A method and system for section optimization of cable-strut tension structures based on robustness

Abstract

The invention discloses a method and system for optimizing the section of a cable-strut tension structure based on robustness. The method includes the following steps: (1) obtaining the structural initial parameter values ​​of various rods in the cable-strut tension structure to be optimized and Calculate the quality of the structure; (2) determine the search parameters; (3) use the global optimization algorithm to search for the cross-sectional area of ​​each type of bar that makes the structural robustness index minimum, and output it as an optimization result; Within the control range, the optimal layout of the bar section is sought to optimize the robustness of the cable-strut tension structure to ensure the load-bearing performance of the structure, thereby improving the ability of the structure to resist disproportionate damage and making the structure insensitive to disturbance. At the same time, it is ensured that the total mass of the optimized structure does not exceed the total mass of the initial structural model, so that the manufacturing cost can be reduced within a reasonable range under the premise of ensuring the safety of the structure.

Description

technical field [0001] The invention belongs to the field of civil engineering, and more particularly relates to a method and system for optimizing the section of a cable-strut tension structure based on robustness. Background technique [0002] The cable-strut tension structure is a kind of flexible space structure that is formed by tensioning and has a self-balancing prestressing system, which is composed of cables and compression rods as the basic units. Due to the high strength of the cables and the adjustment of the structural prestress distribution Then optimize the structure stiffness distribution, so that the structure has many advantages such as large span, light structure, beautiful shape, excellent economic performance, etc., and has been widely used in practical engineering. [0003] At present, there are relatively mature design methods for large-span structures in space. However, with the progress of society and economic development, it is inevitable to face pr...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method and system for optimizing the section of a cable-strut tension structure based on robustness. Seek the optimal layout within the control range, and at the same time ensure that the total mass of the optimized structure does not exceed the initial structural model, thereby solving the problem that the cross-section optimization of the cable-strut tension structure in the prior art is only based on the lightest structure weight and cannot comprehensively evaluate the structural bearing performance. question

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