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numeric_results create percent_difference

Allows you to calculate the percent difference of two real result set components using the formula:

((x1-x2)*100/x1)

where:  

x1 is an element of the first component

x2 is an element of the second component

Note that:

•	If x1 is zero and x2 is zero, the result is zero.

•	If x1 is zero and x2 is nonzero, the result is +/- infinity with the sign taken from x2.

Format:

 

numeric_results create percent_difference
new_result_set_component_name=	new result_set
result_set_component_names =	existing result set components
units =	type of units

Example:

 

numerical_results create percent_difference &
new_result_set_component_name =	dingdong.bell &
result_set_component_name =	res101.x, res102.y

Description:

 

Parameter	Value Type	Description
new_result_set_component_name	New ResulT Set Name	Identifies the new result set component.
result_set_component_names	Existing Result Set Components	Identifies two result set components on which to perform the operation.
Units	No_units, Calculate, Length, Angle, Mass, Density, Time, Area, Volume, Velocity, Acceleration, Angular_velocity, Angular_acceleration, Inertia, Area_inertia, Damping, Stiffness, Torsion_stiffness, Torsion_damping, Force, Torque, Pressure, Force_time, Torque_time	Specifies the type of units to be used for the new result set component. Once you set the unit type, Adams/View can perform the proper unit conversion on the data.

Extended Definition:

1.	The heirarchy of a model's results is shown below with the components of a result set under the result set:

If you want to store the component:

•	In an existing result set, the name must include the result set. For example, assume you have a request file called SHIFT.REQ, and it contains the result set REQ1. If you want to store the new result set component in result set REQ1 with the component name NEW, enter:

.SHIFT.REQ1.NEW (It is not necessary to include .SHIFT., if SHIFT is the current analysis_name).

•	In a new results set, named REQ99, for example, in the analysis run SHIFT, enter .SHIFT.REQ99.NEW. The number of components to be stored is inferred by the number of components named in this parameter. You can enter multiple names separated with commas (,).

The component name must be unique, even though it can be stored in an existing result set. A result set name can be of any length and any combination of alphanumeric characters. The leading character must be a letter.

Result sets are associated with an analysis and can be identified as such. A result set associated with request 101 from an analysis named test is often referred to as .test.req101.

The table below illustrates the default names assigned to result sets and result set components, read from request (.req) and results (.res) files.

 

Result set type	Result set name	Component names	File that result is from
part	PARxxx...	x y z e1 e2 e3 e4 mag vx vy vz wx wy wz accx accy accz wdx wdy wdz	results file
diff	DIFxxx...	q dq	results file
joint	JOIxxx...	fx fy fz tx ty tz fmag tmag	results file
jprim	JPRxxx...	fx fy fz tx ty tz fmag tmag	results file
motion	MOTxxx...	fx fy fz tx ty tz fmag tmag	results file
gear	GEAxxx...	fx fy fz	results file
coupler	COUxxx...	fx1 fy1 fz1 tx1 ty1 tz1 fmag1 tmag1 fx2 fy2 fz2 tx2 ty2 tz2 fmag2 tmag2 fx3 fy3 fz3 tx3 ty3 tz3 fmag3 tmag3	results file
sforce	SFOxxx...	fx fy fz tx ty tz fmag tmag	results file
spring damp	SPRxxx...	fx fy fz tx ty tz fmag tmag	results file
bushing	BUSxxx...	fx fy fz tx ty tz fmag tmag	results file
beam	BEAxxx...	fx fy fz tx ty tz fmag tmag	results file
field	FIExxx...	fx fy fz tx ty tz fmag tmag	results file
user request	UREQxxx...	u1 u2 u3 u4 u5 u6 u7 u8	results file
request	REQxxx...	x y z r1 r2 r3 mag amag	request file
ucon	(not implemented)

2.

If the value for the “units” parameter is calculate, Adams/View tries to determine the units to use for this operation. For example, if velocities are added (length/time), then the calculated “units” parameter for the new result set component is velocity (length/time). If the derivative of a velocity is taken, the calculated “units” parameter is acceleration (length/time**2).

Adams/View can only handle calculated units with a maximum exponent for the base units (force, length, mass, time) of plus or minus four. For example, if a result set component with the units (length/time**3) is multiplied with a result set component having the same units, it gives the calculated units (length**2/time**6). Because the exponent of time is greater than four, Adams/View uses no_units and issues a warning.

Values are: no_units, calculate, length, angle, mass, density, time, area, volume, velocity, acceleration, angular_velocity, angular_acceleration, inertia, area_inertia, damping, stiffness, torsion_stiffness, torsion_damping, force, torque, pressure, force_time, torque_time.