# Force: Bushing

Command ElementModifies a BUSHING force element.

## Format

```
<Force_Bushing
id =
```*"integer"*
i_marker_id = *"integer"*
j_marker_id = *"integer"*
kx = *"real"*
ky = *"real"*
kz = *"real"*
ktx = *"real"*
kty = *"real"*
ktz = *"real"*
cx = *"real"*
cy = *"real"*
cz = *"real"*
ctx = *"real"*
cty = *"real"*
ctz = *"real"*
preload_x = *"real"*
preload_y = *"real"*
preload_z = *"real"*
preload_tx = *"real"*
preload_ty = *"real"*
preload_tz = *"real"*
/>

## Attributes

`id`- Element identification number (integer>0). This number is unique among all Force_Bushing elements and uniquely identifies the element.
`i_marker_id`- Specifies the Reference_Marker at which the force is applied. This is designated as the point of application of the force.
`j_marker_id`- Specifies the Reference_Marker at which the reaction force and moment are applied. This is designated as the point of reaction of the force.
`kx`,`ky`,`kz`,`ktx`,`kty`,`ktz`- These define the diagonal entries for a 6x6 stiffness matrix that is used to calculate the
spring force for Force_Bushing. All stiffness
values must be non-negative, in other words, K
_{ij}≥ 0. `cx`,`cy`,`cz`,`ctx`,`cty`,`ctz`- These define the diagonal entries for a 6x6 damping matrix that is used to calculate the damping
force for Force_Bushing. All damping values must be
non-negative, in other words, C
_{ij}≥ 0. `preload_x`,`preload_y`,`preload_z`,`preload_tx`,`preload_ty`,`preload_tz`- These define the pre-loads in the Force_Bushing element. In other words, the forces at I when there is deformation. The force and torque components are measured in the J coordinate system. The first three components define the pre-load force while the last three are pre-load torques. The data is optional. Their default values are 0.

## Example

```
<Force_Bushing
id = "207006"
kx = "6000."
cx = "6."
preload_x = "0."
ky = "6000."
cy = "6."
preload_y = "0."
kz = "1000."
cz = "1."
preload_z = "0."
ktx = "500000."
ctx = "500."
preload_tx = "0."
kty = "500000."
cty = "500."
preload_ty = "0."
ktz = "100000."
ctz = "100."
preload_tz = "0."
/>
```