Optimal design method and equipment for composite structure based on vector field
A composite material, optimization design technology, applied in design optimization/simulation, instrumentation, geometric CAD, etc., to achieve the effect of ensuring manufacturability, improving structural mechanical properties, and maximizing stiffness
Active Publication Date: 2022-03-18
HUAZHONG UNIV OF SCI & TECH
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However, for complex problems, the analytical form of the feasible region of layer parameters is still an open problem
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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0042] see figure 1 Flow chart, in this embodiment, the vector field-based composite material structure optimization design method, it includes the following steps:
[0043] (1) Set a series of discrete design points P in the design domain D of the composite material structure i , for each design point P i Assign weight coefficient α i , and divide the design domain D into N units, and defin...
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The invention discloses a composite material structure optimization design method and equipment based on a vector field, belonging to the field of composite material structure design. The method includes: setting a series of discrete design points in the structural design domain and defining the weight coefficients of the design points, dividing the design domain into several units, and defining the vector at the center point of each unit; calculating according to the design point coordinates and the unit center point coordinates Linear independent vector field, combined with the design point weight coefficient to calculate the element center point vector and element center point fiber angle; define the design variables, design objectives and design constraints in the optimization design problem of composite material structure; perform finite element analysis and establish the stiffness matrix of each element and the overall stiffness matrix to solve the displacement field; calculate the sensitivity of the objective function to the design variables; update the design variables, and repeat the above steps until the optimization termination condition is satisfied. The invention can ensure the spatial continuity of fiber angles, reduce design variables and improve optimization efficiency.
Description
technical field [0001] The invention belongs to the field of composite material structure design, and more specifically relates to a vector field-based composite material structure optimization design method and equipment. Background technique [0002] Composite materials have higher specific strength and specific modulus than traditional materials, and have the advantages of strong design, good corrosion resistance, good fatigue fracture resistance, and good seismic performance. It is widely used in weapons and equipment, building structures, aerospace and other fields. Fiber-reinforced composite structures have good designability. By changing the material type, fiber laying direction, fiber volume content, structural topology, laying direction and sequence, the requirements for material stiffness, strength, elasticity and directionality in structural design can be met. Designers can design the composition and combination of fiber reinforced composites according to their ...
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IPC IPC(8): G06F30/17G06F30/23G06F119/14
Inventor 夏奇田野蒲史鸣史铁林
Owner HUAZHONG UNIV OF SCI & TECH