A modeling method of hollow blade with truss-type inner cavity stiffener structure

Abstract

The present invention proposes a hollow blade modeling method with a truss-type inner cavity stiffener structure. By constructing a 3D model of the outer shape and inner shape of the blade body, and then constructing a smooth stiffener entity within the hollow range of the inner shape blade body, and finally The Boolean difference operation obtains the final hollow blade. This method solves the problem of large calculation errors in the position and shape of the stiffener truss in the existing truss-type hollow blade design, complicated and cumbersome calculations, the inability to ensure the smooth transition of the stiffener from the top section to the bottom section, and the two ends of the leading edge and trailing edge to the stiffener truss. Smooth transition and other issues, by using this method, a more accurate layout of the stiffener truss can be obtained under low computer hardware conditions. Moreover, the method has no limitation on the platform of the three-dimensional software, and the method can be used to design the truss-type hollow blade on various software platforms.

Description

technical field [0001] The invention relates to the technical field of blade design, in particular to a modeling method for a hollow blade with a truss-type inner cavity stiffener structure. Background technique [0002] Truss-type hollow blades are mainly used for wide-chord hollow blades, which have the advantages of increasing compressor surge margin, resisting foreign object damage, increasing engine thrust, reducing the number of blades and reducing weight. In the structural design of the hollow blade, the structural form and size of the inner cavity and the layout of the inner reinforced core plate have an important influence on the structural performance of the hollow blade. The design process of the truss-type hollow blade is very complicated. The ribs are located in the hollow area of ​​the blade body. The upper end, the bottom end, the leading edge, and the trailing edge must be integrated with the blade body. The surface changes lead to complex calculation deriva...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large calculation errors in the position and shape of the rib truss in the existing truss-type hollow blade design, the calculation is complicated and cumbersome, and the smooth transition of the rib from the top section to the bottom section, and the smooth transition from both ends of the leading edge and trailing edge to the rib truss cannot be guaranteed. and other problems, the present invention proposes a hollow blade modeling method with a truss-type inner cavity stiffener structure, which constructs a 3D model of the outer shape and inner shape of the blade airfoil, and then constructs a smooth Rib entity, and the final Boolean difference operation to obtain the final hollow blade

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