CAREER: Offshore Wind Turbines Subjected to Hurricanes: Simulation of Wind-Wave-Structure Interaction and Aerodynamic Load Reduction

这个学院早期职业发展（Career）项目的研究目标是调查海上风力涡轮机在飓风载荷下的行为，并开发可以减少损害的新方法。具体的研究活动包括：(1)建立考虑波、风、土和结构相互作用的时域分析程序；(2)利用与飓风现场观测相符的荷载研究风力机的性能；(3)设计压电表面驱动机构，从空气动力上减小风力；(4)探索结构的重构以减小阻力。风力涡轮机塔的新时域公式将与由国家可再生能源实验室开发和维护的涡轮机分析程序FAST集成。将利用最近对飓风特征的实地观测来确定荷载。还将进行比例模型的风洞试验，以获得数值模拟所需的参数，并量化压电表面驱动对减小阻力的影响。海上风力发电场具有巨大的能源潜力，但主要问题之一是风力涡轮机在飓风中的脆弱性。该项目的结果可以降低风力涡轮机结构在飓风中的风险，并有助于更广泛地采用海上风能。首席研究员将与国家可再生能源实验室合作，以便更广泛的受众可以获得研究成果。该研究项目通过本科生和研究生的参与，以及通过学院与少数民族服务机构的合作关系，参与代表性不足的学生的参与，与教育相结合。为了增加能够在可再生能源领域工作的工程师的数量，将利用大学范围内的可再生能源合作和佛罗里达州立大学（FSU）远程学习办公室。该项目将通过FSU青年学者计划让高中生参与研究。在KidWind的帮助下，将为K-12教师提供年度研讨会。通过这些讲习班，教师们将开发有关风能的教学模块，以加强他们的科学课程。

The research objectives of this Faculty Early Career Development (CAREER) project are to investigate the behavior of offshore wind turbines subjected to hurricane loads and to develop novel approaches that can reduce the damage. Specific research activities include: (1) to establish a time-domain analysis procedure that considers interactions of wave, wind, soil, and structure; (2) to study the behavior of wind turbine using the loading consistent with the field observations of hurricanes; (3) to devise a piezoelectric surface actuation mechanism to aerodynamically reduce the wind forces; and (4) to explore the reconfiguration of the structure to reduce the drag forces. The new time-domain formulation of the wind turbine tower will be integrated with the turbine analysis program FAST developed and maintained by the National Renewable Energy Laboratory. Recent field observations of hurricane characteristics will be utilized to define the loading. Wind tunnel testing of scaled models will also be conducted to obtain necessary parameters for numerical simulation, and to quantify the effects of the piezoelectric surface actuation in reducing the drag forces.Offshore wind farms have enormous energy potential, yet one of the major concerns is vulnerability of wind turbines in hurricanes. The results of this project can reduce risk to wind turbine structures in hurricanes and can contribute to wider adoption of the offshore wind energy. The Principal Investigator will collaborate with the National Renewable Energy Laboratory so that the research outcome is accessible to a wider audience. The research project is integrated with education through involvement of undergraduate and graduate students as well as involvement of underrepresented students through the college's partnership with a minority-serving institution. In order to increase the number of engineers who can work in renewable energy field, college-wide collaboration in renewable energy and the Florida State University (FSU) Office of Distance Learning will be utilized. The outreach of this project will involve high school students in research through the FSU Young Scholars Program. Annual workshops for K-12 teachers will be offered with the help of KidWind. Through these workshops, the teachers will develop teaching modules on wind energy to enhance their science curricula.