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为保证海洋平台服役期间安全运行,以实验室海洋平台模型为研究对象,开展有关振动监测技术的试验研究。通过预制损伤等物理手段,模拟海洋平台模型完好与损伤状态。使用加载设备对平台模型加载,采集其在不同加载角度、频率与增益下的动力响应。对振动传感器校准后,利用传感器、信号调理仪以及信号采集软硬件设备,组成监测系统。分析试验数据,调整相关试验参数,选取最佳信号采集状态。选取双谱分析法对试验数据进行信号处理,得出平台模型完好与损伤状态的数据变化。结果表明:根据振动监测数据的双谱模量与频率分布,能够识别损伤。
In order to ensure the safe operation of the offshore platform during its service, the experimental study of the vibration monitoring technology is carried out with the laboratory offshore platform model as the research object. Through the prefabricated damage and other physical means, the model of the ocean platform is simulated and damaged. The loading device is used to load the platform model and acquire the dynamic response under different loading angles, frequencies and gains. Vibration sensor calibration, the use of sensors, signal conditioning and signal acquisition hardware and software equipment, the composition of the monitoring system. Analysis of experimental data, adjust the relevant test parameters, select the best signal acquisition state. The bispectrum analysis method is used to signal the experimental data, and the data changes of the platform model in good condition and in the damaged condition are obtained. The results show that damage can be identified based on the bispectrum modulus and frequency distribution of vibration monitoring data.