Bulk Data Entry Used to define the stiffness and stress coefficient of a
scalar elastic element (spring) by means of the CELAS1 or
CELAS3 entry.
This property is not affected by translational and rotational stiffness limits specified
using PARAM,ELASSTIF.
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
PELASFX |
PID |
K |
GE |
S |
PID |
K |
GE |
S |
|
Example
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
PELASFX |
7 |
4.29 |
|
7.92 |
27 |
2.17 |
|
|
|
Definitions
Field |
Contents |
SI Unit Example |
PID |
Unique scalar elastic property identification
number. No default (Integer > 0)
|
|
K |
Elastic property value. No default
(Real)
|
|
GE |
Damping coefficient. To obtain the damping coefficient GE,
multiply the critical damping ratio,
C/C0
, by 2. GE is ignored in
transient analysis, if PARAM, W4 is not
specified.
Default = 0.0 (Real)
|
|
S |
Stress coefficient. Default = 0.0
(Real)
|
|
- Be
careful using negative spring values.
- One
or two elastic spring properties may be defined on
a single entry.
- The
element force of a spring is calculated from the equation:(1)
f=k*(u1−u2)
Where,
-
k
- Stiffness coefficient for the scalar element.
-
u1
- Displacement of the first degree-of-freedom listed on the CELAS1 and CELAS3 entries.
Element stresses are calculated from the equation:
(2)
s=S*f
Where,
S
is the stress coefficient as defined
above.
- This
card is represented as a property in HyperMesh.