水平轴风力机塔架载荷谱及疲劳寿命仿真分析

摘要

Aiming at 1.5 MW horizontal axis wind turbine,this paper establishes a finite element model of the wind turbine,and makes use of wind vibration coefficient method and Betz momentum theory to calcu-late the wind turbine quasi-static wind load.Then,the article takes the trigonometric series superposition method as the basis to analyze the response of wind turbine tower in the effect of complex alternating load-ing.And it takes Miner linear fatigue accumulation damage theory as the basis to analyze the fatigue life of such wind turbine tower.The results show that it meets the design life of 30 years,providing a reference for wind turbine design.%针对1．5 MW 水平轴风力机，建立风力机的有限元模型.运用风振系数法和 Betz 动量理论计算风力机拟静力风载荷，以三角级数叠加法为基础分析了风力机塔架在复杂交变载荷作用下的响应，基于 Miner 线性疲劳累积损伤理论，分析了该类风力机塔架的疲劳寿命.结果表明，满足设计寿命要求30年，为风力机结构设计提供了参考依据.