The Main Beam Of The 50t/28m Gantry Cranes' Finite Element Analysis And Structural Optimization And Design

With expanding and developing of the national economic construction and infrastructure construction, the development of gantry cranes has been greatly promoted, Domestic manufacturers in their respective areas expand product range and optimize product performance, by introducting advanced technology to develop their own products or the foreign advanced technology to improve product quality. Due to the reasons for our own and the gap between foreign advanced leve, gantry cranes development subject to certain restrictions, mainly in the area such as the large-scale, reducing the weight of its own,reliability,ergonomics,operating environment.Compared with traditional design method, design methods of cranes have the complexity of the design process and poor accuracy of the design based on classical mechanics and mathematical semi- theory, by using semi-empirical design method,analogy and intuitive method. In today's rapid development of computer, the design which isn't completed by manual calculation can be completed through the computer easily, such as large-scale finite element analysis,Optimization Calculation. With the application of computer-aided engineering (CAE) technology, a variety of CAE softwares have been widely applied rapidly. ANSYS is one of the best of today's large-scale finite element softwares, which is used by vast numbers of engineers and technicians and become an indispensable tool for modern design of cranes.On the basis of the the mass the actual data of production, author study the actual situation of gantry cranes in Bridge Crane Limited liability company Zhuzhou, Hunan. The research on this subject has great theoretical significance and engineering value.1.The gantry crane's steel girder model is set up by using large-scale three-dimensional modeling software UG.2.By using large-scale finite element analysis software ANSYS, main beam and the most dangerous location subject-to finite element analysis, getting the result of the strength and stiffness of the main beam in the rated load.3.Using ANSYS parametric design language APDL to optimize the design of the main beam, the best structure parameters of the main beam is obtained. After optimization,, intensity and deflection are improved significantly and stress distribution is more reasonable. Compared to the original beam, the weight is reduced about 15.7%, so this reduce the weight of the structure. The cost of production of enterprisesis is not only saved, but also the operational reliability of gantry cranes is increased.