Sharif Digital Repository

Since oil is the essential foundation of Irans economy and our country has access to deep water, the extraction of oil from the deep water is essential to our country. So far, due to the possibility of oil exploration in the shallow water of the Persian Gulf, need to invest in deepwater oil industry has not been one of the priorities. However, it seems that in the near future we will need to invest in deepwater. Among subsea structures which we need to use to extract the oil in deepwater, we can mention wellhead manifolds that are used to expand the oil field, optimisation of pipeline length, gathering and distribution of production and injection of water or gas into the wells. In some cases... 

Every day requirements for oil, gas and exploration in deep water have pushed offshore industries into deeper water. Oil production is expensive, so a designed platform should be cost saving. The clear and logical part is that, testing a model will be an important part of these kind of researches. In this thesis we are trying to obtain numerical results from ANSYS AQWA and experimental results for surge, heave and pitch motions, then compare experimental results with numerical one. Second order effects are ignored in designs and experiments because of laboratory conditions and limits that we are faced with in there. 1/250 scale ratio has been chosen because of limits. First we get into...