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Identification of modal parameters of a floating system from impulse motion

机译：通过脉冲运动识别浮动系统的模态参数

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摘要

The modal parameters of a scale-modeled discus-shaped data buoy in heave and pitch are estimated from the experimentally measured impulse response time histories. The use of phase-time, time-frequency domains for derivation of natural frequencies and damping are demonstrated in this paper. The phase-time method is based on the Hilbert transformation, whereas, the time-frequency method is based on the continuous wavelet transformation (CWT) of the measured time histories. In addition, the conventional time and frequency domain method of modal parameter estimation is also adopted for the comparison of results. The details of the model, test procedure, analysis and results are presented in this paper. The modal parameters obtained through CWT are found to be accurate compared to that obtained from the time and frequency domain analysis.
机译：从实验测量的脉冲响应时间历史记录中，可以估算出波浪和俯仰中的比例模型铁饼形数据浮标的模态参数。本文证明了使用相时域，时频域来推导固有频率和阻尼。相位时间方法基于希尔伯特变换，而时频方法则基于所测时间历史的连续小波变换（CWT）。另外，还采用了模态参数估计的传统时域和频域方法进行结果比较。本文详细介绍了模型，测试程序，分析和结果。与通过时域和频域分析获得的模态参数相比，发现通过CWT获得的模态参数是准确的。

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