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ToPy Problem Definition keywords

This page explains what each ToPy keyword stands for as used in a TDP (ToPy Problem Definition) file. You should also look at the template.tpd file (in the source), which gives more information.

General keywords

KEYWORD	Description
PROB_NAME	Problem name
PROB_TYPE	Problem type
NUM_ELEM_X	Number of elements in the X-direction
NUM_ELEM_Y	Number of elements in the Y-direction
NUM_ELEM_Z	Number of elements in the Z-direction
VOL_FRAC	Volume fraction
FILT_RAD	Filter radius
NUM_ITER	Number of iterations to run
CHG_STOP	Change stop value; controls the number of iterations
P_FAC	Start value of penalty factor (p)
P_INCR	Increment value of the penalty factor
P_CON	Number of iterations to keep the penalty factor constant after each increment
P_MAX	Max value that the penalty factor is allowed to reach
Q_FAC	Start value of extra penalty factor (q) for grey-scale filtering (GSF)
Q_INCR	Analoguous to P_INCR
Q_CON	Analoguous to P_CON
Q_MAX	Analoguous to P_MAX
ETA	Damping factor
APPROX	Type of approximation, reciprocal, exponential or diagonal quadratic
ELEM_K	Type of finite element to use; really specifies the element stiffness matrix to use
FXTR_NODE_X	Node number(s) at which you want to fix the translation in the X direction
FXTR_NODE_Y	Node number(s) at which you want to fix the translation in the Y direction
FXTR_NODE_Z	Node number(s) at which you want to fix the translation in the Y direction
LOAD_NODE_X	Node number(s) at which you require load(s) in the X direction
LOAD_NODE_Y	Node number(s) at which you require load(s) in the Y direction
LOAD_NODE_Z	Node number(s) at which you require load(s) in the Z direction
LOAD_VALU_X	Load value(s) in the X direction
LOAD_VALU_Y	Load value(s) in the Y direction
LOAD_VALU_Z	Load value(s) in the Z direction
PASV_ELEM	Element number(s) at which you require passive (void) elements
ACTV_ELEM	Element number(s) at which you require active (solid) elements

Mechanism synthesis

LOAD_NODE_X_OUT	Node number(s) at which you require the output in the X direction
LOAD_VALU_X_OUT	Value of output at specified OUT node in X direction
LOAD_NODE_Y_OUT	Node number(s) at which you require the output in the Y direction
LOAD_VALU_Y_OUT	Value of output at specified OUT node in Y direction
LOAD_NODE_Z_OUT	Node number(s) at which you require the output in the Z direction
LOAD_VALU_Z_OUT	Value of output at specified OUT node in Z direction