Direct Assessment About Structural Strength Of Inland Floating Crane

Inland floating crane can meet the working requirements of building bridge, salvage, removing barriers etc., and has played an important role to ensure the smooth flow of inland waterway.Because of the special way of working, the hull structure and load of floating crane are characteristically different from other ships. In terms of hull structure, floating crane has special structure such as boom, peg column and boom bearing. In terms of load, the floating crane is made of the self load, hoisting load, and wind load of the derrick mast. Traditional strength calculation method is difficult to get an effective analysis and calculation for such complex and special situation. With the wide application and development of the finite element analysis in various fields of engineering, using the finite element analysis software to simulate the ship structure scientifically, to assess the strength of ship structure by direct calculation has become mainstream of ship design.In this paper, a finite element model of 250 tons of inland lifting salvage ship was modeled by using the finite element analysis software. Through direct calculation method, the structure of the ship under different working conditions, status, the strength and stability are calculated to determine the ship structure and performance of stability and security. First, wave load of the abnormal principal dimensions ship is directly calculated. Secondly, calculation includes the strength and stability of crane boom and hull foundation under floating crane boom lifting process, salvage and placed condition. The strength assessment method and results from the lifting salvage ship provides some references for the hull structure and crane boom optimization for such inland small floating crane.