相位信息是船舶水动力特性的重要方面之一。为了高精度识别船模试验测量信号中的频率成分属性，文章对测量信号作分离和延时处理，将全相位时移相位差法应用于动态信号的处理分析之中。通过仿真信号分析表明，该方法具有良好的抑制频谱泄漏性能和相位分析能力，且谐波分析能力强、抗噪性能好，在信噪比大于10 dB的噪声环境下参数识别的精度仍较高。对两船近距航行模型试验，应用该方法对全拘束船模的垂荡力和艏摇力矩信号开展了频谱分析，分析得到的一阶波浪力幅值及相位差表现出较好的规律性。%Phase information is one of the important aspects of ship hydrodynamic characteristics. In order to identify the signal characteristic parameters with high accuracy in ship model test, the all-phase time-shift phase difference approach is introduced into the data processing of dynamic signals. The experimental signal here is separated into two time sequences and one sequence is expressed as the delay representation. Simulation results indicate that this approach is capable of reducing the spectral leakage greatly, extracting the phase information effectively, and is advantageous in spectrum analysis for harmonic components. When the signal-to-noise ratio (SNR) is more than 10dB, the precision of discriminated parameters is still satisfactory. In the tests of two ship models advancing in close proximity, the heave force and yaw moment signals of a captive model are analyzed in frequen-cy domain by this approach. For the first-order mode, the processing results show strong regularity in the amplitudes and phase difference of heave force and yaw moment.
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