Blocking net working state monitoring and early warning method in combination of computational mechanics and field monitoring

Abstract

The invention provides a blocking net working state monitoring and early warning method in combination of computational mechanics and field monitoring, which belongs to the technical field of blockingnet working state monitoring. Through port engineering design standards, various loads in the blocking net working environment are classified, various load applied to the blocking net are converted to a main rope of the blocking net. Through the computational mechanics method, the main rope of the blocking net after load conversion is subjected to iterative solution, geometric constraint conditions of the main rope of the blocking net are introduced, the tensioning shape of the main rope of the blocking net under effects of various single environment loads or a combined environment load of the blocking net can be solved and the pulling force at a concerned place is solved. Historical monitoring data of each section of the blocking net are selected for comparison and analysis, the workingstrength limit of the blocking net system under effects of various loads is determined, the blocking net system working reliability safety grade is divided, the alarming value and the risk matrix of each section of the blocking net are determined, early warning on the blocking net working state is realized, and a basis is provided for reasonable maintenance on the blocking net.

Description

technical field [0001] The invention belongs to the technical field of network blocking working state monitoring, and in particular relates to a method for monitoring and early warning of network blocking working state combining computational mechanics and network blocking field monitoring technology. Background technique [0002] Nuclear power plants and other coastal power plants draw seawater as a cold source to cool the units. Safe and reliable water intake at the water intake is crucial to the production and operation of power plants. Monitoring and early warning of the blocking of water intakes is an important task for cold source protection. However, in the blocking monitoring system, the scientific division of the reliability level of the blocking work and the early warning of the reliability of the blocking work are the most critical and core contents of the monitoring work of the water intake blocking system of the nuclear power plant. [0003] At present, the mai...

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Problems solved by technology

[0005] Due to the randomness of the installation of the block and the complexity of the working conditions, there are many uncertain factors. In addition, parameters such as sea waves, tides, local flow fields, and marine biofouling amount change with time (randomly), which makes the work of the block at the water intake of the nuclear power plant reliable. The safety level cannot be obtained through experimental measurement and direct numerical simulation analysis, and the early warning work on the reliability of the blocking system cannot be carried out.

[0006] At present, there is no finite element simulation for flexible mesh structures such as underwater blocks and fishing nets

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