Analysis And Optimization Of The Layout Scheme Of Flame Tube Support

The working environment of flame tube which is thin-walled structure is extremely bad. Mechanical load andthermal load under complicated working process would cause local large deformation damage to flame tube.Detailed analysis on the degree of deformation and strength is needed in the design phase. In this paper, researchon the annular combustion chamber flame tube is carried out as follows:1. The common structure form of domestic and international aero engine combustion chamber weresummarized. Supporting layout of flame tube was analyzed, combined with simplified method of supporting andpositioning components. Four kinds of typical support layout form annular combustion chamber were concluded.2. Geometry variable parameters were selected. The three-dimensional flame tube model was establishedin ANSYS Using the APDL language. Four typical support layouts were simulated respectively applied boundaryconstraints.3. The feasibility of using shell element to replace the body element finite element in calculation ofthin-walled structures was verified in ANSYS. Axial and radial deformation, maximum stress analysis of theflame tube was carried out subjected to axial load, pressure load and temperature load. Axial tensile stiffness offlame tube was calculated under ordinary condition.4. In multidisciplinary design optimization software Isight, analysis on the contribution of the initial designvariables on the objective function was carried out to obtain six final optimization design variables. Using theAMGA algorithm, the optimization design to minimize the deformation, minimize stress, and minimize thequality under different support arrangements were carried out. And the optimization design results were verified.5. Finite element modeling and analysis platform was established using MFC. Rapid modeling ofgeometric parameters could be adjusted, quick selection of boundary condition loading, finite element calculationand analysis of the results of output. And the optimization software could be called in the platform.The characteristics of deformation and stress under different support arrangements were compared. Andoptimization design was carried out respectively, which has significance in engineering applications. Theconclusion of this thesis is helpful to the research of supporting layout of annular flame tube.