Research Of Key Technology In Digital Design And Analysis To Harbour Machinery

For the past few years, the affection of ports and docks has become more important in the transport industry with increase demand of port machinery of the market. In the other side, the requirement of machine, especially the bridge-type grab ship unloader, is more likely to be stricter than before. Currently the design for the bridge-type grab ship unloader is mainly based on the traditional methods and the static design method, however the disadvantages of these two methods are obviously to find such as lack of deep analyzing, complicated modification work, longer design period, having been unable to adapt to the developing demand of marketing economy. On account of these drawback mentioned, this article proposed a kind of port machinery digital design. At the same time, 3D structural design, motion simulation and creating drawing based on UG are generally used by companies on the process of port machinery digital design with model information saved and transferred to the production department. In other aspects, ANSYS is employed on the metal structure analysis and static analysis including strength and stiffness analysis. On the basis of the former, this article combined the both sides in the exploiting environment of Visual Studio 2010, adding the finite element dynamic analysis and the technology of structural optimization design, which realized the digital design and analysis. The main research results are concluded as follows:(1) Base on secondary development technology of UG, it establishes metal structure geometric parametric model of bridge-type grab ship unloader. And base on secondary development language APDL of ANSYS, it establishes metal structure finite element parametric model of bridge-type grab ship unloader. In Visual Studio 2010 development environment, combining two kinds of technology develop the user-friendly parameterized systemic design. In this system, the corresponding parameterized models will be established with inputting relevant parameter on the main interface.(2) On the basis of building the parametric analysis and product work program between practical environment of harbors and wharfs and bridge-type grab ship unloader, to establish load combinations and operating modes, according to crane design specification(GB/T3811-2008). In addition, the static analysis including strength and stiffness analysis and dynamic analysis including the modal analysis and the harmonic response analysis were applied to the metal structure of bridge-type grab ship unloader.(3) Base on modern optimal design theory, it’s applied to the girder of bridge-type grab ship unloader. Taking the cross sectional area of girder structure as the least optimization objective and the analysis results with design requirements as constraint condition. With the help of Particle Swarm Optimization and MATLAB, setting up and solving optimized math models to achieve the goal of optimization.The parametric modeling, the static and dynamic analysis and optimal design applied in the metal structure of bridge-type grab ship unloader achieve digital design on harbors. Furthermore, this research not only makes progress on improving the design efficiency and using material properly, but also on reducing the manufacturing cost and enhancing market competitiveness. It’s no hard to find out these research results will impose great impaction on bridge-type grab ship unloader and other products of port mechanical.