The contact is that two bodies are affected by their forces after they contact each other. It is important in the mechanical system as a cam and latch device. On the contrary to this, it is caused by abnormal vibration and noise. If a contact is defined between two geometries, you can calculate a contact force by the amount of interface and give it to each body.
RecurDyn supports various contact entities such as following table. The user can create the contact forces by using the contact entities in the Contact group.
|
General |
Primitive 3D |
2D |
|
Solid |
SphereToSphere |
Geo Curve |
|
Geo Surface |
SphereInSphere |
Geo Circle |
|
Geo Sphere |
SphereToCylinder |
CircleToCircle |
|
Geo Cylinder |
SphereInCylinder |
CircleInCircle |
|
Geo Curve To Surface |
SphereToBox |
CircleToCurve |
|
SurfaceToSurface |
SphereInBox |
CurveToCurve |
|
ExtendedSurfaceToSurface |
SphereToTorus |
Cam2D |
|
SphereToSurface |
SphereInTorus |
CamLine2D |
|
CylinderToSurface |
SphereToCone |
|
|
UV Sphere |
SphereInCone |
|
|
CylinderToCylinder |
| |
|
CylinderInCylinder |
| |
|
CylinderToBox |
| |
|
ConeToCone |
| |
|
ConeInCone |
| |
|
ConeToCylinder |
| |
|
SphereToArcRevolution |
| |
|
|
SphereToArcExtrusion |
|
The contact of a simple geometry as sphere is light the load of contact calculation and is easy to set each parameter. On the contrary to this, the contact of a surface or patch is high to general characteristic and can define any surface. Instead, the parameter setting becomes complex and the load of contact calculation is high. Therefore, you should use the contact of simple geometry.
Guideline for RecurDyn Contact Type
There are 3 types of contact.
•Primitive Contact such as Sphere to Sphere.
•Semi-Primitive Contact such as Sphere to Surface
•General Contact such as Surface to Surface, Extended Surface to Surface, Solid, and Geo contacts.
Recommended Selection of RecurDyn Contact entities
1. If you can apply the primitive contact, please use “Primitive Contact”
2. If you can apply the semi-primitive contact, please use “Semi-Primitive Contact”. For this type of contact, FB will try to implement with “Geo Surface” contact in future.
3. For the general contact problem, you can choose “Solid” or “Geo Surface” contact. If you want to use “Surface to Surface” contact or “Extended Surface to Surface” contact, please use “Geo Surface” contact.
4. For the rigid contact and convex-convex problem, you can choose the “Solid” contact for more fast solution.
Recommended Selection of RecurDyn Contact entities [2D problem]
1. If you can apply the primitive contact, please use “Primitive Contact” such as Circle to Circle.
2. If you can apply the semi-primitive contact, please use “Semi-Primitive Contact”. For this type of contact, FB will try to implement with “Geo Curve” contact in future.
3. For the general contact problem, you can choose “Geo Curve” contact. If you want to use “Curve to Curve” contact, please use “Geo Curve” contact.