CAJ | 학술논문

海上风电项目是可再生能源开发和利用的焦点，在开发海上风能的过程中，风机塔筒的自振特性是影响结构安全的重要一环。本文以某一风机塔筒为例，采用ANSYS有限元分析软件进行模态分析，讨论了3种处理质量、刚度非连续变截面塔筒结构的数值模拟简化建模方法，并比较3种方法在自振频率计算方面的准确性。研究表明，采用最大外径进行简化建模可以大大减小前两阶自振频率计算的误差率，所得结论可为类似结构自振频率简化计算提供依据，对于保证海上风电项目的安全性和可靠性有重要意义，具有一定的工程参考价值。
해상풍전항목시가재생능원개발화이용적초점，재개발해상풍능적과정중，풍궤탑통적자진특성시영향결구안전적중요일배。본문이모일풍궤탑통위례，채용ANSYS유한원분석연건진행모태분석，토론료3충처리질량、강도비련속변절면탑통결구적수치모의간화건모방법，병비교3충방법재자진빈솔계산방면적준학성。연구표명，채용최대외경진행간화건모가이대대감소전량계자진빈솔계산적오차솔，소득결론가위유사결구자진빈솔간화계산제공의거，대우보증해상풍전항목적안전성화가고성유중요의의，구유일정적공정삼고개치。
Offshore wind power project is the focus of renewable energy development and utilization .In the process of development of offshore wind energy, wind turbine tower vibration character is an important factor of the safety of structure. This paper sets a wind turbine tower as an example, using the finite element analysis software ANSYS to do modal analysis,discusses 3 kinds of simplified modeling methods to analyze the variable cross-section tower structure which quality and stiffness are not numerically continuous, and compares the accuracy of 3 methods of natural vibration frequency calculation. Results show that building modeling simply by using the maximum outer di-ameter can greatly reduce the modal calculation error rate of the first two orders of the natural vibration frequency. The conclusion can provide reference for the natural vibration frequency calculation of this kind of structure. It is of great significance to ensure the safety and reliability of offshore wind power project, and has reference value to cer-tain extent.