公开(公告)号：US20110218781A1

公开(公告)日：2011-09-08

申请号：US12910632

申请日：2010-10-22

Applicant: Pierre L'Eplattenier

Inventor： Pierre L'Eplattenier

IPC: G06F17/50 ,  G06F17/10 ,  G06F17/11 ,  G06F17/13 ,  G06F7/60

CPC classification number: G06F7/60 ,  G06F17/10 ,  G06F17/11 ,  G06F17/13 ,  G06F17/50

Abstract: Systems and methods of numerically simulating physical phenomena of firing an electromagnetic rail-gun using a coupled FEM-BEM procedure are disclosed. Electromagnetic rail-gun includes a pair of parallel rails and a projectile located therebetween. Rails and projectile are represented by a FEM model, while the ambient air surrounding the rail-gun is represented by a BEM mesh for simulating the electromagnetic fields. The BEM mesh is generated from the FEM model as a surface encasing the projectile and rails. A sliding contact interface between each of the rails and the projectile causes the BEM faces in contact to be removed and thus resulting into a hole/gap in the BEM mesh. The hole/gap is patched up with new triangular BEM faces without adding new nodes in accordance with a predefined set of rules, such that the resulting BEM mesh is suitable for carrying out the coupled FEM-BEM procedure.

Abstract translation: 公开了使用耦合FEM-BEM程序对电磁轨道枪进行数字模拟物理现象的系统和方法。 电磁轨道枪包括一对平行轨道和位于其间的射弹。 轨道和射弹由FEM模型表示，而围绕轨道枪的环境空气由用于模拟电磁场的BEM网格表示。 BEM网格是从FEM模型生成的，作为包围射弹和轨道的表面。 每个轨道和抛射体之间的滑动接触界面导致接触的BEM面被去除，从而在BEM网格中形成孔/间隙。 孔/间隙用新的三角形BEM面进行修补，而不会根据预定义的一组规则添加新的节点，使得所得的BEM网格适合于执行耦合的FEM-BEM过程。

公开(公告)号：US08489372B2

公开(公告)日：2013-07-16

申请号：US12910632

申请日：2010-10-22

Applicant: Pierre L'Eplattenier

Inventor： Pierre L'Eplattenier

IPC: G06F7/60 ,  G06F17/00 ,  G06G7/48

CPC classification number: G06F7/60 ,  G06F17/10 ,  G06F17/11 ,  G06F17/13 ,  G06F17/50

Abstract: Systems and methods of numerically simulating physical phenomena of firing an electromagnetic rail-gun using a coupled FEM-BEM procedure are disclosed. Electromagnetic rail-gun includes a pair of parallel rails and a projectile located therebetween. Rails and projectile are represented by a FEM model, while the ambient air surrounding the rail-gun is represented by a BEM mesh for simulating the electromagnetic fields. The BEM mesh is generated from the FEM model as a surface encasing the projectile and rails. A sliding contact interface between each of the rails and the projectile causes the BEM faces in contact to be removed and thus resulting into a hole/gap in the BEM mesh. The hole/gap is patched up with new triangular BEM faces without adding new nodes in accordance with a predefined set of rules, such that the resulting BEM mesh is suitable for carrying out the coupled FEM-BEM procedure.

Abstract translation: 公开了使用耦合FEM-BEM程序对电磁轨道枪进行数字模拟物理现象的系统和方法。 电磁轨道枪包括一对平行轨道和位于其间的射弹。 轨道和射弹由FEM模型表示，而围绕轨道枪的环境空气由用于模拟电磁场的BEM网格表示。 BEM网格是从FEM模型生成的，作为包围射弹和轨道的表面。 每个轨道和抛射体之间的滑动接触界面导致接触的BEM面被去除，从而在BEM网格中形成孔/间隙。 孔/间隙用新的三角形BEM面修补，而不会根据预定义的一组规则添加新的节点，使得所得的BEM网格适合于执行耦合的FEM-BEM过程。