Dynamic response measurement of offshore platform model by FBG sensors

The dynamic response of offshore platform under seismic excitation is a coupled vibration of liquid and solid interaction. In recent years, the computation of dynamic responses and design of offshore platform have attracted the attention of many researchers. This paper presents a shaking table test of offshore platform model scaled down an actual one. Fiber Bragg grating (FBG) is a promising measurement technology for its superior ability of explosion proof, immunity to electromagnetic interference and high accuracy. Some FBG sensors and strain gauges were used to monitor the dynamic response of offshore platform model. The maximum working frequency of FBG was calculated according to its dynamic strain response. Based on the theoretical and experimental results, it can be concluded that FBG sensor is superior to strain gauge and satisfies the demand of dynamic strain measurement.