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Culture Responsibility
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Structural health management system products and engineering services based on digital twins
To improve the structural risk control measures during the operation and maintenance of jacket platform，At the same time, it meets the requirements of engineering digitization. The work of monitoring and digital twinning is carried out for the jacket. The construction of digital basic model is based on the digitalization of the project in the construction stage. The operation status of the engineering facilities is monitored by the structure digital twinning, which provides support for the safety risk control and whole-life cycle integrity management of the deep-water jacket platform structure.
The structural health management system developed based on digital twin technology not only integrates various types of advanced sensing equipment，The corresponding advanced software system has also been developed, which can provide users with comprehensive structural health monitoring and management, and has a broad market prospect.
Through land and sea communication，Real-time display of real-time status of monitoring sensors and equipment at the platform end;
Twin mapping jacket completion and operation and maintenance information can be realized tracking management of construction figures;
The integrated database stores all jacket related structured data and unstructured documents,It is convenient for unified management, search, interaction and application.
Through the combined inversion algorithm of monitoring and simulation database, the twins can show the stress field corresponding to actual environmental conditions;
Support operation and maintenance management according to expert decision, and realize twin-based elaborated evaluation and test plan formulation.
Through long-term data accumulation and feedback design,quantitative comparison of redundancy or conservatism.
Structural response monitoring
Structural response monitoring includes structural stress/strain monitoring, structural weight and center of gravity monitoring, dynamic response monitoring, displacement monitoring and inclination monitoring.
The stress/strain monitoring module is composed of three parts: fiber bragg grating strain sensor, fiber bragg grating demodulator and transmission optical cable. Through the strain sensor arranged on the rod and node, the information of the rod stress and node stress can be obtained.
The structural weight and center of gravity monitoring module is composed of strain gauges, wireless nodes and wireless base stations. The stress measuring points are arranged at the connection position between the upper part of each main leg of the jacket and the module. Through the real-time monitoring of the stress situation of each main leg, and through the inversion calculation, the monitoring of the weight and center of gravity changes of the superstructure is realized.
The dynamic response, inclination and displacement monitoring module includes high-performance acceleration sensor, inclination sensor and displacement sensor. The multi-channel dynamic acquisition instrument is used to synchronously collect the analog output of each sensor to ensure the simultaneity of the collected data among different sensors. Dynamic response monitoring realizes accurate long-term measurement and monitoring of its three-dimensional complex vibration mode; Inclination monitoring can effectively reflect whether there is a risk of uneven settlement; Displacement monitoring is used for displacement early warning and provides real-time motion information for digital twins.
Marine environmental information monitoring
The marine environmental information monitoring module mainly includes wave radar and wind direction anemometer. The marine environmental information monitoring module can directly obtain the relevant information of wave direction, wave height, wave period, surface velocity, surface direction, wind direction and wind speed. It lays the foundation for the environmental load input of the subsequent digital twins.
Digital twin core algorithm
The first-level twin establishes a calculation model close to the actual situation, which is used for a large number of calculations to form a basic database.
The secondary twin is to modify the basic database according to the monitoring data to form an application database for early warning and simulation.
The tertiary twin is an intelligent model that is continuously trained by the secondary twin using big data and deep learning methods under the condition of big data accumulation.
Digital Twin Intelligent Software System
Integrated data management
◆ Design data management to facilitate platform basic data query
◆ Engineering data management, realizing the tracking management of material and weld information in the construction process with the help of 3D model.
◆ Document management, to facilitate the query of documents at all stages of project construction during the operation and maintenance process.
◆ SACS model management, realizing the rapid generation of simple 3D models, facilitating the tracking and application of data in the operation and maintenance management process with 3D tools.
Mocha ITOM
◆ The structure evaluation function, through monitoring and twinning, realizes the feedback of the real state of the platform structure risk. The overall risk index, local member UC, joint fatigue life and other indicators can be given.
◆ Test plan and implementation management: dynamically manage the test plan and test implementation during the operation and maintenance of the platform structure with the help of evaluation, monitoring and twinning functions.
Monitoring and early warning
◆ Realize real-time data/historical data monitoring and display of platform monitoring data.
◆ Data list, line chart, instrument panel and other display forms.
Twin management
◆ Realize the calculation of twin data for IDW interpolation algorithm and display the calculation results in the form of data list.
◆ Support the display and download of SACS files and twin inversion factor files.
3D visualization platform
Establish the 3D simulation model of jacket platform; The mainstream 3D engine is used for visualization software development, and the dynamic multi-resolution LOD technology is used for 3D real-time rendering of the jacket platform scene; Aiming at the problem of 3D visualization of monitoring data and physical field, dynamic texture and multi-channel rendering technology are used to generate 3D cloud images in real time to realize 3D dynamic display of key data.
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