The Study Of Determining The Main Load-Transfered Path Based On Structural Topology Optimization Design O Three-Dimensional Wing In Multi-Load Conditions

Main load-transfered path provides an important basis for selecting and arranging rationally the main load-bearing structure components of an aircraft, and it is very important in aircraft optimization design process. Topology optimization is an effective method to seek the main load-transfered path. This paper takes the model of an aircraft as the study object and focuses on the technology of confirming the main load-transfered path based on topology optimization design of three-dimensional wing. Main study work is as follows:1. Solid Isotropic Material With Penalization(SIMP) method and linear weighted sum method in multi-load conditions are investigated deeply, and topology optimization solution algorithm about optimization criterion based on SIMP is deduced.2. Three-dimensional wing model simplification and modeling is studied. In order to achieve assembly, the modeling approach of core-board gluing skin is put forward to the special structure of wing box. In order to obtain better mesh shape in contact surfaces of core-board and skin, the method of first assembly connection and then meshing is taken.3. This paper focuses on the topology optimization design of three-dimensional wing box based on ANSYS in single-load condition and multi-load conditions. The study content is based on the conceptual design of the three-dimensional wing box. The topology optimization of the wing box in single-load condition and multi-load conditions is studied respectively, and the main load-transfered path is found out. Optimization results show the methods feasible and effective.This paper finds out the main load-transfered path of the wing structure,and discovers a new approach different from the experience design to determine the optimal form of the wing structure in conceptual design phase.