The Design Optimization Cross-section Configuration Of Slender Beam Structure

This paper is under the conditions of the space structure constrained and meet thestructural bearing capacity, to minimize the weight of the structure. While the originaldesigned wooden solid circular section beam is unable to meet the design requirements.Therefore, in order to meet the required, based on the finite element software ANSYSplatform, the structural properties (stiffness, frequency, stability) is the object, usingfinite element analysis method to optimize different section of beam structureconfiguration. The main work and content are as follows:Comparison of the structure properties of different cross-section beam. Analysisand comparison the stability of the commonly used simple cross-section beams structureunder torsion, such as: Quadrangular, Triangular, Circular, and the derivative on thebasis of these three sectional cross-sectional shape (Combination form, Tapered).Thecalculation results show that the ring section beam obtain the best stability. With thesimple circle structure for benchmark, define the dimensionless performance scalefactor, describing different structural properties compared to the distinction between thesimple circle structure. Analysis of the performance of the sandwich structure, compareperformance difference between corrugated sandwich cylindrical structure and simplecircle structure. Results show that the sandwich circular structure have better stability,and according to this conclusion, the sandwich structure are discussed.The research of tetrahedral metal lattice sandwich cylindrical structure. With samediameter and quality circle structure for the comparison object, with the relative densityof lattice unit cell for parameters, under tensional load, analyze the influence ofdifferent lattice cross-sectional size and shape, the different tetrahedral lattice unit cellconfiguration as well as the different circumferential lattice unit cell buckling behaviorof the tetrahedral lattice sandwich cylindrical structure. Consider under such as qualityand variable mass calculation comparison. Finally, in the case of equal mass, analysis ofthe ratio relationship between inner and outer skin effect the performance of thestructure in the condition of the lattice relative density for a constant value. The resultsshow that: Optimized lattice-section shape to enhance the carrying capacity of thelattice sandwich cylinder space is limited; The hollow lattice-section is better than solid section; The influence trend of the number of circumferential lattice unit cell of latticesandwich cylinder substantially the same, overall, the more of circumferential latticeunit cell number, the more obvious superiority of carrying capacity the lattice sandwichcylinder compared to ring structure; It can effectively enhance the carrying capacity ofthe lattice sandwich cylinder when the outer skin values is1.5times than the inner skin.