Research On Comprehensive Optimization Method For Main Beam Structure Of Ladle Crane

With the development of human society and the progress of science and technology,the over exploitation and consumption of energy and resources has become a major obstacle to the development of human economy and society.Lightweight has become a key issue of widespread concern.As far as the ladle crane is concerned,its poor working environment,diversified structures,complicated forces,and large weights have made it difficult to optimize the design of the main beam structure of a ladle crane that is secured by safety.Engineering structure optimization can effectively reduce the weight of materials,reduce manufacturing costs,and improve energy efficiency.At the initial stage of design,topology optimization can provide designers with a conceptual model,so that the overall layout is the most reasonable and optimal.By optimizing the size after the topology optimization,the space for optimization is greatly increased,the limitation of only the size optimization is broke through,and the optimization efficiency is improved.Therefore,this paper takes the cast-girder box girder as the research object,adopts the variable density topology optimization method,and optimizes the topology of the crane girder web structure through the large general finite element software ANSYS.through the large general finite element software ANSYS,topology optimization of ladle crane girder web structure.According to the conceptual model,the web structure is redesign was carried out,and the optimization of the size of the girder section was carried out in conjunction with the particle swarm optimization algorithm.The main contents of this article are as follows:(1)The study of structural optimization theory knowledge was introduced.The concept and classification of engineering structure optimization were introduced.The principle and design method of topology optimization were studied.Using the variable density topology optimization method based on the SIMP interpolation model,and discussing the feasibility of the first topology optimization and the re-size optimization of the main beam of the casting crane is discussed.(2)The initial design of the metal structure of the ladle crane was carried out using the allowable stress method.According to the structural parameters,work characteristics and working properties of the ladle crane,load carrying capacity,3S(strength,stiffness,stability)bearing capacity were verified,and the ANSYS-APDL language was used at the same time.The static analysis of the main beam of the cast crane was carried out to verify the rationality of the preliminary design.(3)The variable-density method is used to establish the topological optimization mathematical model of the main beam of the casting crane,that is,to determine the design variables,objective function,and constraint conditions.With ANSYS finite element analysis software,the topology of the girder web structure of the foundry crane is optimized,and the conceptual model after topological optimization is obtained.The new type of main girder web structure is designed through the conceptual model and its feasibility is verified.(4)Based on the standard particle swarm optimization algorithm,a mathematical model for optimizing the section size of the main girder of the foundry crane was established.Optimize cross section of the girder of the ladle crane after topology optimization.After finite element analysis and theoretical calculation,the optimized main girder meets the design requirements.And effectively reduce the weight of the cast crane main beam structure.