不得超过3 mm[1]。

关于基础环式风机基础，大量研究者集中研究风机基础的损伤机理和基础的疲劳损伤演变过程。……