CN-121980838-A - Method and device for optimizing reinforcement arrangement of plate shell structure

CN121980838ACN 121980838 ACN121980838 ACN 121980838ACN-121980838-A

Abstract

The application provides a plate shell structure reinforcement arrangement optimization method and device, the method comprises the steps of arranging reinforcement structures on plate shell structures to construct a plate shell structure finite element model with reinforcement structures, carrying out finite element mesh division on the finite element model, applying constraint and load to the finite element model according to actual stress conditions of the plate shell structures, carrying out static calculation to obtain displacement response, determining deformation indexes, setting section parameters of each beam unit as products of initial values and discrete variables, taking the discrete variables of all the beam units as optimization variables, carrying out optimization calculation by taking the minimum integral weight of the structure as an optimization objective function on the premise that rigidity meets the deformation indexes to obtain the discrete variables of all the beam units, judging the discrete variables, retaining the corresponding reinforcement structures if the discrete variables meet requirements, and deleting the corresponding reinforcement structures if the discrete variables do not meet the requirements, so that an optimal arrangement scheme of the plate shell structure reinforcement is obtained.

Inventors

ZHENG QI
LIU YANJIE
SUN RENJUN
YIN LI
LI MINGQIANG

Assignees

中国航空工业集团公司西安飞机设计研究所

Dates

Publication Date: 20260505
Application Date: 20251127

Claims (12)

1. The method for optimizing the reinforcement arrangement of the plate shell structure is characterized by comprising the following steps of: Arranging a reinforcement structure on the plate shell structure so as to construct a plate shell structure finite element model with the reinforcement structure, and carrying out finite element mesh division on the plate shell structure finite element model with the reinforcement structure, wherein the plate shell or the skin is represented by a shell unit, the reinforcement structure is represented by a beam unit, and each continuous ring frame or longitudinal rib is endowed with the same section parameter; according to the actual stress condition of the plate shell structure, constraint and load are applied to the plate shell structure finite element model with the reinforced structure, static force calculation is carried out, the displacement response of the plate shell structure is obtained, and deformation indexes are determined; Setting the cross-sectional parameter of each beam unit to be the product of an initial value and a discrete variable t i , i representing the number of the reinforced structure, wherein t i = 1 or t i = epsilon, epsilon being a positive value much smaller than 1; Taking the discrete variables t i of all beam units as optimization variables, and carrying out optimization calculation by taking the minimum weight of the whole structure as an optimization objective function on the premise that the rigidity of the whole structure meets the deformation index until the optimization result converges to obtain the discrete variables t i of all beam units; And judging the discrete variable t i , if the discrete variable t i =1, reserving a corresponding reinforcement structure, and if the discrete variable t i =epsilon, deleting the corresponding reinforcement structure, so as to obtain an optimal arrangement scheme of the reinforcement of the plate-shell structure.
2. The method for optimizing the reinforcement arrangement of the plate and shell structures according to claim 1, wherein the reinforcement structure comprises a ring frame which is arranged along the circumferential direction of the plate and shell structures and longitudinal ribs which are arranged along the bus direction of the plate and shell structures, and the density of the reinforcement structure is arranged according to the upper design limit when the reinforcement structure is initially arranged.
3. The method for optimizing the reinforcement arrangement of a plate and shell structure according to claim 1, wherein the deformation index is not more than a maximum displacement.
4. The method of optimizing the reinforcement arrangement of a panel-like structure of claim 1, wherein the positive value substantially less than 1 is no more than one percent of 1.
5. The method for optimizing the reinforcement arrangement of the plate and shell structures according to claim 1, wherein the optimization algorithm adopted in the optimization calculation comprises an approximate random annealing algorithm and a NPLA gradient algorithm.
6. The utility model provides a stiffening arrangement optimizing apparatus of plate shell class structure which characterized in that includes: The model construction module is used for arranging a reinforcement structure on the plate shell structure so as to construct a plate shell structure finite element model with the reinforcement structure, and carrying out finite element mesh division on the plate shell structure finite element model with the reinforcement structure, wherein the plate shell or the skin is represented by a shell unit, the reinforcement structure is represented by a beam unit, and each continuous ring frame or longitudinal rib is endowed with the same section parameter; The constraint construction module is used for applying constraint and load to the finite element model of the plate shell structure with the reinforced structure according to the actual stress condition of the plate shell structure, performing static calculation, obtaining the displacement response of the plate shell structure, and determining the deformation index; A parameter construction module for setting the cross-sectional parameter of each beam unit to the product of an initial value and a discrete variable t i , i representing the number of the reinforced structure, wherein t i =1 or t i =ε, ε being a positive value much smaller than 1; The optimization calculation module is used for carrying out optimization calculation by taking the discrete variables t i of all the beam units as optimization variables and taking the minimum weight of the whole structure as an optimization objective function on the premise that the whole structure rigidity meets the deformation index until the optimization result converges to obtain the discrete variables t i of all the beam units; The arrangement module is used for judging the discrete variable t i , if the discrete variable t i =1, reserving a corresponding reinforcement structure, and if the discrete variable t i =epsilon, deleting the corresponding reinforcement structure, so that an optimal arrangement scheme of the reinforcement of the plate-shell structure is obtained.
7. The reinforcing arrangement optimizing device for the plate and shell type structures according to claim 6, wherein the reinforcing structure comprises a ring frame which is arranged along the circumferential direction of the plate and shell type structures and longitudinal ribs which are arranged along the bus direction of the plate and shell type structures, and when the reinforcing structure is initially arranged, the density of the reinforcing structure is arranged according to the upper design limit.
8. The panel-shell structure reinforcement arrangement optimizing apparatus of claim 6, wherein the deformation index is not more than a maximum displacement.
9. The panel-shell structure reinforcement arrangement optimizing apparatus of claim 6, wherein the positive value much smaller than 1 means no more than one percent of 1.
10. The plate and shell structure reinforcement arrangement optimizing device according to claim 6, wherein the optimizing algorithm adopted in the optimizing calculation comprises an approximate random annealing algorithm and a NPLA gradient algorithm.
11. An electronic device, comprising: One or more processors; A memory; One or more applications stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to implement the panel shell structure reinforcement arrangement optimization method of any one of claims 1-5.
12. A computer-readable storage medium storing at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by a processor to implement the panel shell structure reinforcement arrangement optimization method of any one of claims 1-5.

Description

Method and device for optimizing reinforcement arrangement of plate shell structure Technical Field The application belongs to the technical field of aircraft structural design, and particularly relates to a plate shell structure reinforcement arrangement optimization method and device. Background The plate shell structure is widely applied to the fields of aviation, aerospace, automobiles, ships and the like. Because the rigidity, strength, buckling, vibration and other mechanical properties of the plate-shell structure are poor, the plate-shell structure generally adopts a reinforced structural form in practical application. When the plate-shell structure is subjected to uneven load or concentrated load, the equidistant reinforcement arrangement method is difficult to meet the requirements of structural strength and weight indexes at the same time, and the topology optimization method is time-consuming and labor-consuming in engineering and is difficult to realize. Therefore, how to realize the optimal design of the reinforcement arrangement in the plate-shell structure and improve the bearing capacity of the structure is a challenging task of the lightweight design of the structure. Disclosure of Invention The application aims to provide a method and a device for optimizing reinforcement arrangement of a plate-shell structure, which are used for solving or relieving at least one problem in the background art. On one hand, the technical scheme of the application is that the method for optimizing the reinforcement arrangement of the plate-shell structure comprises the following steps: Arranging a reinforcement structure on the plate shell structure so as to construct a plate shell structure finite element model with the reinforcement structure, and carrying out finite element mesh division on the plate shell structure finite element model with the reinforcement structure, wherein the plate shell or the skin is represented by a shell unit, the reinforcement structure is represented by a beam unit, and each continuous ring frame or longitudinal rib is endowed with the same section parameter; according to the actual stress condition of the plate shell structure, constraint and load are applied to the plate shell structure finite element model with the reinforced structure, static force calculation is carried out, the displacement response of the plate shell structure is obtained, and deformation indexes are determined; Setting the cross-sectional parameter of each beam unit to be the product of an initial value and a discrete variable t i, i representing the number of the reinforced structure, wherein t i = 1 or t i = epsilon, epsilon being a positive value much smaller than 1; Taking the discrete variables t i of all beam units as optimization variables, and carrying out optimization calculation by taking the minimum weight of the whole structure as an optimization objective function on the premise that the rigidity of the whole structure meets the deformation index until the optimization result converges to obtain the discrete variables t i of all beam units; And judging the discrete variable t i, if the discrete variable t i =1, reserving a corresponding reinforcement structure, and if the discrete variable t i =epsilon, deleting the corresponding reinforcement structure, so as to obtain an optimal arrangement scheme of the reinforcement of the plate-shell structure. Preferably, the reinforcement structure comprises a ring frame which is arranged along the circumferential direction of the plate shell structure and longitudinal ribs which are arranged along the bus direction of the plate shell structure, and when the reinforcement structure is initially arranged, the density of the reinforcement structure is arranged according to the upper design limit. Preferably, the deformation index is not more than a maximum displacement. Preferably, the positive value much smaller than 1 means no more than one percent of 1. Preferably, the optimization algorithm used in the optimization calculation includes an approximate random annealing algorithm and a NPLA gradient algorithm. On the other hand, the technical scheme provided by the application is that the plate shell structure reinforcement arrangement optimizing device comprises: The model construction module is used for arranging a reinforcement structure on the plate shell structure so as to construct a plate shell structure finite element model with the reinforcement structure, and carrying out finite element mesh division on the plate shell structure finite element model with the reinforcement structure, wherein the plate shell or the skin is represented by a shell unit, the reinforcement structure is represented by a beam unit, and each continuous ring frame or longitudinal rib is endowed with the same section parameter; The constraint construction module is used for applying constraint and load to the finite element model of the plate shell structure with the