Discrete variable truss non-probability reliability optimization design method

A discrete variable, optimal design technology, applied in the field of truss optimization, can solve problems such as inability to use directly

Active Publication Date: 2017-05-31
陕西蜗牛登顶电子科技有限公司
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Problems solved by technology

However, the existing non-probabilistic reliability design methods for trusses are mainly aimed at continuous variables. In truss design, due to the requirements of manufacturing standardization and industrial design specifications, parameters such as truss member dimensions can only take a few discrete values. , leading to the fact that the existing truss reliability design methods cannot be used directly

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  • Discrete variable truss non-probability reliability optimization design method
  • Discrete variable truss non-probability reliability optimization design method
  • Discrete variable truss non-probability reliability optimization design method

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Embodiment Construction

[0092] like figure 1 A discrete variable truss non-probabilistic reliability optimization design method shown includes the following steps:

[0093] Step 1. Determine the design variables of the truss to be optimized and set the initial parameters: the truss to be optimized is a planar truss composed of multiple straight bars, each straight bar is called a bar, and the connection between each straight bar is called a node , the straight bar between two nodes is called a bar element, the number of bars and bar elements in the truss to be optimized is k, the number of nodes in the truss to be optimized is h, and the nodes include fixed nodes and Free nodes, the center of the truss to be optimized is the coordinate origin to establish a plane Cartesian coordinate system, the horizontal direction is the X axis, and the vertical direction is the Y axis;

[0094] In actual use, the fixed nodes only bear tension and pressure, and no displacement changes occur, that is, the X displac...

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Abstract

The invention discloses a discrete variable truss non-probability reliability optimization design method. The method includes the steps that firstly, a design variable and related design parameters of a truss needing optimization design are determined; secondly, the to-be-optimized truss is subjected to optimization processing by means of a pre-built discrete variable truss non-probability reliability optimization model. The method is simple in step, reasonable in design and good in use effect, an uncertain parameter vector influencing the reliability of the truss is taken into consideration, a displacement non-probability reliability indicator function and a stress non-probability reliability indicator function are built, structural optimization of truss discrete variable non-probability reliability is achieved, the weight of the truss is reduced, and it is guaranteed that the optimal design scheme of the truss is obtained.

Description

technical field [0001] The invention belongs to the technical field of truss optimization, and in particular relates to a non-probabilistic reliability optimization design method of a discrete variable truss. Background technique [0002] The truss is composed of straight rods and generally has a plane or space structure of triangular units. The rods in the truss mainly bear axial tension or pressure, so that the strength of the material can be fully utilized. When the span is large, it can save materials and reduce its own weight compared with solid web beams. and increased stiffness. The intersection points of members and members are regarded as nodes, and the members between every two nodes are regarded as a bar element. Trusses are widely used in fields such as aviation, construction, civil engineering, electricity and machinery. In actual engineering, due to factors such as manufacturing environment, technical conditions, multi-phase characteristics of materials, inst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/17
Inventor 乔心州
Owner 陕西蜗牛登顶电子科技有限公司
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