Rapid collaborative optimization method for hybrid fiber composite material plate shell structure

Abstract

The invention relates to a rapid collaborative optimization method for a hybrid fiber composite material plate shell structure, which belongs to the technical field of composite material structure optimization design, and comprises the following steps of: 1) establishing an alternative material library; 2) establishing a three-dimensional finite element numerical model and performing geometric partitioning; 3) establishing a reduced-order numerical analysis model by using a model reduced-order method; and 4) establishing an optimized column, and carrying out discrete material optimization design. A continuous interpolation function is adopted to represent a discrete material in a material library, numerical calculation is carried out by adopting a reduced-order model to obtain a target anda constraint response according to geometric partitions, an optimization target and a constraint distribution design variable of a model, discrete material optimization design is carried out, multi-variable collaborative optimization is realized, and an optimal design configuration is obtained. Integrated design of the hybrid fiber composite material structure can be achieved, collaborative optimization design of multi-level variables such as the structure topology, the fiber content, the fiber angle and the laying sequence is achieved, the structural function requirement is met, meanwhile, the structural mass is reduced, and the material cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite material structure optimization design, and relates to a fast collaborative optimization method for hybrid fiber composite material plate and shell structures. Background technique [0002] Fiber-reinforced composite materials are composite materials formed by reinforcing fiber materials, such as glass fiber, carbon fiber, aramid fiber, etc., and matrix materials through winding, molding or pultrusion. Because fiber reinforced composite materials have the following characteristics: (1) high specific strength and large specific modulus; (2) material properties can be designed; (3) good corrosion resistance and durability; (4) thermal expansion coefficient and concrete similar. These characteristics make fiber-reinforced composite materials meet the needs of modern structures with large spans, high towers, heavy loads, light weight and high strength, and work under harsh conditions. Widely used ...

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Problems solved by technology

[0004] This invention mainly solves the problem that hybrid fiber composite material structure is difficult to carry out cross-scale design variable collaborative optimization, and solves the problem of low efficiency in large-scale structural calculation optimization in engineering, and proposes a A Fast Collaborative Optimization Method for Hybrid Fiber Composite Panel and Shell Structures

Combined with geometric partitioning and model reduction technology to improve numerical analysis and optimization efficiency, and solve the problem of low efficiency in large-scale structural optimization

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