+高级检索
基于概率密度演化的风机基础疲劳可靠度计算
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Fatigue Reliability Calculation of Wind Turbine Foundation Based on Probability Density Evolution
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    风机底部基础在风荷载作用下会产生疲劳破坏.为了研究风荷载作用下风机的疲劳可靠性,将随机脉动风荷载进行正交展开,用数论选点法和概率密度演化方法将展开的风荷载模型用于风机塔身的疲劳可靠度计算.采用推力系数法计算风荷载作用下风机基础较危险部位的应力时程,然后用雨流计数法统计该点的疲劳损伤,将其代入概率密度演化方程并通过差分计算可求得疲劳损伤的概率密度函数.通过累计疲劳损伤小于1的概率可求得危险部位的疲劳可靠度,也就是整个基础的疲劳可靠度.以一3 MW风机作为算例验证了本文方法的有效性,应用概率密度演化方法,可以精确地给出基础在风荷载作用下的疲劳可靠度,本文成果对于近似工况的风机基础疲劳可靠度的计算具有借鉴意义.

    Abstract:

    The bottom of wind turbine foundation will cause fatigue damage under wind loads. In order to study the fatigue reliability of wind turbines under wind loads, the random fluctuating wind loads were expanded orthogonally, and the expanded wind load model was used to calculate the fatigue reliability of the wind turbine tower using the number theory selection method and the probability density evolution method. The thrust coefficient method was used to calculate the stress time history of the dangerous part of the wind turbine foundation under the wind load, and then the fatigue damage of the point was calculated by the rain flow counting method, which is substituted into the probability density evolution equation. The probability density function of fatigue damage can be obtained by solving differential equation. By accumulating the probability of fatigue damage less than 1, the fatigue reliability of the dangerous parts can be obtained, that is, the fatigue reliability of the entire foundation. The effectiveness of the proposed method is verified by a 3 MW wind turbine. Using the probability density evolution method, the fatigue reliability of the foundation under wind load can be accurately given. The findings of this paper have reference significance for the calculation of fatigue reliability of wind turbine foundation under similar working conditions.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

赵俭斌,王凯威,王一达,付兵.基于概率密度演化的风机基础疲劳可靠度计算[J].湖南大学学报:自然科学版,2020,47(9):120~127

复制
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-10-14
  • 出版日期:
作者稿件一经被我刊录用,如无特别声明,即视作同意授予我刊论文整体的全部复制传播的权利,包括但不限于复制权、发行权、信息网络传播权、广播权、表演权、翻译权、汇编权、改编权等著作使用权转让给我刊,我刊有权根据工作需要,允许合作的数据库、新媒体平台及其他数字平台进行数字传播和国际传播等。特此声明。
关闭