叶片应变随侧风角度变化的特征分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (1) : 114-119.

论文

叶片应变随侧风角度变化的特征分析

马剑龙1,2，李佩林1，吕文春3，白叶飞1,2，张彦奇1，汪建文1,2

作者信息 +

Feature analysis of blade strain variation with crosswind angle

MA Jianlong1,2, LI Peilin1, LU Wenchun1,3, BAI Yefei1,2, ZHANG Yanqi1, WANG Jianwen1,2#br# 

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文章历史 +

摘要

利用TST5925装置和PULSE19装置构建了叶片表面应变与发电机、塔架、基座振动加速度的同步监测系统，针对直径1.4m的小型水平轴风力机侧风工况下叶片气动中心线及叶根附近位置的应变进行测试与分析。证实了最恶劣侧风角的存在，处于该侧风角度时叶片承受的侧风激振力最强，离心力是导致叶片最恶劣侧风角发生迁移的主要诱因。揭示了来流风速及叶片转速一定的情况下，叶片不同位置所对应的最恶劣侧风角不尽相同，低转速时叶根附近所对应的最恶劣侧风角往往小于叶尖和叶中部，但其随离心力变化的响应速度却较其它位置敏感。远离最恶劣侧风角时，应变值随转速的变化近似成线性；逐渐靠近该侧风角时，侧风激振力对叶片应变的影响显著增强，并导致其产生强烈脉动。

Abstract

The simultaneous monitoring system of blade surface strains and vibration accelerations of a generator, its tower and base was constructed by using a TST5925 device and a PULSE19 device. The strain values at the blade root and the pneumatic centerline of a 1.4 m diameter horizontal axis wind turbine were measured and analyzed under crosswind conditions. The results showed that there is the worst crosswind angle, at this angle the blades withstand the strongest crosswind exciting force and the centrifugal force is the primary cause leading to blades shift; the worst crosswind angles corresponding to different blade positions are not the same under fixed wind speed and blade rotating speed; at lower rotating speeds, the worst crosswind angles near the blade root are often smaller than those at the tip and middle of the blade, but their responding speeds variations with the centrifugal force are more sensitive than those at other locations; strain value changings with blade rotating speed are approximately linear while for away from the worst crosswind angles, the impact of the crosswind exciting force on the blade strain significantly increases and causes a strong pulsation of strain values while close to the worst crosswind angles.

导出引用

马剑龙1,2，李佩林1，吕文春3，白叶飞1,2，张彦奇1，汪建文1,2. 叶片应变随侧风角度变化的特征分析[J]. 振动与冲击, 2017, 36(1): 114-119

MA Jianlong1,2, LI Peilin1, LU Wenchun1,3, BAI Yefei1,2, ZHANG Yanqi1, WANG Jianwen1,2. Feature analysis of blade strain variation with crosswind angle[J]. Journal of Vibration and Shock, 2017, 36(1): 114-119

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