ABAQUS不支持金字塔单元？C3D5和C3D13？？

lili0719

请教：：：我有个模型，由于结构比较复杂，全部采用结构化网格划分的话，是不太可能做到的。因此，我在hypermesh里划分网格的时候，部分区域采用了金字塔形状的5面体单元。然后，在选择单元类型的时候，找不到能与之匹配的单元类型。因为：如果采用二阶的单元的话，就应该有13个节点，那么单元类型应该是C3D13，然而，在hyepermesh里面找不到C3D13这种单元，或者一阶的C3D5单元。ABAQUS不支持这种单元么？？？

Robert_Su

1# lili0719

hypermesh可以劃五面體單元??
我怎麼不知道.
應該是四面體單元吧.

Lxcad

ABAQUS有五面体单元

rocksoul

C3D4 4-node linear tetrahedron   (Section 22.1.4)

C3D4E 4-node linear piezoelectric tetrahedron   (Section 22.1.4)

C3D4H 4-node linear tetrahedron, hybrid, linear pressure   (Section 22.1.4)

C3D4T 4-node thermally coupled tetrahedron, linear displacement and temperature   (Section 22.1.4)

C3D6 6-node linear triangular prism   (Section 22.1.4)

C3D6E 6-node linear piezoelectric triangular prism   (Section 22.1.4)

C3D6H 6-node linear triangular prism, hybrid, constant pressure   (Section 22.1.4)

C3D6T 6-node thermally coupled triangular prism, linear displacement and temperature   (Section 22.1.4)

C3D8 8-node linear brick   (Section 22.1.4)

C3D8E 8-node linear piezoelectric brick   (Section 22.1.4)

C3D8H 8-node linear brick, hybrid, constant pressure   (Section 22.1.4)

C3D8HT 8-node thermally coupled brick, trilinear displacement and temperature, hybrid, constant pressure   (Section 22.1.4)

C3D8I 8-node linear brick, incompatible modes   (Section 22.1.4)

C3D8IH 8-node linear brick, hybrid, linear pressure, incompatible modes   (Section 22.1.4)

C3D8P 8-node brick, trilinear displacement, trilinear pore pressure   (Section 22.1.4)

C3D8PH 8-node brick, trilinear displacement, trilinear pore pressure, hybrid, constant pressure   (Section 22.1.4)

C3D8R 8-node linear brick, reduced integration, hourglass control   (Section 22.1.4)

C3D8RH 8-node linear brick, hybrid, constant pressure, reduced integration, hourglass control   (Section 22.1.4)

C3D8RHT 8-node thermally coupled brick, trilinear displacement and temperature, reduced integration, hourglass control, hybrid, constant pressure   (Section 22.1.4)

C3D8RP 8-node brick, trilinear displacement, trilinear pore pressure, reduced integration   (Section 22.1.4)

C3D8RPH 8-node brick, trilinear displacement, trilinear pore pressure, reduced integration, hybrid, constant pressure   (Section 22.1.4)

C3D8RT 8-node thermally coupled brick, trilinear displacement and temperature, reduced integration, hourglass control   (Section 22.1.4)

C3D8T 8-node thermally coupled brick, trilinear displacement and temperature   (Section 22.1.4)

C3D10 10-node quadratic tetrahedron   (Section 22.1.4)

C3D10E 10-node quadratic piezoelectric tetrahedron   (Section 22.1.4)

C3D10H 10-node quadratic tetrahedron, hybrid, constant pressure   (Section 22.1.4)

C3D10M 10-node modified tetrahedron, hourglass control   (Section 22.1.4)

C3D10MH 10-node modified quadratic tetrahedron, hybrid, linear pressure, hourglass control   (Section 22.1.4)

C3D10MHT 10-node thermally coupled modified quadratic tetrahedron, hybrid, linear pressure, hourglass control   (Section 22.1.4)

C3D10MP 10-node modified displacement and pore pressure tetrahedron, hourglass control   (Section 22.1.4)

C3D10MPH 10-node modified displacement and pore pressure tetrahedron, hybrid, linear pressure, hourglass control   (Section 22.1.4)

C3D10MT 10-node thermally coupled modified quadratic tetrahedron, hourglass control   (Section 22.1.4)

C3D15 15-node quadratic triangular prism   (Section 22.1.4)

C3D15E 15-node quadratic piezoelectric triangular prism   (Section 22.1.4)

C3D15H 15-node quadratic triangular prism, hybrid, linear pressure   (Section 22.1.4)

C3D15V 15 to 18-node triangular prism   (Section 22.1.4)

C3D15VH 15 to 18-node triangular prism, hybrid, linear pressure   (Section 22.1.4)

C3D20 20-node quadratic brick   (Section 22.1.4)

C3D20E 20-node quadratic piezoelectric brick   (Section 22.1.4)

C3D20H 20-node quadratic brick, hybrid, linear pressure   (Section 22.1.4)

C3D20HT 20-node thermally coupled brick, triquadratic displacement, trilinear temperature, hybrid, linear pressure   (Section 22.1.4)

C3D20P 20-node brick, triquadratic displacement, trilinear pore pressure   (Section 22.1.4)

C3D20PH 20-node brick, triquadratic displacement, trilinear pore pressure, hybrid, linear pressure   (Section 22.1.4)

C3D20R 20-node quadratic brick, reduced integration   (Section 22.1.4)

C3D20RE 20-node quadratic piezoelectric brick, reduced integration   (Section 22.1.4)

C3D20RH 20-node quadratic brick, hybrid, linear pressure, reduced integration   (Section 22.1.4)

C3D20RHT 20-node thermally coupled brick, triquadratic displacement, trilinear temperature, hybrid, linear pressure, reduced integration   (Section 22.1.4)

C3D20RP 20-node brick, triquadratic displacement, trilinear pore pressure, reduced integration   (Section 22.1.4)

C3D20RPH 20-node brick, triquadratic displacement, trilinear pore pressure, hybrid, linear pressure, reduced integration   (Section 22.1.4)

C3D20RT 20-node thermally coupled brick, triquadratic displacement, trilinear temperature, reduced integration   (Section 22.1.4)

C3D20T 20-node thermally coupled brick, triquadratic displacement, trilinear temperature   (Section 22.1.4)

C3D27 21 to 27-node brick   (Section 22.1.4)

C3D27H 21 to 27-node brick, hybrid, linear pressure   (Section 22.1.4)

C3D27R 21 to 27-node brick, reduced integration   (Section 22.1.4)

C3D27RH

以上是ABA STANDARD的三维实体单元，除了轴对称等其他单元。
楼主可以采用其他单元类型近似模拟，比如5面体单元，你赋给六面体单元
*element=c3d8
element number，node1，node2，node3，node4，node5，node5
其中有两个节点是相同的。
如果这个方法不行，我也不知道有啥方法了 呵呵

yinsht1116

这样用金字塔单元过度，会不会影响精度呢