Structured mesh generation method for finite element analysis for threaded pipe internal channel finite element analysis
A structured grid and internal channel technology, applied in design optimization/simulation, image data processing, instrumentation, etc., to achieve good analysis accuracy and fidelity, reduce the number of grids, and ensure the effect of calculation quality
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Embodiment 1
[0084] refer to figure 2 , when the threaded tooth type is a triangular tooth, and N=12, the following steps are used to mesh the two-dimensional flow section of the threaded pipe:
[0085] Step 1.1.1: Establish the periodic unit topology of the two-dimensional flow section, including the fan-shaped structure that divides the inner circle structure of the threaded pipe into 12 equal parts and the quadrilateral structure that represents the tooth shape. The fan-shaped structure corresponds to a central angle of 30 degrees;
[0086] Step 1.1.2: Divide the fan-shaped structure and the quadrilateral structure into triangular blocks and quadrilateral blocks respectively in ICEM CFD software;
[0087] Step 1.1.3: Divide the triangular block into Y-Block;
[0088] Step 1.1.4: Perform point association and line association, and set the corresponding number of nodes to generate a two-dimensional periodic cell grid;
[0089] Step 1.1.5: Convert the two-dimensional periodic cell grid ...
Embodiment 2
[0094] refer to image 3 , when the thread tooth type is a triangular tooth, and N=20, the following steps are used to mesh the two-dimensional flow section of the threaded pipe:
[0095] Step 1.2.1: Establish a part-periodic unit topology of the two-dimensional flow section, corresponding to a central angle of 18 degrees, including a quadrilateral structure that divides the inner circular structure of the threaded tube into N equal parts and a quadrilateral structure that represents the tooth shape ;
[0096] Step 1.2.2: divide the two quadrilateral structures into quadrilateral blocks in ICEM CFD software;
[0097] Step 1.2.3: Perform point association and line association, and set the corresponding number of nodes to generate a two-dimensional periodic cell grid;
[0098] Step 1.2.4: Convert the two-dimensional periodic cell grid into an unstructured type grid;
[0099] Step 1.2.5: Use the Geometry→Transform Geometry→RotateGeometry function in ICEM CFD software to rotate...
Embodiment 3
[0108] refer to Figure 7 , when the threaded tooth profile is trapezoidal and N=40, the following steps are used to divide the two-dimensional flow section of the threaded pipe into a mesh:
[0109] Step 1.3.1: Establish the partial periodic unit topology of the two-dimensional flow section, which includes a circle representing the inner circular channel of the threaded pipe and a quadrilateral structure representing the tooth shape;
[0110] Step 1.3.2: In the ICEM CFD software, perform O-Block division of the internal circular structure and delete redundant blocks by cutting into blocks, and perform point association and line association;
[0111] Step 1.3.3: Use the Geometry→Transform Geometry→RotateGeometry function in ICEM CFD software to rotate and copy the two-dimensional quadrilateral periodic unit structure, the number of copies is 39, and the rotation angle is 9 degrees;
[0112] Step 1.3.4: Adjust the four nodes of the O-block to a suitable position;
[0113] Ste...
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