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A Structural Topology Optimization Method Considering the Uncertainty of External Load Direction

A technology of topology optimization and uncertainty, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as difficult calculations and absolute value functions, and achieve high optimization efficiency, low design efficiency, and computational complexity little effect

Active Publication Date: 2022-05-27
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, the objective function established by this method involves the derivation of the absolute value function when calculating the first derivative, which is difficult to calculate

Method used

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  • A Structural Topology Optimization Method Considering the Uncertainty of External Load Direction
  • A Structural Topology Optimization Method Considering the Uncertainty of External Load Direction
  • A Structural Topology Optimization Method Considering the Uncertainty of External Load Direction

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Embodiment Construction

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, and the present invention includes but is not limited to the following embodiments.

[0019] In the process of actual engineering structure design, the influence of disturbances such as the magnitude, direction and action position of the external load on the design of the force transmission path of the structure is fully considered, and the resistance of the structural performance to the uncertainty factors of external loads is improved, so that it can withstand the complex stress environment. It is a problem that must be considered in the structural optimization design to be able to perform the expected function normally and stably. The invention provides a structure topology optimization method which can consider the uncertainty of the direction of the external load, optimizes the topology configuration of the structure based on the absolute value of the m...

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Abstract

The invention provides a structural topology optimization method considering the uncertainty of the external load direction. Through the first-order derivative analysis of the objective function of the optimal design, the first-order sensitivity of the objective function to the topology design variables is expressed as an explicit expression of the direction angle of the external load; The order derivative sensitivity value as a representative indicator for random changes in the load direction. In the iterative process of updating design variables, the variable design and modification are carried out based on the sensitivity value with the largest absolute value, and the uncertainty of the load direction is integrated into the topology optimization process of the structure. The optimized design results can significantly improve the structural performance and external load. The resistance to direction changes is an efficient and reliable method to realize the robust topology optimization design of continuum structures with uncertain external load directions.

Description

technical field [0001] The invention belongs to the technical field of optimization design of continuum structures, and particularly relates to a structure topology optimization method considering the uncertainty of the direction of external loads. Background technique [0002] The topology optimization design of the structure is to find the best material distribution (that is, the force transmission path) in the given design area, so that the performance of the structure can be optimized under the given constraints and other conditions. In the traditional topology optimization design problem, the physical properties, constraints and loading environment of materials are generally determined and unchanged. However, in the application of practical engineering structures, uncertain factors are ubiquitous and unavoidable. These uncertain factors will undoubtedly have a great impact on the material configuration and force transmission path of the structure, and will ultimately a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/14
Inventor 王栋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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