Research On Optimization Scheme Of The Overall Structure Of The Crawler Pipe Crane

The Crawler Pipe Crane is special hoisting machine for the large and medium pipeline construction. It main characteristics are the high lifting ratio, the wide working range, little grounding pressure and can be achieved a variety of purposes by added other additional equipment. As the new pipeline building of oil and gas in China, the demand for pipe crane increases every year, its performance requirements are also increasing.Crane boom is an important component, primarily for supporting the body and changing the amplitude. The boom weight occupies a larger proportion in the whole crane weight and it is also the major factors to determine the capacity of lifting weight. Therefore, rational design of the boom structure, increase the boom lifting capacity from unit weight has become an important part of the crawler pipe crane design, which put forward the more stringent requirements in the boom design, that is to ensure that the crane has sufficient strength and rigidity, while the crane should also have and also have a lighter weight.This paper focuses on a company's DG45-based crawler pipe crane as the research object. The three-dimensional model of pipe crane is created by the three-dimensional mapping software. The three-dimensional digital model and finite element parametric model of the pipe crane's boom are established by ANSYS workbench software. After the analysis of the crane static strength, stiffness, modal vibration analysis and finite element optimization in three basic conditions on finite element theory, the stress distribution, vibration and other data are given. Then, using the optimization analysis module in ANSYS workbench to optimize the design of the pipe crane's boom, and the crane's boom reached a more reasonable geometry of main chord. The checking of static strength and static stiffness were also done on the optimized boom, and the result indicates that the optimized pipe crane boom to meet the performance requirements. And it verifies the feasibility of the optimization results.Based on the analysis of the boom, the optimization scheme of the overall structure of pipe crane was proposed. This scheme was primarily achieved by optimizing the boom weight and changing location for the hydraulic winch of the pipe crane installing. As the location of the hydraulic winch changing, a simple optimization on the counterweight device was also done. Without changing the pipe crane body, the anti-overturning stability was also checked by the torque method in this scheme. After the overall structure optimized, the analysis and comparison of stability was also done.Research showed that: ANSYS workbench for finite element analysis design can save development time and achieve high simulation accuracy. It could improve the level design of acquaintance mechanical structure and achieve a more reasonable to meet the evolving needs of today's society, which is important for practical engineering. Excel software can be used to the stability analysis of the overall structure of the pipe crane. In the same lifting circumstances, the stability of the pipe crane after overall structure optimizing has been improved. And the whole weight of pipe crane has been reduced without the lifting circumstances and stability changed. The research results can provide a theoretical basis for the design of similar products.