Floating Dock Dynamic Analysis as a Study for Fish Boat Dock Design at North Jakarta

• Main Author: (15514043), Widianto
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31581
• Institution: Institut Teknologi Bandung

<p align="justify">Floating dock uses mooring system to hold its position against environmental loads. There are many variations of mooring system configuration, from the tautness of the mooring line (taut, semi-taut, catenary), the mooring line diameter, and the use of sinker/clump. All three of those variations is then analysed to see the floating dock’s reponse in configuration variations iteration. The correlation between configuration variations and floating dock response is then used as a basis for determining final mooring configuration. Environmental loads in this study is restricted to wave load generated by wind generated wave and current load generated by tidal current. Floating dock model is simulated using regular wave and random wave separately, where in regular wave, the correlation between floating dock response and wave is analysed. The final configuration modeled in 12 loadcases vary in wave (operation and storm condition), water depth (MLLW and MHHW), and wave attack angle (parallel to dock, perpendicular to dock, and parallel to mooring line). Floating dock model and analysis in this study use API RP 2SK code as a reference, where mooring dynamic analysis is divided into 2 condition which is intact and damaged condition. In damaged condition, 1 mooring line is assumed broken. Damaged analysis is also divided into 2 loadcases, first loadcase is when the line with the highest tensile force in intact condition is broken, second loadcase is when the line which cause the highest added tensile force to the line with the highest tensile in intact condition is broken. Analysis of floating dock’s response use 2 constraints, first is moring line tensile force constraint (so that the tensile force of the mooring line doesn’t exceed its capacity), and the seccond is heave acceleration constraint (so that the floating dock’s response doesn’t cause seasick/motion sickness). The results of the final configuration analysis concludes that the floating dock’s response does not exceed tensile force and heave acceleration constraints, but with note that the semi-taut configuration used in this case causes increase in floating dock’s draft along with increasing water depth (cause by tidal). The increase in floating dock’s draft risk it to be submerged when the water depth is highest (MHHW) in combination with high wave height. There are 2 solutions to this problem, first is to increase the freeboard length of floating dock, and second it to increase the length of the mooring line as to let the floating dock float higher. Use of both solutions require reanalysis of the floating dock.<p align="justify">