Steel truss structure damage identification method based on hybrid meta-heuristic algorithm

A meta-heuristic algorithm, a technology of structural damage, applied in the field of structural damage identification, can solve the problems of noise sensitivity, practical application of influence methods, inability to accurately identify multiple damages, etc., to achieve high accuracy, maintain individual diversity, and speed up convergence. Effect

Pending Publication Date: 2020-03-17
BEIJING UNIV OF TECH
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Problems solved by technology

The damage identification of steel trusses using the butterfly optimization algorithm and the differential evolution algorithm alone has the problems of being unable to accurately identify multiple damages and being sensitive to noise, which affects the practical application of the method

Method used

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  • Steel truss structure damage identification method based on hybrid meta-heuristic algorithm
  • Steel truss structure damage identification method based on hybrid meta-heuristic algorithm
  • Steel truss structure damage identification method based on hybrid meta-heuristic algorithm

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Embodiment Construction

[0048] The present invention will be further elaborated below in conjunction with the flow charts and test examples in the description of the accompanying drawings.

[0049] Such as figure 1 with figure 2 As shown, the damage identification problem of steel truss structures can be transformed into an optimization problem, using the hybrid butterfly optimization and differential evolution meta-heuristic algorithm (Hybrid Butterfly Optimization and Differential Evolution

[0050] Algorithms) to solve.

[0051] The specific implementation of the damage identification of the steel truss structure includes the following steps:

[0052] Step 1: Divide the steel truss into M units, install L accelerometers on different nodes, and use the accelerometers to measure the response A of the structure under the external load force mea ;

[0053] Step 2: The parameters of the hybrid algorithm are initialized, and the structural parameters are randomly generated in the search domain. Ass...

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Abstract

The invention discloses a steel truss structure damage identification method based on a hybrid meta-heuristic algorithm, and belongs to the application of an element heuristic algorithm in the engineering field of steel truss damage identification, and mainly comprises the following four steps of: establishing a finite element model of a steel truss damage structure, and obtaining the accelerationof the structure under the action of an external load; calculating acceleration by using a hybrid algorithm; constructing a target function of the steel truss structure; and continuously optimizing the target function until a termination condition is met, and outputting an optimal solution. According to the steel truss structure damage identification method, the advantages of the two algorithms are integrated, and the balance of global search and local search is considered, so that the hybrid algorithm has very good accuracy and robustness; according to the algorithm, the existence of damage,the position of the damage and the degree of the damage can be identified by adopting self-adaptive variation, and crossover operators and dynamic parameters which are changed along with the number of iterations; and the steel truss structure damage identification method can still accurately identify multiple damages of the steel truss structure in a noisy environment.

Description

technical field [0001] The invention relates to the technical field of structural damage identification, in particular to a method for identifying damage to steel truss structures based on a hybrid element heuristic algorithm. Background technique [0002] With the advancement of science and technology, the application of a large number of new materials, new equipment and new technologies has made the engineering structure develop in the direction of large-scale and complex. Landmark buildings such as Shanghai Financial Center, Beijing China Zun and Shenzhen Ping An Financial Center show that Great strides have been made in the field of civil engineering. Since the service life of engineering structures is as long as several decades, the structures are vulnerable to coupling effects of unfavorable factors such as material aging, overloading, environmental erosion, and fatigue damage during the service period, which will cause the reduction of structural bearing capacity and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06N3/00
CPCG06N3/006
Inventor 周宏元张广才王小娟倪萍禾
Owner BEIJING UNIV OF TECH
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