Offshore platforms are of high strategic importance,whose preventive maintenance is on top priority.Buoyant Leg Storage and Regasification Platforms(BLSRP)are special of its kind as they handle LNG storage and process...Offshore platforms are of high strategic importance,whose preventive maintenance is on top priority.Buoyant Leg Storage and Regasification Platforms(BLSRP)are special of its kind as they handle LNG storage and processing,which are highly hazardous.Implementation of structural health monitoring(SHM)to offshore platforms ensures safe operability and structural integrity.Prospective damages on the offshore platforms under rare events can be readily identified by deploying dense array of sensors.A novel scheme of deploying wireless sensor network is experimentally investigated on an offshore BLSRP,including postulated failure modes that arise from tether failure.Response of the scaled model under wave loads is acquired by both wired and wireless sensors to validate the proposed scheme.Proposed wireless sensor network is used to trigger alert monitoring to communicate the unwarranted response of the deck and buoyant legs under the postulated failure modes.SHM triggers the alert mechanisms on exceedance of the measured data with that of the preset threshold values;alert mechanisms used in the present study include email alert and message pop-up to the validated user accounts.Presented study is a prima facie of SHM application to offshore platforms,successfully demonstrated in lab scale.展开更多
为及时对天线罩结构老化及损伤情况预警,需要实时、稳定地对天线罩结构状态进行监测。本天线罩结构损伤分析系统基于自动频域分解法(Automatic Frequency Domain Decomposition-AFDD)和卡尔曼滤波算法,使用加速度传感器和采集仪,通过对...为及时对天线罩结构老化及损伤情况预警,需要实时、稳定地对天线罩结构状态进行监测。本天线罩结构损伤分析系统基于自动频域分解法(Automatic Frequency Domain Decomposition-AFDD)和卡尔曼滤波算法,使用加速度传感器和采集仪,通过对多组实时采集的加速度传感器数据进行处理,得到反应天线罩结构老化和损伤的各种相关数据,并实时将天线罩结构状态在人机界面显示、对异常状态预警。在此基础上,分析了由加速度传感器输出数据经处理得到的不同参数对于天线罩损伤情况的敏感程度,建立多参数的联合预警机制,实现系统面对不同损伤时的实时判断和预警。展开更多
文摘Offshore platforms are of high strategic importance,whose preventive maintenance is on top priority.Buoyant Leg Storage and Regasification Platforms(BLSRP)are special of its kind as they handle LNG storage and processing,which are highly hazardous.Implementation of structural health monitoring(SHM)to offshore platforms ensures safe operability and structural integrity.Prospective damages on the offshore platforms under rare events can be readily identified by deploying dense array of sensors.A novel scheme of deploying wireless sensor network is experimentally investigated on an offshore BLSRP,including postulated failure modes that arise from tether failure.Response of the scaled model under wave loads is acquired by both wired and wireless sensors to validate the proposed scheme.Proposed wireless sensor network is used to trigger alert monitoring to communicate the unwarranted response of the deck and buoyant legs under the postulated failure modes.SHM triggers the alert mechanisms on exceedance of the measured data with that of the preset threshold values;alert mechanisms used in the present study include email alert and message pop-up to the validated user accounts.Presented study is a prima facie of SHM application to offshore platforms,successfully demonstrated in lab scale.
文摘为及时对天线罩结构老化及损伤情况预警,需要实时、稳定地对天线罩结构状态进行监测。本天线罩结构损伤分析系统基于自动频域分解法(Automatic Frequency Domain Decomposition-AFDD)和卡尔曼滤波算法,使用加速度传感器和采集仪,通过对多组实时采集的加速度传感器数据进行处理,得到反应天线罩结构老化和损伤的各种相关数据,并实时将天线罩结构状态在人机界面显示、对异常状态预警。在此基础上,分析了由加速度传感器输出数据经处理得到的不同参数对于天线罩损伤情况的敏感程度,建立多参数的联合预警机制,实现系统面对不同损伤时的实时判断和预警。
