大型风力机塔架的静动态分析

基于有限元理论进行了600 kW风力机塔架的静动态分析。根据塔架的力学特性,首先讨论了模型的简化、载荷的计算和边界条件等问题。在静态分析中主要讨论了塔架在有无门洞时各种工况下的承载能力。在动态分析中,为了研究地基对结构的影响,假定在硬地基和弹性地基情况下,研究了塔架的前六阶频率和模态以及机舱和叶轮对塔架频率的影响。并对以上结果进行了对比,得出各种模型对分析结果的影响,为进一步研究奠定了基础。

Static and Dynamic Analysis of Large-scale Wind Turbine Tower Structure

This paper presents static and dynamic analysis of tower structure which is supporting a 600KW wind turbine based on the theory of FEM.According to the static and dynamic characteristics of tower structure,the works about simplifying models and confirming loads and boundary condition are discussed.In static analysis,under different work conditions,the load bearing capacity of tower structure is analyzed with door opening in different direction and without door opening.In dynamic analysis,in order to research the impacts of the foundation to structure,the research discusses the natural frequency and eigenmode from the first sixth modes at the assumption of fixed base and the elastic sub-grade.comparative studies have been performed on the results of the above analysis and some useful conclusions are drawn pertaining to the effectiveness and accuracy of the various models used in the work.Our researching work established foundations for the farther static and dynamic analysis.