Stimulated Ice Force Vibration Measurement And Monitor On The Oil Platform In Bohai Bay

It brings abundant energy sources in cold sea's oil and natural gas exploitation, at the mean time, sea ice, one kind of environmental load exits in high latitude, plays an important role in the busywork and production in the sea-ice covered regions. As a result, a lot of research has been done on the physical and mechanical property of sea-ice itself, interaction between sea ice and offshore structure and sea ice numerical simulation and forecast for satisfied the ongoing engineering requirements.Offshore platform vibrates severely under the crashing and impacting of sea ice, which is a main danger to the security of the productive devices and the structure itself, also endangering the health and normal living of the staff. Obviously to evaluate exact and timely forecast of the stimulated ice force is an effective way to decrease and prevent sea ice disaster. The dynamic response of the platform caused by simulated sea ice is close related with ice type, ice thickness, ice temperature and the direction and velocity of the ice flow. So it is very necessary to establish an advanced measurement system about vibration caused by simulated sea ice, which can provide solid support for structural design in cold region and tell the mode of sea ice disaster. However, sea ice observation, as one of the key parts of the simulated sea ice vibrates measurement system, is not only the base of the ice numerical simulation and forecast but also contents of sea ice management in the ice period. Therefore the properties of sea ice can be obtained at large through fixed observation on the platform which can gain benefit for ice loadanalysis, sea ice numerical simulation and forecast.In this paper, an elaborate introduction about the vibration measurement system of Offshore structure that caused by sea ice have been given, also sample analysis of the obtained data, and the analysis of dynamic response of oil platform by Finite Element Method is delivered in the last including a concrete case solution based ANSYS.