Rigid test

This example shows how to use the PyDYNA pre service to create an ISPH model. The executable file for LS-DYNA is ls-dyna_mpp_d_R13.0_365-gf8a97bda2a_winx64_ifort190_msmpi.exe.

'/server/output'

import os
import sys


from ansys.dyna.core.pre import launch_dynapre
from ansys.dyna.core.pre.dynamaterial import (
    MatRigid,
    MatSPHIncompressibleFluid,
    MatSPHIncompressibleStructure,
)
from ansys.dyna.core.pre.dynaisph import (
    DynaISPH,
    Box,
    Point,
    Curve,
    PartSet,
    ShellPart,
    ShellFormulation,
    ISPHStructPart,
    ISPHFluidPart,
    DOF,
    Motion,
    Gravity,
    GravityOption,
)
from ansys.dyna.core.pre import examples
from ansys.dyna.core.pre.misc import check_valid_ip

hostname = "localhost"
if len(sys.argv) > 1 and check_valid_ip(sys.argv[1]):
    hostname = sys.argv[1]
isphsolution = launch_dynapre(ip = hostname)
fns = []
path = examples.isph_rigidtest + os.sep
fns.append(path + "rigidtest.k")
isphsolution.open_files(fns)

isphsolution.set_termination(0.5)

isphobj = DynaISPH()
isphsolution.add(isphobj)

isphobj.set_timestep(
    tssfac=1, max_timestep=Curve(x=[0, 0.04, 0.05, 0.1, 100], y=[0.5, 0.5, 1, 1, 1])
)
isphobj.isphanalysis.set_box(Box(-750, 800, -800, 800, -100, 3000))

platemat1 = MatRigid(
    mass_density=1e-9,
    young_modulus=10,
    center_of_mass_constraint=1,
    translational_constraint=5,
    rotational_constraint=4,
)
platemat2 = MatRigid(
    mass_density=1e-9,
    young_modulus=10,
    center_of_mass_constraint=1,
    translational_constraint=7,
    rotational_constraint=7,
)
# platemat3 = MatRigid(mass_density=1e-9,young_modulus=10)
# matelastic = MatElastic(mass_density=1e-9,young_modulus=1)
matsphfluid = MatSPHIncompressibleFluid(
    mass_density=1e-9, dynamic_viscosity=1e-9, tension_coefficient1=1e6, tension_coefficient2=1000
)
matsphstruct = MatSPHIncompressibleStructure(mass_density=1e-9)

sensorplane = ShellPart(1)
sensorplane.set_material(platemat2)
sensorplane.set_element_formulation(ShellFormulation.BELYTSCHKO_TSAY)
sensorplane.set_thickness(0.1)
isphobj.parts.add(sensorplane)

movingcube = ShellPart(7)
movingcube.set_material(platemat1)
movingcube.set_element_formulation(ShellFormulation.BELYTSCHKO_TSAY)
movingcube.set_thickness(0.1)
isphobj.parts.add(movingcube)

wallsmesh = ShellPart(8)
wallsmesh.set_material(platemat2)
wallsmesh.set_element_formulation(ShellFormulation.BELYTSCHKO_TSAY)
wallsmesh.set_thickness(0.1)
isphobj.parts.add(wallsmesh)

sphwall = ISPHStructPart(4, PartSet([8]), 12)
sphwall.set_material(matsphstruct)
sphwall.set_smoothing_length(1, 1, 1, 12)
isphobj.parts.add(sphwall)

sphcube = ISPHStructPart(5, PartSet([7]), 12)
sphcube.set_material(matsphstruct)
sphcube.set_smoothing_length(1, 1, 1, 12)
isphobj.parts.add(sphcube)

sphwater = ISPHFluidPart(6, Point(-588, -588, 9), Point(1176, 1176, 204), 98, 98, 17)
sphwater.set_material(matsphfluid)
sphwater.set_smoothing_length(1, 1, 1, 12)
sphwater.create_massflow_plane(PartSet([1]))
isphobj.parts.add(sphwater)

# Constraint
isphobj.constraints.merge_two_rigid_bodies(7, 1)

# Define boundary conddition
isphobj.boundaryconditions.create_imposed_motion(
    PartSet([7]),
    Curve(x=[0, 0.1, 0.11, 20], y=[3000, 3000, 0, 0]),
    dof=DOF.X_TRANSLATIONAL,
    motion=Motion.VELOCITY,
)
isphobj.boundaryconditions.create_imposed_motion(
    PartSet([7]),
    Curve(x=[0, 0.1, 0.11, 20], y=[500, 500, 500, 500]),
    dof=DOF.Z_ROTATIONAL,
    motion=Motion.VELOCITY,
    scalefactor=0.01,
)

# Load
g = Gravity(dir=GravityOption.DIR_Z, load=Curve(x=[0, 100], y=[9810, 9810]))
isphobj.add(g)

isphsolution.set_output_database(glstat=0.001, sphmassflow=0.001)
isphsolution.create_database_binary(dt=0.01)
isphsolution.save_file()