Based On Virtual Prototyping Technology To Shore Before The Bridge Beam Structure Design And Power Analysis

With the development of computer technology, the technology of Virtual Prototyping also developed rapidly since the 80's of the 20th century. By using prototyping model, Engineers can analyze some kinds of dynamic performance under various working environments and refine the designing concept of prototype. Therefore, the design method of traditional physical prototype is being replaced by the method of digital model.At present, container crane is mainly equipment to load and unload cargo. With its development of large, high-speed and automation, the reasonable design of structure is becoming more and more important. During the continually working process of container crane, the movement of rising, braking and so on happened simultaneously. As a result, the computing of the coupling movement at two directions is considered. On the other hand, the influence of impact load on the structure is becoming more and more important. During the whole process, the position of the trolley on the front of boom is a very important working position on the cantilevering boom. At this site, the dynamical response is produced with the trolley rising, and will have a great influence to the structure.Based on the application of virtual prototyping technology in the structural design of the container crane's boom, some work is done in the following few aspects in this paper.(1) Based on the modeling method of parameterizing and the secondary development technology of 3-D model, the 3-D model template of the boom is build under Pro/E environment. The parameterizing interface is customized by VC language in Pro/TOOLKIT and the secondary development of the boom is completed.(2) By using the modeling method of the coupling machinery system about rigid and flexible bodies, the model of coupling system of the boom including rigid and flex bodies is set up. Through the digital interface between ANSYS and Pro/E,the model of the boom is imported into ANSYS from Pro/E. Under ANSYS environment, the boom is meshed and the mode neutral file (*mnf) is produced. Then the file is imported into ADAMSA/IEW and rigid body is converted into flexible body. At the same time, under ADAMSA/IEW environment, the rigid bodies, such as the trolley, roller, spreader, container, etc are built. Finally, the constraint is added and the whole coupling system of boom about rigid and flexible bodies is finished.(3) Through the describing of the process of the trolley's moving on the boom, the load on spreader is analyzed. Moreover, the dynamic equation is established about the structure of boom based on the analysis of working process.(4) The dynamic simulation is researched on the base of the dynamics of multi-body systems.