... ABSTRACT The motions of the vessel and the offshore platform topsides are quite complex during lifting operations by the dynamic positioning (DP) crane vessel. To ensure the safety of the operation, it is necessary to maintain the stability of the topside movement to avoid collisions between...

... ABSTRACT To utilize the ocean space, i.e., the offshore oil and gas development, the renewable energy, crane lifting operations in the ocean are crucial for constructing offshore structures and installing facilities on the seafloor, and safety and availability of the crane lifting operation...

... that the allowable sea states can be increased significantly by properly choosing the fender support structure. This indicates the huge potential of improving the operability of such operations. INTRODUCTION Offshore lifting operations are the most used methods to install offshore and subsea structures...

... ABSTRACT To ensure the safety of lifting operation, maintaining the stability of crane platform is an important and complicated task. A method that can analyze the stability of the crane platform during lifting operation is put forward, and some of the considerations in the analysis process...

... ABSTRACT The floating crane vessel can be applied to install the offshore topside module of the platform during the lifting operations. If the motions of the topside are large due to the severe ocean environments, the topside will frequently collide with the jacket structures, which...

... Abstract This paper addresses numerical simulations of the lifting operation of an offshore wind turbine monopile foundation considering both shielding effects from the vessel and the spreading of the waves. A numerical model of the coupled monopile-vessel system is established. The disturbed...

... using truncated hoisting system is introduced. Lifting and lowering operations were evaluated under both regular and irregular wave conditions. At first, vessel motion and wire tension responses during deep-water lifting operation are investigated by white noise and regular wave tests. The effect...

... Abstract Stability mechanism of the offshore wind turbine installation jack-up vessel was studied considering the impact of environmental loads and lifting operation. The stability performances of jack-up vessel under lifting operation were analyzed, which include buckling stability of leg...

... Abstract In this paper, the shielding effects from an installation vessel during lifting operations are investigated. The study compared the lifting operations of two commonly used offshore wind turbine substructures: the monopile and the jacket substructure. The fluid characteristics near...

... Abstract One of the main functions of an OSV is for heavy lifting. Therefore, predicting dynamic loads in various operation conditions is one of the crucial points of the lifting operation of an OSV. To do this, crane-lifting simulation precedes real operation to verify the safety...

... in operation. Based on these models, the hydrodynamic performance of 4000t lifting operation and 10% pipeline installation, taking the couple effect of lifting module and pipeline, was predicted and compared with that of HYSY 201. The results show that roll motion of the new-designed vessel improves...

... time history operation interaction time domain construction vessel vessel motion beam sea condition wave height lifting operation sea condition lifting configuration pendulum effect boom tip acceleration lewek constellation daf value parametric study Effect of Lifting Heavy Object...

... & control, installation of stiffening rings, prefabrication and installation of skirt sleeves. platform dimensional survey crane construction sequence prefabrication lw3-1 cep jacket operation central launch truss installation lifting operation subsea system dimensional control upstream...

... accurate calculation of the dynamic response in the cable is obtained by a time-domain analysis applying a nonlinear FE computer program. static weight lifting operation coefficient crane tip equation cable amplitude boundary condition vertical motion transfer function calculation...

... lifting analysis vessel motion template subsea structure dynamic loading operation requirement hydrodynamic coefficient lifting operation coefficient installation lift line tension applicable deep water simulation limitation Proceedings of the Fifth (1995) Internatiofllli Offshore...

... ABSTRACT A statistical method for the evaluation of offshore heavy lift operations characterized by a low hoisting velocity, is presented. The resulting expressions give the probability of undesired events occurring during the operation. These are identified in this case as snatch loads from...