#### Command list

• Input handling
• Solution control and techniques
• Output
• Mesh commands
• Nodes and connectivity
• Material properties
• Initial conditions
• Boundary conditions
• Contact and tied interfaces
• Rigid bodies
• Connectors
• Parameters and functions
• Geometries
• Sets
• Coordinate system
• Particle
• SPH

### SPH

###### SPH
*SPH
entype, enid, $\mu$
pid${}_{\mathrm{1}}$, gid${}_{\mathrm{1}}$, $dx_1$, $dy_1$, $dz_1$, $\alpha_1$, $\beta_1$, $v^{max}_1$
.
pid${}_n$, gid${}_n$, $dx_n$, $dy_n$, $dz_n$, $\alpha_n$, $\beta_n$, $v^{max}_n$

#### Parameter definition

VariableDescription
entype Structure entity type for SPH-structure interaction
options: P, PS
enid Structure entity ID
$\mu$ Friction
pid${}_{\mathrm{1}}$ Part ID
gid${}_{\mathrm{1}}$ Geometry ID that defines a region in space that will be filled with SPH nodes
$dx_1$ Node spacing in x-direction
$dy_1$ Node spacing in y-direction
default: dy${}_{\mathrm{1}}$ = dx${}_{\mathrm{1}}$
$dz_1$ Node spacing in z-direction (if $dz_1 = z_1 - z_0$ then a 2D model is generated)
default: dz${}_{\mathrm{1}}$ = dx${}_{\mathrm{1}}$
$\alpha_1$ Linear artificial viscosity term
default: 0.1
$\beta_1$ Quadratic artificial viscosity term
default: 0.5
$v^{max}_1$ Max expected velocity
default: 10% of the sound speed in the material
pid${}_n$ Part ID
gid${}_n$ Geometry ID that defines a region is space that will be filled with SPH nodes
$dx_n$ Node spacing in x-direction
$dy_n$ Node spacing in y-direction
default: dy${}_{\mathrm{n}}$ = dx${}_{\mathrm{n}}$
$dz_n$ Node spacing in z-direction (if $dz_n = z_1 - z_0$ then a 2D model is generated)
default: dz${}_{\mathrm{n}}$ = dx${}_{\mathrm{n}}$
$\alpha_n$ Linear artificial viscosity term
default: 0.1
$\beta_n$ Quadratic artificial viscosity term
default: 0.5
$v^{max}_n$ Maximum expected velocity
default: 10% of the sound speed in the material

#### Description

Defines SPH geometries/grids and interaction between SPH nodes and structure.