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振动模态参数识别的Ibrahim法是近年来振动参数时域分析法的一种新发展。本文简要阐述了方法的原理和讨论了方法的实施,并以两万五千吨货轮“郑州号”在遭受波浪拍击后的船体自由衰减响应的应变记录为实例进行了首阶和二阶固有频率和阻尾的识别,并与传统的自由衰减记录的人工识别结果作了对比,说明了该方法在船体振动模态参数识别方面的应用前景和需要继续解决的问题。
The Ibrahim method of vibration modal parameter identification is a new development of time domain analysis method of vibration parameters in recent years. In this paper, the principle of the method and the implementation of the method are briefly discussed. The first and second-order inherent implants are recorded with the strain record of the ship’s free-decay response of 25,000-ton freighter “Zhengzhou” Frequency and end-of-tail recognition. Compared with the traditional artificial recognition results of free attenuation records, this paper shows the application foreground of the method in the vibration mode parameter identification of hull and the problems to be solved.