Design method for multi-steady-state deformable switch structure

Abstract

The invention discloses a design method for a multi-steady-state deformable switch structure. The method comprises the following steps: (1) determining the plane shape of a composite material laminated plate according to an actual application environment; (2) determining the change of values of rectangular section area second moment of the laminated plate along the length direction according to the requirements of designed steady state values and the total length of the laminated plate; (3) inversely calculating the data of thicknesses of all the places of the laminated plate according to the values of the rectangular section area second moment and the determined width data; (4) equivalently discretizing the thickness data obtained from the step (3) considering the situation that the thickness of the single-layer fiber woven prepreg is set and cannot continuously change; (5) cutting the prepreg according to the obtained dimension data of the laminated plate, paving up according to the preset thickness and carrying out curing forming according to autoclave technology; and (6) performing displacement constraint on the stiffness-variable laminated plate with the aid of an auxiliary structure to finish the fabrication of the entire switch structure. The multi-steady-state deformable switch structure adopting the design method is light in weight, can achieve large deformation, and has enough stiffness to resist outside loads under steady state without additional support.

Description

technical field [0001] The invention belongs to the field of aviation technology and relates to a design method of a multi-stable deformable switch structure that can be used for fluid flow control. Background technique [0002] In recent years, with the development of aviation technology, deformable structures are receiving more and more attention due to their superior performance. Deformable structures are able to adapt to different external conditions by changing their shape, most commonly such as deformable wings. The rise of deformable structures puts forward more stringent requirements on the structure itself: (1) the structure needs to be able to produce large deformation under certain conditions; (2) it can resist external loads without providing support in a stable state; (3) the structure The overall quality should be light. [0003] The current conventional deformable structures usually use more complex drive systems in their own structural systems, such as hydr...

AI Technical Summary

Problems solved by technology

These driving methods usually require continuous energy input to maintain the deformation of the structure, so it is necessary to implant certain loading equipment, control equipment, and load maintenance equipment in the deformation system, which will inevitably greatly increase the weight of the structure. Extremely unfavorable for use in spaceflight

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