Design And Structural Strength Analysis Of The Bow Platform Of 22000T Lift-Dock

As a result of the "America first" policy of unilateralism and protectionism,the global trading system is facing its greatest crisis since the Second World War.However,most of the G20 countries have taken a clear stand against trade protectionism and agreed to continue to deepen trade and investment cooperation and jointly promote sustainable economic growth.The world economy will inevitably continue to globalize and the demand for the transport of commodity goods will remain an important part of the world economy and trade.Ship is the main means of trade transport,its maintenance and maintenance is a long-term demand.Floating dock is the most effective and necessary hardware facility for ship repair and maintenance.It is also an important embodiment of shipyard’s ability and competitiveness.Most ship maintenance and repair cycles are short,so the dock needs to sink and float up frequently,so that ships can enter and leave the dock,and its head platform is the only area for all kinds of vehicles operating in the dock.The front platform is an extension of the deck of the lifting ship,and is a single deck overhanging structure supported by trusses.Due to the long-term complex load,it is easy to generate deformations such as depressions and folds.Therefore,the structure of the bow platform cannot only be designed according to the specification requirements,but also needs to be analyzed and checked for structural stability and dynamic response performance.This thesis takes the forward platform of the 22,000-ton buoyancy dock as the research object.According to the functional requirements and relevant specifications of the floating dock,the plane shape and structural layout of the forward platform are designed,and the materials and specifications of the structural components are calculated and determined.The finite element model is established and the stress and deformation results under three loading conditions are calculated and analyzed.The modal analysis and structural stability analysis of the forward platform are carried out,and the dynamic performance of the forward platform is verified.In this thesis,the structural design calculation,finite element structural strength analysis,structural modal analysis and structural stability checking system design and analysis research are carried out for the dock’s bow platform,which has certain guidance and reference significance for the design,strength calculation and use capacity of the dock’s bow platform in the future.