Growth type topological optimization design method of reinforcing rib

Abstract

The invention discloses a growth type topological optimization design method of a reinforcing rib. The growth type topological optimization design method comprises the following steps: firstly, growing points need to be set for the reinforcing rib, then, the reinforcing rib grows outwards from each growing point, strain energy generated when the reinforcing rib grows to each direction can be solved, and the direction represented by the minimum strain energy is selected as a reinforcing rib growth direction; according to the method, one section of reinforcing rib grows each time, and an integral reinforcing rib layout can be obtained through continuous iteration; and a part which causes the strain energy of the structure to be obviously lowered in the integral reinforcing rib layout is kept, and is artificially rounded off so as to obtain a final reinforcing rib layout. When the method is used for designing, a designer does not need to own long-term design experiences and does not need to do repeated work of analog, improvement and secondary analog, the position of the reinforcing rib can not be constrained by fixed nodes, and meanwhile, a clear reinforcing rib layout result can be obtained.

Description

technical field [0001] The invention belongs to the technical field of reinforcement rib layout of panels and boxes, and in particular relates to a growing topology optimization design method of reinforcement ribs. technical background [0002] The layout of ribs plays a vital role in improving the stiffness of bearing parts. Therefore, experienced designers in industrial production often design the layout of ribs based on their own experience and the long-term unchanged production process in the workshop, and then use analysis software to design the layout of ribs. Carry out simulations to find out the unfavorable places in the structure, and add or cut reinforcing ribs according to experience; however, this kind of empirical design lacks theoretical basis and belongs to the method of treating headaches and feet, so it is extremely difficult to obtain the optimal layout design. It not only wastes materials and fails to achieve the goal, but also puts forward high requiremen...

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Problems solved by technology

[0002] The layout of ribs plays a vital role in improving the stiffness of bearing parts. Therefore, experienced designers in industrial production often design the layout of ribs based on their own experience and the long-term unchanged production process in the workshop, and then use analysis software to design the layout of ribs. Carry out simulations to find out the unfavorable places in the structure, and add or cut reinforcing ribs according to experience; however, this kind of empirical design lacks theoretical basis and belongs to the method of treating headaches and feet, so it is extremely difficult to obtain the optimal layout design. It not only wastes materials and fails to achieve the goal, but also puts forward high requirements on the designer's experience reserve and workload, which increases the labor cost of the enterprise; in addition, the results obtained by common topology optimization methods such as "variable density method" It is very vague and difficult to operate; while in other optimization layout methods of ribs, ribs can only be arranged between nodes, and cannot be separated from the constraints of nodes, so optimal results cannot be obtained

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