OS-E: 4010 Connecting Rod of a Slider Crank
This example involves the shape optimization of the connecting rod of a slider crank.
Model Files
Before you begin, copy the file(s) used in this example to
your working directory.
Model Description
The mass of the connecting rod is to be minimized. Initial velocity is applied to the block of
the model. The stress of all connecting rod elements must be less than an allowable value.
Figure 1. Slider Crank
Figure 2. Four Design Variables
Figure 1. Slider Crank
Figure 2. Four Design Variables
Input decks for the design are as
follows.
SUBCASE 1
MBSIM = 1
INVEL = 2
DESSUB = 10
SPC = 10
$
BEGIN BULK
$
DESVAR 1 UPPER0.0 -1.0 2.0
DESVAR 2 LOWER0.0 -1.0 2.0
DESVAR 3LEFT_OUT0.0 -1.0 1.0
DESVAR 5RIGHT_OU0.0 -1.0 1.0
$
DRESP1 1 MASS MASS PSOLID 18
DRESP1 2 STRESS STRESS PSOLID SVM 18
$
DCONSTR 10 2 -100.E1 100.E1
DVGRID* 1 9925511 0 1.0
* -1.568286121E-02-3.884642199E-02-6.483015791E-10
:
:Results
The final design appears as shown below:
Figure 3. Optimum Design
Figure 3. Optimum Design