# NOLIN1

Bulk Data Entry Defines nonlinear transient forcing functions of the form.

Function of displacement:(1)
${P}_{i}\left(t\right)=S·T\left({u}_{j}\left(t\right)\right)$
Function of velocity:(2)
${P}_{i}\left(t\right)=S\cdot T\left({\stackrel{˙}{u}}_{j}\left(t\right)\right)$

Where, ${u}_{j}\left(t\right)$ and ${\stackrel{˙}{u}}_{j}\left(t\right)$ are the displacement and velocity at point GJ in the direction of CJ.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
NOLIN1 SID GI CI S GJ CJ TID

## Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
NOLIN1 21 3 4 2.1 3 10 6

## Definitions

Field Contents SI Unit Example
SID Nonlinear load set identification number.

No default (Integer > 0)

GI Grid or scalar point identification number at which nonlinear load is to be applied.

No default (Integer > 0)

CI Component number for GI.

No default (1 ≦ Integer ≤ 6; blank or 0, if GI is a scalar point)

S Scale factor.

No default (Real)

GJ Grid or scalar point identification number.

No default (Integer > 0)

CJ Component number for GJ, according to the following table:
TID Identification number of a TABLED1, TABLED2, TABLED3, or TABLED4 entry.

No default (Integer > 0)

Type Displacement Velocity
Grid 1 ≤ Integer ≤ 6 11 ≤ Integer ≤ 16
Scalar Blank or 0 Integer = 10

${\stackrel{˙}{u}}_{j,t}=\frac{{u}_{j,t}-{u}_{j,t-1}}{\Delta t}$
$\Delta t$
${u}_{j,t-1}$