Study On Construction Accuracy Control Technology For Large Dual-fuel Container Ship

The proportion of large-scale container ships using clean energy is increasing,and membrane-type LNG tanks have also been used as fuel storage tanks.The cargo and fuel tanks of container ships have high accuracy standards,and their forming accuracy has a vital influence on subsequent construction.In recent years,domestic shipyards have invested more manpower and material resources in precision management.The precision management level and control technology have made great progress,but there is still a gap with the world’s advanced shipyards.In order to win the initiative in the fierce market competition,shipyards must consolidate basic technology,break through technical barriers,and strive for more high value-added orders.This thesis is mainly based on the 23000 TEU and 15000 TEU ultra-large dual-fuel container ships undertaken by Jiangnan Shipyard(Group)Co.,Ltd,using advanced measurement equipment such as three-dimensional laser scanners to scan and measure the fuel tanks and cargo tanks,and quickly obtain the fuel tanks through the study of data extraction methods Main dimensions,flatness and coordinate information of cargo hold rails.Using the grid to take points,the extreme value of the fuel tank flatness is extracted,and the flatness state of the whole tank is analyzed.By studying the guide rail deviation distribution after the cargo hold is formed,the actual construction accuracy status can be obtained.Through the analysis and research of the accuracy data of the construction process,the accuracy reference coordinates were set targeted,the implementation scheme of OTS and segmented boring was optimized,and the accuracy of the subsequent ships in the series was improved.