Parameter's Calculation Of The Analysis Of Large Deformation For Large-Tonnage And All-Terrain Crane

With the development of national economy, the rapid development of China's industrial level. Countries to develop infrastructure in recent years, the base and foundation-building requires a lot of construction machinery, which is bound to promote the rapid development of construction machinery industry. Crane is the most widely used engineering equipment, the most flexible product, is an important part of construction machinery. With the substantial increase in requirements of the building, an increasingly competitive market, cranes and gradually increase the speed of replacement.In recent years, China's gradual emergence of a greater tonnage of the crane, while products are more abundant. Enterprises according to market demand characteristics, and constantly enriching the spectrum of their products. To keep up with the pace of development, design a new tonnage crane time is gradually shortened. Currently, the design of a series of spectra of the upgrade product requires 4 months; to design a series of spectra is not a greater tonnage of new products, from the program to the prototype test is only 1 year or so.To speed up the design speed, shorten design time, business and university cooperation to develop new products, the university's advanced technology resources and the combination of their own experience. We summarize the traditional design experience, learn foreign advanced technology, summarize the characteristics of the product itself meet the design process, and find out for the calculation of the design process. In cooperation with the business for nearly 4 years, we have summed up the product design process, will be divided into program design, detailed design and prototype experiments, a total of three stages. Remove prototype testing, the rest two are computer aided design techniques.The purpose of the program design phase is to develop crane key parameters, such as cranes triangulation, boom length, cross-section parameters, and then calculate the performance. This stage is characterized by a large amount of calculations, mainly in multi-crane conditions. Usually form a complete structure, there are tens of thousands of working conditions. For each condition needs to calculate the strength, stiffness, luffing cylinders, rotary bearing, vehicle rollover stability and leg internal force, a total of six kinds of single control performance. And then integrate the 6 performance, remove the minimum lifting the same magnitude as the final performance. And because the program design phase, the parameters change frequently, so a calculation can not meet the requirements.At this stage, we use a variety of finite element software, try a variety of calculation methods. From the beginning of ALGOR software, static linear methods to the current ANSYS, large deformation analysis. Based on that, we prepared for this stage of the calculation procedures, the model is based on working conditions, automatic assembly, automatic loading, automatic solution, automatically extract the results, according to condition table features multiple loading conditions. Have calculated the multiple series of different products, and the results tested by experiment, and gradually sum up, induction method. In the calculation of different products, the overall approach is consistent, but there will always be small differences. In order to form a unified method to reduce human error, not third-party software modeling purposes, we calculated once again summarize, the characteristics of abstract structure, the statistics of all the calculated parameters of the product, the preparation of a suitable phase of the program The parameters of calculation procedure.The detailed design stage corresponds to the formation of three-dimensional model of the designer during the three-dimensional model to test the local meets strength requirements. Because in this process, local features of each product are great differences, not easy to abstract common features, but can be established based on existing product parameters of the model library. When designing a new product, from the model library to find similar structure, and then modify, build into the structure to meet current requirements.This paper describes the parameters for the process phase of the program. First, for the crane their own structural characteristics, extract and abstract calculation parameters. Then, the preparation based on the performance of finite element software ANSYS computer program. Secondly, the batch computing performance of different tonnage, sum calculation problems and solutions. Finally, the performance of the original program and the parameters of the performance results were compared with the results, analysis of two results of bias.