You can define contact in a motion study to prevent parts from
penetrating each other during motion. You can include Contact with Basic Motion and Motion
Analysis.
To configure Contact in a motion study:
Click Contact
(MotionManager toolbar).
Contact between components is ignored unless you configure Contact in the motion study. If you do not use Contact to specify contact, components pass through each other.
Contact Type
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Solid Bodies |
Adds 3-dimensional contact between moving components to the motion study.
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 |
Curves |
Adds two-dimensional contact between two touching curves to
the motion study. |
Selections for Solid Body Contact
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Use contact groups
|
Enables contact group selection for the Motion
Analysis study. Motion Analysis with contact
groups ignores contact between parts in the group, but considers
contact between all combinations of pairs of components across
two groups.
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Components
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Lists the selected components whose contact is
considered in the Motion Analysis study. Available when
Use contact groups is
cleared.
Motion Analysis without
contact groups ignores contact between components outside of the
selection set and considers only contact between all possible
pairs of selected components.
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Group1: Components
|
Lists selected components in the first contact
group. Available when Use contact groups
is selected.
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Group2: Components
|
Lists selected components in the second contact
group. Available when Use contact
groups is selected.
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Contact pairs are component pairs you select to monitor for contact. The more contact pairs, the slower the motion calculation.
Selections for Curve-to-Curve Contact (Motion Analysis Only)
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Curve 1 |
Specifies the first curve or edge in contact.
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Curve 2
|
Specifies the curve or edge that makes contact
with the first curve. |
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Outward Normal
Direction |
Changes the normal direction of the contact force
on the component that includes the selected curve or edge. |
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SelectionManager |
Opens the SOLIDWORKS SelectionManager to select
the two curves or edges. See SOLIDWORKS
Help: SelectionManager. |
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Curves always touch
|
When cleared, defines intermittent curve-to-curve
contact for curves or edges in parallel planes.
When selected, defines continual curve-to-curve
contact for curves or edges in the same plane.
|
Material (Motion Analysis only)
Select materials for each contact pairs or groups of pairs. The material
properties that you select are applicable to touching faces during actual contact.
It overrides the material properties assigned to each part. The order in which you
select the materials does not matter. Consequently, selecting rubber-steel is the
same as selecting steel-rubber.
Clear Material to modify the Elastic Properties.
Elastic Properties
When you know elastic properties from experimental or simulated data, clear Material in the Contact PropertyManager to enter this data.
Impact |
Stiffness |
Sets the stiffness k to approximate the material stiffness at the boundary of interaction between the two parts in collision.
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Exponent |
Sets the exponent e in the assumed exponential force versus displacement model. |
Max. damping |
Sets the maximum damping coefficient cmax of the boundary interaction. |
Penetration |
Sets the positive boundary penetration value dmax at which the SOLIDWORKS Motion solver applies cmax , the Max. damping value.
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The SOLIDWORKS Motion solver uses a damping value that is less than Max. damping when calculating penetrations less than Penetration.
Impact Equation
Fn = k * (ge) + Step (g, 0,0, dmax, cmax) * dg/dt
Fn |
Impact force |
g |
Penetration of one geometry into another |
dg/dt |
Penetration velocity at the contact point |
Restitution coefficient |
Coefficient |
Sets the ratio of relative velocities of two elastic spheres before and after impact. |