Field

Class Field()

Field(parent='MODEL', name='Field_n', label='Field_n', active=True, 
b1=None, b2=None, k=36 * [0], c=36 * [0], f=6 * [0], length=6 * [0], 
damping_type='CRATIO', cratio=0, origin=None, ornt_meth='TWOAXES')

Creates a field.

Keyword Arguments


Argument	Data Type	Description	Default
name	String	The variable name.	Field_n, for next available integer n.
label	String	The descriptive label.	Field_n, for next available integer n.
parent	Object	The parent.	MODEL
active	Boolean	Used to activate or deactivate this entity.	True
b1	Body	The first body constrained by the field.	None
b2	Body	The second body constrained by the field.	None
k	NumericVector	Stiffness values of the 6x6 stiffness matrix.	36*[0]
c	NumericVector	The damping coefficients of the 6x6 damping matrix.	36*[0]
f	NumericVector	The force values for the six components (3 forces, 3 torques) at the corresponding lengths (length1 : length6). Zero force would mean a free length at the given lengths.	6*[0]
length	NumericVector	The reference lengths between the i marker and the j marker.	6*[0]
damping_type	Enum	Use CRATIO to apply damping as a percentage of stiffness, or use MATRIX to supply a 6x6 damping matrix. One of MATRIX or CRATIO.	CRATIO
cratio	Double	Damping as a percentage of stiffness, applied to each stiffness.	0
origin	Reference	The location.	None
ornt_meth	Enum	The orientation method. One of TWOAXES, ONEAXIS or ANGLES.	TWOAXES
ornt_dir1	Enum	The direction used to orient axis 1. One of X, Y or Z.	Z
align_meth1	MultiRef	Alignment method for axis 1. One of Point, Vector or DxDyDz.	DxDyDz
align_pt1	Reference	The point when align_meth1 is Point.	None
align_vec1	Reference	The point reference when align_meth1 is Point.	None
ornt_dir2	Enum	The direction used to orient axis 2. One of X, Y or Z.	X
align_meth2	MultiRef	Alignment method for axis 1. One of Point, Vector or DxDyDz.	DxDyDz
align_pt2	Reference	The point when align_meth2 is Point.	None
align_vec2	Reference	The point reference when align_meth2 is Point.	None
e1	Double	The e1 Euler angle (z:x':z'') in radians with respect to rm.	0
e2	Double	The e2 Euler angle (z:x':z'') in radians with respect to rm.	0
e3	Double	The e3 Euler angle (z:x':z'') in radians with respect to rm.	0
rm	Reference	The reference marker when ornt_meth is ANGLES.	Global_Frame
x1	Double	The direction cosine x1 for axis 1.	0
y1	Double	The direction cosine y1 for axis 1.	0
z1	Double	The direction cosine z1 for axis 1.	1
x2	Double	The direction cosine x2 for axis 2.	1
y2	Double	The direction cosine y2 for axis 2.	0
z2	Double	The direction cosine z2 for axis 2.	0
user	Bool	Use user defined properties, if true.	False
usr_sub	Function	The expression passed to the user dll. When using solver expressions, Templex syntax (within ``) is used and all variables are enclosed in braces {} and the rest is treated as literal.	'USER()'
local_funcname	String	The function/subroutine name.	'MOTSUB'
use_local_dll	Bool	Uses a local function instead of default if True.	False
local_dll	File	The path of the local dll which has the local_funcname.	''
local_func_type	Enum	The type of the user subroutine. one of DLL, PYTHON or MATLAB.	'DLL'

Instances


Instance	Type	Description
xaxis	Vector	The vector in x direction of orientation.
yaxis	Vector	The vector in y direction of orientation.
zaxis	Vector	The vector in z direction of orientation.

Examples

Create and modify attributes of a Field.

   >>> # Import mview module
   >>> from hw import mview
   >>> #Create a field
   >>> f = mview.Field()
   >>> b_1 = mview.Body()
   >>> b_2 = mview.Body()
   >>> p1 = mview.Point()
   >>> f.b1 = b_1
   >>> f.b2 = b_2
   >>> f.origin = p1
   >>> f.b1.name
   'Body_1'
   >>> f.b2.name
   'Body_2'
   >>> f.damping_type
   'CRATIO'
   >>> # Change the damping value
   >>> f.cratio = 0.4
   >>> f.cratio
   0.4
   >>> # Change the force values for the six components
   >>> f.f = [1,2,3,4,5,6]
   >>> f.f
   [1.0, 2.0, 3.0, 4.0, 5.0, 6.0]