Planar structure design method
A design method and technology of planar structure, applied in computing, special data processing applications, instruments, etc.
Pending Publication Date: 2019-11-29
UNIV OF SHANGHAI FOR SCI & TECH
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[0003] The present invention aims at the problems existing in the current optimization design, and proposes a planar structure design method, which is more concise and reasonable in geometric analysis and optimization, and solves the continuity problem in the current slicing method
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[0025] Such as figure 1 The flow chart of the design method of the planar structure is shown, and the specific steps are as follows:
[0026] Step S1: Observe the model to be designed, decompose the model, and decompose the model into a single piece that can be expressed normally, such as figure 2 The model diagram that needs to be designed is shown, such as image 3 The slice diagram of the model shown, and then input the initial control points of the single piece through the stress distribution that needs to be considered to generate the initial model of the single piece, and then use the program to number the control points of the single piece one by one, and splice the two adjacent pieces into For one piece, in the two pieces that have been spliced, insert continuity control points, and then achieve c1 continuity by changing the node vectors of the boundary and internal curves. C1 continuity means that the nurbs basis function inside the model can be derived twice, show...
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The invention relates to a planar structure design method, which comprises the following steps of: inputting initial control points to generate a plurality of initial models, splicing the initial models into one piece, and improving the continuity of the models; analyzing the rigidity matrix and the displacement of the initial model through an analysis module, and calculating the value of a designvariable; importing the initial control point into an optimization module, and solving a result of the target function; judging whether the result of the target function is an optimal design variablevalue, and solving the result of the target function; performing refinement processing on the model to obtain an optimal display control point; and carrying out stress cloud chart display on the optimal control point. The continuity problem of fragmentation splicing is solved in modeling, so that the model is in smooth transition no matter displacement or stress change; solving an equivalent stress and a derivative of the equivalent stress to a design variable in optimization; a sensitivity method is used as a bridge, and the derivative of equivalent stress to a design variable and the displacement of a control point are connected together. And geometric analysis optimization is simpler and more reasonable.
Description
technical field [0001] The invention relates to a structure design technology, in particular to a planar structure design method. Background technique [0002] Mechanical design is the most important link in the mechanical industry, which is to design the best machinery under various limited conditions (such as materials, processing, theoretical knowledge and calculation means, etc.), that is, to make an optimal design. In the past, design optimization mainly relied on the designer's knowledge, experience and foresight. With the development of mechanical engineering theory and the application of computer design software, mechanical design is more efficient and accurate. Later, the development of geometric theory made the optimization of mechanical design easier. The advantage of isogeometric analysis is that it can easily express a complex and difficult-to-express model. There are two popular isogeometric analysis modeling methods: clipping method and slice method. The d...
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IPC IPC(8): G06F17/50
Inventor 陈龙徐力王恺
Owner UNIV OF SHANGHAI FOR SCI & TECH