Research On Topology Optimization Technology Of The Key Structure Of Internal Combustion Engine

Internal combustion engine is the major power equipment for engineering machinery.With the development of science and technology, the design and improvement for thecomponents of internal combustion engine using topology optimization technology caneffectively improve the characteristics of the structure. The paper takes topology optimizationof continuum structure as the analytical content, obtains the series of valuable conclusionsthrough investigating the description of the material,implementation methods of calculationmodel, and suppression methods of numerical instability phenomena. According to this theoryresearch foundation, topology optimization technology will be applied to the improvementdesign of internal combustion engine, so as to improve the structural performance and in thesame time reduce quality of the components, and to provide certain reference for topologyoptimization technology is application in engineering practice.First of all, the paper on the basis of contrasting the advantages and the disadvantages ofvarious of material description ways, chooses the SIMP interpolation model of variabledensity method to describe materials; uses optimization criterion algorithm to solve theoptimization problem that based on SIMP interpolation model, thus illustrating the calculationprocess of topology optimization; studies the reason and suppression methods of thetopological optimization numerical instability phenomena, and makes sure the value ofpunishment factor and minimum filter radius by the way of the specific numerical example, itensures that the optimization process is more efficient and the optimization effect is morereliable.Secondly, the topology optimization technology is applied to improvement design of thepiston and the oil pan. The reason why to optimize the piston and the oil pan is in order to build two typical topological optimization models that aiming for lightweight: buildingtopological optimization model based on stress constraint and displacement constraint for thepiston; and building topological optimization model based on frequency constraint for the oilpan. Through calculation and analysis, topology optimization design of two components havebeen achieved ideal improvement effect, and improved their performance. The analysis resultsvalidate and embody the feasibility and the implemented value of topology optimizationtechnology in the structural design of internal combustion engine.