刘明星,王家庆,刘俊建,等.风力发电机塔筒服役过程中应力状态数值模拟[J].精密成形工程,2025,17(5):229-236.
LIU Mingxing,WANG Jiaqing,LIU Junjian,et al.Numerical Simulation of Stress State during Service Process of Wind Turbine Tower[J].Journal of Netshape Forming Engineering,2025,17(5):229-236. |
| 风力发电机塔筒服役过程中应力状态数值模拟 |
| Numerical Simulation of Stress State during Service Process of Wind Turbine Tower |
| 投稿时间：2024-10-14 |
| DOI：10.3969/j.issn.1674-6457.2025.05.025 |
| 中文关键词: 风机塔筒 数值模拟 残余应力 应力状态 疲劳分析 |
| 英文关键词: wind turbine tower numerical simulation residual stress stress state fatigue analysis |
| 基金项目:山东省自然科学基金(ZR2019MEM032) |
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| 摘要点击次数: 53 |
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| 中文摘要: |
| 目的 针对风力发电机塔筒在服役期间疲劳受损的问题，结合塔筒的受力特征和结构特点进行应力状态数值模拟，分析塔筒服役应力与疲劳分布。方法 以装机2 MW的风力发电机塔筒为研究对象，采用ANSYS有限元分析软件进行仿真，分析服役条件下风力发电机各段塔筒结构的受力情况，并设置S-N曲线计算疲劳损伤。结果 在服役条件下，各段风机塔筒的应力分布不同，但应力都主要集中在塔筒法兰焊缝附近位置，迎风侧受轴向拉应力，背风侧受轴向压应力，迎风侧法兰位置是发生疲劳断裂的风险点位置，风机塔筒最大变形发生在塔筒顶端连接机舱位置。在交变载荷的作用下，塔筒迎风面和背风面的疲劳分布一致，最低安全系数均在塔筒下法兰焊缝位置。结论 在服役条件下，考虑到塔筒环焊缝本身就存在焊接应力，在各段塔筒迎风侧和背风侧最大拉、压应力影响的叠加下，会造成塔筒局部的应力集中。因此，在塔筒安装使用时，应避免以塔筒迎、背风侧为焊接起点。 |
| 英文摘要: |
| In response to the problem of fatigue damage to wind turbine towers during service, the work aims to conduct numerical simulations of stress states based on the stress characteristics and structural features of the tower, and analyze the distribution of stress and fatigue during tower service. With a 2 MW wind turbine tower as the research object, ANSYS finite element analysis software was used for simulation to analyze the stress situation of each section of the tower structure of the wind turbine under service conditions, and an S-N curve was set to calculate fatigue damage. Under service conditions, the stress distribution of each section of the wind turbine tower was different, but the stress was mainly concentrated near the flange weld of the tower. The windward side was subject to axial tensile stress, and the leeward side was subject to axial compressive stress. The flange position on the windward side was the risk point for fatigue fracture, and the maximum deformation of the wind turbine tower occurred at the top of the tower connected to the engine room. Under the action of alternating loads, the fatigue distribution of the windward and leeward sides of the tower was consistent, and the minimum safety factor was located at the flange weld position under the tower. In conclusion, under service conditions, each section of the tower is subject to the maximum tensile and compressive stresses on the windward and leeward sides. Considering that the welding stress of the tower's circumferential welds can cause stress concentration, it is necessary to avoid using the windward and leeward sides of the tower as the starting point for welding during installation and use. |
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