为掌握JZ9-3WHPB平台的动力特性，根据该平台结构特点设计安装了具有远程控制功能的平台冰激振动监测系统，对振动信号实施实时监测和记录。利用短时傅里叶变换对振动信号进行分析，研究结构振动时变特征和模态频率特征。通过比较上下甲板振动信号的相位关系以及信号的滤波处理，分析所测得振动模态的振型特点。在对振动最大值、振动持续时间以及平台水域潮流潮位进行统计分析的基础上，结合平台结构设计，分析了平台的抗冰设计缺陷，给出了防冰建议。

Based on the structure and layout of the untended JZ9-3WHPB platform, remote controllable ice induced vibration monitoring system was designed and installed on JZ9-3WHPB platform to record the vibration of the structure so as to learn its dynamic characteristics. Short time Fourier transform was employed to study the temporal variations and mode frequencies of the vibration. Vibration mode was analyzed by comparison of the phase difference between the vibrations of the upper and lower deck and applying bandpass filtering to the signal. Based on the count and analysis of the maximum amplitude and duration of the vibrations, tide and current of the water, and the structure of the platform, the defects of anti-ice induced vibration structure were analyzed, and ice resistant proposals were presented.

兰志刚（1963— ） ，男，山东青岛市人，高级工程师，主要从事海洋工程环境监测和海洋工程防腐工作