Modeling and Dynamic Behavior Simulation Study on Offshore Container Crane Based on ADAMS

In order to study the nonlinear dynamic response of the offshore container crane under sea wave, the virtual prototype model of the offshore container crane is established. Firstly, the 3D geometry model of offshore container crane is built in SOLIDWORKS. Then the model is introduced to ADAMS, and defines the dynamics properties to achieve the complete dynamic model. Finally, according to the different sea conditions, the simulations of the offshore container crane is included to show that the research method proposed in this paper is feasible, which can provide useful reference for the design of the offshore container crane. Introduction The offshore container crane is used to load/unload containers between a huge container ship (called the “mother ship”) and a smaller ship (called the “mobile harbor”), on which the crane is installed. The purpose of the mobile harbor is to load/unload containers in the open sea and transport them to shallower water where they can be offloaded at existing conventional ports, thereby obviating the inconvenience of the traditional crane system [1-4]. Due to the harsh working environment, the offshore container crane experiences more problems than conventional cranes that are fixed into the ground[5-7] .One of the serious problems is the swing of the load caused by improper control of the trolley and influence of external disturbances such as the wave and wind[8-10]. This is a serious problem, because it could cause extensive damage to surrounding devices and systems. Therefore, the dynamic analysis of offshore container crane under sea wave is a challenge to solve. The virtual prototype model of the offshore container crane is established. The rest of this paper is organized as follows: first, the 3D geometry model of offshore container crane is built in SOLIDWORKS. Then the model is introduced to ADAMS, and defines the dynamics properties to achieve the complete dynamic model. Finally, according to the different sea conditions, the simulation of the offshore container crane is included to show the dynamic response. The Establishment of the Three-Dimensional Solid Model The base of the virtual prototype system development is the geometry solid modeling. ADAMS/View software itself provides a graphical tool for 3D modeling while the traditional computer assisted design software like CAD, UG; SolidWorks are quite weak in modeling function and quite inconvenient for dealing with complex mechanical systems. Considering that the offshore container crane is a kind of big assembly with multi-complex parts, meanwhile, in order to obtain the similarity and fidelity between the prototype and the entity, SolidWorks, which is technical solid modeling software, is utilized to build 3D models and assemble to the system mechanism of the offshore container cranes. 6th International Conference on Mechatronics, Computer and Education Informationization (MCEI 2016) Copyright © 2016, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Intelligent Systems Research, volume 130