1. Department of Mechanical Engineering, Hangzhou City University, Hangzhou 310015, China
2. Huadian Electric Power Research Institute, Hangzhou 310030, China
3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
4. Guangdong Huadian Fuxin Yangjiang Offshore Wind Power Co., Ltd., Yangjiang 529500, China