Body

Class Body()

class Body(parent='MODEL', name='Body_n', label='Body_n', active=True, mass=0.0, 
ixx=0.0, ixy=0.0, iyz=0.0, ixz=0.0, iyy=0.0, izz=0.0, use_vx=False, use_vy=False, 
use_vz=False, use_wx=False, use_wy=False, use_wz=False, vx=0.0, vy=0.0, vz=0.0, wx=0.0, 
wy=0.0, wz=0.0, use_vm=False, use_wm=False, vm=None, wm=None, usecm=False, 
useim=False, uselprf=False, cg=None, im_origin=None, lprf_origin=None, use_flex=False, 
inertia_props_from_graphic=False)

Rigid body.

setValue, getValue, getAssociatedGraphics

Keyword Arguments

Argument	Data Type	Description	Default
name	String	The variable name.	Body_n, for next available integer n.
label	String	The descriptive label.	Body_n, for next available integer n.
parent	Object	The parent.	MODEL
active	Bool	Used to activate or deactivate this entity.	True
mass	Double	The mass.	0
ixx	Double	The ixx inertia property with respect to the inertia coordinate system.	0
iyy	Double	The iyy inertia property with respect to the inertia coordinate system.	0
izz	Double	The izz inertia property with respect to the inertia coordinate system.	0
ixy	Double	The ixy inertia property with respect to the inertia coordinate system.	0
iyz	Double	The iyz inertia property with respect to the inertia coordinate system.	0
ixz	Double	The ixz inertia property with respect to the inertia coordinate system.	0
use_vx	Bool	Use initial translation velocity in x direction when True.	False
use_vy	Bool	Use initial translation velocity in y direction when True.	False
use_vz	Bool	Use initial translation velocity in z direction when True.	False
use_wx	Bool	Use initial rotational velocity about x when True.	False
use_wy	Bool	Use initial rotational velocity about y when True.	False
use_wz	Bool	Use initial rotational velocity about z when True.	False
vx	Double	The initial translation velocity in x direction.	0
vy	Double	The initial translation velocity in y direction.	0
vz	Double	The initial translation velocity in z direction.	0
wx	Double	The initial rotational velocity about x.	0
wy	Double	The initial rotational velocity about y.	0
wz	Double	The initial rotational velocity about z.	0
usevm	Bool	Use reference marker (vm) for initial translational velocity when True.	False
usewm	Bool	Use reference marker (wm) for initial rotational velocity when True.	False
vm	Marker	The reference marker (vm) for initial translational velocity.	0
wm	Marker	The reference (vm) for initial rotational velocity.	0
usecm	Bool	Use center of mass coordinate system when True.	False
useim	Bool	Use inertia coordinate system when True.	False
uselprf	Bool	Use body coordinate system when True.	False
cg	Point	The origin for center of mass coordinate system.	None
im_origin	Point	The origin for inertia coordinate system.	None
lprf_origin	Point	The origin for body coordinate system.	None
useflex	Bool	Use as a flexible body if True.	False
inertia_props_from_graphic	Bool	Use properties from associated inertia graphic when True.	False

Instances

Instance	Type	Description
cm	Marker	Marker for center of mass coordinate system.
im	Marker	Marker for inertia coordinate system.
lprf	Marker	Marker for body coordinate system.
flex	FlexBody	Flexbody when useflex is True.

Readonly Properties

geomprops (InertiaProps) - Inertia properties of the body when get properties from associated graphics [inertia_props_from_graphic] is True. Defaults to -.

Notes

1. The parent parameter can only be initialized by the constructor and should not be modified directly.

2. Only parent can be used as a positional argument in the constructor.

3. Instance is a reference to an entity. You cannot modify an instance, but can modify its properties.

4. Readonly Properties cannot be modified.

Methods

getAssociatedGraphics()

Get all the graphics that are associated with this object.

Returns:

List of all graphic associated with this body.

Return type:

(list)

getValue(name)

Returns value of an attribute.

Parameters:

name (str) - Name of the attribute. Defaults to -.

Returns:

The return value. Return type depends on the attribute type.

setValue(name, value)

Sets value of an attribute.

Parameters:


name	str	Name of the attribute.
value	**	Value of the attribute to be set.

Returns:

Returns True if the value was successfully set else False.

Return type:

Bool

Body Pair

Class BodyPair()

BodyPair(parent='MODEL', name='Point_n', label='Point_n', active=True, sym='NONE')

Body pair containing left and right instances of singles.

Keyword Arguments

Argument	Data Type	Description	Default
name	String	The variable name.	BodyPair_n, for next available integer n.
label	String	The descriptive label.	BodyPair_n, for next available integer n.
parent	Object	The parent.	MODEL
active	Bool	Defines if entity is activated when True or deactivated when False.	True
sym	Enum	The symmetry of pair entity. Takes values 'LEFT' for left entity as leader, 'RIGHT' for right entity as leader or 'NONE' when it is not symmetric.	NONE

Instances

Instance	Type	Description
l	Point	The left body.
r	Point	The right body.

Notes

Instance is a reference to an entity. You cannot modify an instance, but can modify its properties.

Inertia Props

Class InertiaProps()

InertiaProps(**kwds)

Utility class to hold inertia properties of a body when body gets inertia properties from associated graphics.

Notes

You cannot create instances of the InertiaProps class. This class is used to modify the inertia properties of a body when it gets the properties from associated graphics.

Readonly Properties:

Argument	Data Type	Description	Default
mass	Double	The mass of associated graphics.	-
ixx	Double	The ixx inertia property with respect to center of mass coordinate system of associated graphics.	-
iyy	Double	The iyy inertia property with respect to center of mass coordinate system of associated graphics.	-
izz	Double	The izz inertia property with respect to center of mass coordinate system of associated graphics.	-
ixy	Double	The ixy inertia property with respect to center of mass coordinate system of associated graphics.	-
iyz	Double	The iyz inertia property with respect to center of mass coordinate system of associated graphics.	-
ixz	Double	The ixz inertia property with respect to center of mass coordinate system of associated graphics.	-
cg	Point	The origin for center of mass coordinate system.	-
cm	Marker	The marker for center of mass coordinate system.	-

Flexbody

Class Flexbody()

Flexbody(kwds)

Utility class to hold and modify properties of a body when it is flexible (flexbody).

Notes

You cannot create instances of the Flexbody class. This class is used to modify the properties of a body when it is flexible.

Keyword Arguments

Argument	Data Type	Description	Default
MotionSolve.graphic_file	File	This file is used for visual display of the flexbody. Any relocation of this graphic will also be applied to the functional files.	''
MotionSolve.h3d_file	File	The H3D file.	''
MotionSolve.anim_scale	Double	The animation scale.	1
MotionSolve.rigidify	Bool	Flag to set the flexbody as rigid with the mass inertia properties from the flexbody data.	False
MotionSolve.inc_geom_non_lin	Bool	Include geometric stiffness data when True.	False
ADAMS.graphic_file	File	Graphic file for solver mode Adams.	''
ADAMS.h3d_file	File	H3D file for solver mode Adams.	''
ADAMS.mtx_file	File	MTX file for solver mode Adams.	''
ADAMS.input_type	Enum	Input type for solver mode Adams. One of CMS_H3D or CMS_MTX.	CMS_H3D
ABAQUS.graphic_file	File	Graphic file for solver mode Abaqus.	''
ABAQUS.inp_file	File	Inp file for solver mode Abaqus.	''
ABAQUS.sup_file	File	Sup file for solver mode Abaqus.	''
ABAQUS.input_type	Enum	Input type for solver mode Abaqus. The functional source. One of CMS or FEA.	CMS
ABAQUS.damping_type	Enum	Damping type for solver mode Abaqus. One of DEFAULT, CRATIO, ALPHA, BETA, ALPHA_BETA.	DEFAULT
ABAQUS.cratio	Double	Damping ratio for the Abaqus flex body.	0
ABAQUS.alpha	Double	Defaults to 0. * ABAQUS.beta (Double)	0

Instances

Instance	Type	Description
MotionSolve	FlexMotionSolveData	Instance which holds the flex body solver data when solver mode is MotionSolve.
ADAMS	FlexAdamsData	Instance which holds the flex body solver data when solver mode is Adams.
ABAQUS	FlexAbaqusData	Instance which holds the flex body solver data when solver mode is Abaqus.

Readonly Properties

Argument	Data Type	Description	Default
mass	Double	The mass of the flexible body.	-
cm_x	Double	The x coordinate of center of mass of the body.	-
cm_y	Double	The y coordinate of center of mass of the body.	-
cm_z	Double	The z coordinate of center of mass of the body.	-
ixx	Double	The ixx inertia property with respect to center of mass.	-
ixy	Double	The ixy inertia property with respect to center of mass.	-
ixz	Double	The ixz inertia property with respect to center of mass.	-
iyx	Double	The iyx inertia property with respect to center of mass.	-
iyy	Double	The iyy inertia property with respect to center of mass.	-
iyz	Double	The iyz inertia property with respect to center of mass.	-
izx	Double	The izx inertia property with respect to center of mass.	-
izy	Double	The izy inertia property with respect to center of mass.	-
izz	Double	The izz inertia property with respect to center of mass.	-

Methods

createPointsAtInterfaceNodes()

Create MDL points at current interface nodes.

Returns:

None.

getInterfaceNodeCoordByIndex(idx)

Retrieves the interface node coordinate using an index number.

Parameters:

idx (int): The index number of the interface node.

Returns:

A list of x y z coordinates.

Return type:

list

getInterfaceNodeIdByIndex(idx)

Retrieves the interface node ID using an index number.

Parameters:

idx (int): The index number of the interface node.

Returns:

Node ID using a corresponding index number.

Return type:

int

getNodeCoordByIndex(idx)

Retrieves the node coordinate using an index number.

Parameters:

idx (int): The index number of the node.

Returns:

A list of x y z coordinates.

Return type:

list

getNumInterfaceNodes()

Retrieves the number of interface nodes in the flexbody.

Returns:

The number of interface nodes.

Return type:

int

getNumNodes()

Retrieves the number of nodes in the flexbody.

Returns:

The number of nodes.

Return type:

int

Examples

>>> from hw import mview
   >>> #Create a body and get values
   >>> b1 = mview.Body(name='b1',label='Body1')
   >>> b1.mass
   0.0
   >>> b1.name
   'b1'
   >>> #Set multiple values at once
   >>> b1.setValues(mass=10,ixx=100,iyy=5000)
   >>> b1.iyy
   5000
   >>> #Use graphic for intertia properties
   >>> b1.intertia_props_from_graphic = True
   >>> #Center of mass marker
   >>> b1.usecm = True
   >>> p1 = mview.Point(name='PointForCM', label='PointForCM')
   >>> b1.cm.origin = p1
   >>> b1.cg.name
   'PointForCM'
   >>> #Aligning CM marker
   >>> b1.cm.align_meth1 = 'DxDyDz'
   >>> b1.cm.ornt_meth = 'ANGLES'
   >>> b1.e1 = 20
   >>> b1.cm.e1 = 20
   >>> #Reference marker for CM
   >>> m1 = mview.Marker(label='Reference')
   >>> b1.cm.rm = m1
   >>> #Make the body flexible get the H3D
   >>> b1.useflex = True
   >>> b1.rigidify = True
   >>> b1.rigidify
   True
   >>> b1.flex.MotionSolve.graphic_file = r"C:/Users/user/Desktop/flexfile.h3d"
   >>> b1.flex.MotionSolve.h3d_file = b1.flex.MotionSolve.graphic_file
   >>> #Set initial conditions for BodyPair
   >>> b2 = mview.BodyPair(name='b_2',sym='NONE')
   >>> b2.l.use_vx = True
   >>> b2.l.vx = 25
   >>> b2.l.vx
   25.0
   >>> b2.r.use_wy = True
   >>> #Set paramteric value
   >>> b2.r.wy = "b_2.l.vx/12"

Create a flexbody and modify its properties.
   >>> from hw import mview
   >>> b = mview.Body(name='b_0', useflex=True)
   >>> b.flex.MotionSolve.graphic_file = r'C:/Users/Training/sla_flex.h3d'
   >>> b.flex.MotionSolve.h3d_file = r'C:/Users/Training/sla_flex.h3d'
   >>> b.flex.getNumInterfaceNodes()
   4
   >>> b.uselprf = True
   >>> b.lprf_origin = mview.Point(x=1,y=3)
   >>> b.flex.createPointsAtInterfaceNodes()