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/DRESP1

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Optimization Keyword

/DRESP1 – Optimization Design Response

Description

Defines a response or a set of responses that are a result of a design analysis iteration. These responses can be used to drive the optimization process and are a measure of how a model performs under a set of constraints, boundary conditions and loading. They can be used as a design objective or as design constraints.

Format

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

/DRESP1/resp_ID

title

RTYPE

PTYPE

REGION

ATTA

ATTB

ATTI

ATTJ

 

 

 
hmtoggle_plus1Flag Definition

Field

Contents

resp_ID

Design response identifier.

(Integer > 0)

title

Title.

(Character, maximum 100 characters)

RTYPE

Response type for an optimization run.

(Integer > 0)

= 1: Mass

= 2: Fraction of mass

= 3: Volume

= 4: Fraction of design volume

= 5: Displacement

= 6: Stress

= 7: Strain

= 8: Internal strain energy

= 9: Velocity

PTYPE

Entity type for the definition of the optimization response.

(Integer > 0 or blank)

= 1: Node

= 2: Element

= 3: Part

PTYPE can be blank only when RTYPE=1, 2, 3, 4 or 8, which implies that the response is defined on the entire model.

REGION

Region identifier.

Default = 0  (Integer > 0)

ATTA

Attributes of a response where further definition is required (Comment 1).

Default = 0  (Integer > 0)

ATTB

Attributes of a response where further definition is required (Comment 1).

Default = 0  (Integer > 0)

ATTI

Identification number of a group of entities for which the response is defined.

(Integer > 0 or blank)

If PTYPE = 1: node group identifier

If PTYPE = 2: element group identifier

If PTYPE = 3: part group identifier

ATTJ

Additional definition of the entity type (only needed when PTYPE=2)

(Integer > 0 or blank)

= 101: BEAM element

= 102: TRUSS element

= 103: SPRING element

= 201: SHELL element

= 202: SH3N element

= 301: BRICK element
hmtoggle_plus1Example

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/DRESP1/1      

Response is mass summary of part group ID 2000329

### RTYPE=1: Mass

### PTYPE=3: Part

### ATTB=1 : SUM (summary)

### ATTI=2000329 : 2000329 is part group identifier due to PTYPE = 3

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#    RTYPE     PTYPE    REGION      ATTA      ATTB      ATTI

         1         3                             2   2000329

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|  

/DRESP1/2      

Response is Y translational displacement of node group ID 2021524

### RTYPE=5: Displacement

### PTYPE=1: Node

### ATTA=2 : Displacement component of Translational Y

### ATTI=2021524 : 2021524 is node group identifier due to PTYPE = 1

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#    RTYPE     PTYPE    REGION      ATTA      ATTB      ATTI

         5         1                   2             2021524

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

hmtoggle_plus1Comments
1.

Response type (RTYPE)

Entity type (PTYPE)

ATTA

ATTB

Mass (1)

Part (3) or blank

-

=2: SUM

Or blank

Fraction of mass (2)

Part (3) or blank

-

=1: COMB

=2: SUM

Or blank

Volume (3)

Part (3) or blank

-

=2: SUM

Or blank

Fraction of design volume (4)

Part (3) or blank

-

=1: COMB

=2: SUM

Or blank

Displacement (5)

Node (1)

Displacement component code

(Comment 2)

-

Stress (6)

Element (2), Part (3)

Stress item code

(Comment 3)

>0: Cluster size

Or blank

Strain (7)

Element (2), Part (3)

Strain item code

-

Internal strain energy (8)

Part (3) or blank

-

=2: SUB

Or blank

Velocity (9)

Node (1)

Velocity component code
(Comment 2)

 
2.ATTA for Displacement and Velocity component code.

ATTA value

Displacement component

1

Translational X

2

Translational Y

3

Translational Z

4

Rotational X

5

Rotational Y

6

Rotational Z

7

Total displacement

8

Total rotation
3.ATTA for stress/strain item code.

TRUSS elements:

ATTA value

Stress/Strain Item

0 or blank

Both ends

1

End A

2

End B

Beam elements:

ATTA value

Stress/Strain Item

0 or blank

All stresses/strains

4

End A pt. C

5

End A pt. D

6

End A pt. E

7

End A pt. F

104

End B pt. C

105

End B pt. D

106

End B pt. E

107

End B pt. F

8

Max end A

108

Max end B

All Solid elements:

ATTA value

Stress/Strain Item

13

von Mises

101*

Max Principal Stress

8

Major Principal

16

Mid Principal

22

Minor Principal

6

Normal X

14

Normal Y

20

Normal Z

7

Shear XY

15

Shear YZ

21

Shear XZ

102*

Equivalent Plastic Strain
(for strain response only)

All Shell elements:

ATTA value

Stress/Strain Item

101*

von Mises
both surfaces

102*

Major Principal
both surfaces

9

von Mises 1

17

von Mises 2

7

Major Principal 1

15

Major Principal 2

103*

Minor Principal
both surfaces

8

Minor Principal 1

16

Minor Principal 2

104*

Normal X
both surfaces

3

Normal X 1

11

Normal X 2

105*

Normal Y
both surfaces

4

Normal Y 1

12

Normal Y 2

106*

Shear XY
both surfaces

5

Shear XY 1

13

Shear XY 2

107*

Equivalent Plastic Strain
both surfaces

108*

Equivalent Plastic
Strain 1

109*

Equivalent Plastic
Strain 2

Note: ATTA values marked with an asterisk (*) are not consistent with OptiStruct.

See Also:

Design Optimization

Example 51 - Optimization in RADIOSS for B-Pillar

DRESP1