performance simulation - part 4

8/10/2019 Performance Simulation - Part 4

1/57

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nece uatbeda ca/rutodalshs]5/b.ln

term

ht

/ - ,J

eKio

Cantilever

Beam

Exam

Preprocessing:

efining

he

problem

depth

=

10cm

width

-

5cm

load

=

10/ 000N

E

=

200

cpa

(s ee. I )

Theprobiemhat smodelleds a classic antiieveream:

theother

end

fixedat oneendanda vertical oadapplied

o

*

i{o

/

l

|+6

$=

zn+

/:

Th

beam

has h

ollowing

dimensions

nd

DroDerties

.r"roR'ANrNote.that

t is

he esponsibility

fthe

user

o ensure

hat

a consistent

etofunits

ar

usd

or

the

problem;

hus

making

ny

conversions

here ecessaryl

Begin

y

giving

:e

exampre

itle

In the'utility

menu

ar'serect

he'F

e

menu

nd

he

change

Title,

submenu.

lect'OK'

hen

one.

I9l.^""b.':1 :il,,y:

are

going

o

solve

will

bedeEned

ya

number

fvariables.

hese

may

beentered

oyon

ot two

apDroaches

I

Thequickest

ay

s

o

enter

hem

n the

ANsys

input

window

Move

our

mouse

o the

ower

halfofthe

window

nd

hen

eft

click

len

tlpe n

ea"l

oiifre

olti-*tg

lnes.

acl

one

s

completed

y

hitting

Enre

or

Rerurn.

ll lengths

re

given

;

;nr.

'-'"

length=2

0OO

dep h=100

nldth=50

xsecr=deprh*width

rnerr iaz= (r idth*deprh**3)

/ /12

Notice

hat

by

using

ariables

ike

this,

t is very

easy

o

set

up

a

paramet.ic

escription

fyour

2

Altenatively,

hese

adables

y

be entered

n

the

utility

menu

bar,/

?aramaters,/,scarar

i;,r:f l"::

",

1;::

^lhis

brings

p

aoialog

ox n

whicL

h"r" par.-J*,

*"

t" entered ote

i ,q

,wq

r'uJL

rre(

on

Accept

o

save

our

changes

efore ou

cl ick

on

,Close,.

T\e overal l eornetr)

s

defined

n

nNSyS

usilg

keyDoi1ts

hich

simply

peci$ ariousp-inc.po,

-oordlnoles

o

oLlrine

he

bodv

for

this

oeam ramp.e,

nese

eypolnrs

i l l

be he $o ends frhe

beaml

2/101

3 39

PN1


2/57

Cdtilever

BeamExanple

.

Start hePrepT reprocessor

y

seiectmg

preprocesso/

n

the

ANSYS

Main

Menu

.

From he

Preprocesso/ enu,

eiect

Create,

(ullder

he

-Modeline_'

ide)

.

fhen select eypoints

rorn

his'CreaLe

enu

.

Select n Active

CS...'on

he

Ke,?oints'

menuThispermits

ou

to defioe eypoiotsr

tbe

acdve

oordinate

ysrem.

.Inthewindowthatappears,enterkeypointnumber'l ' intheappropdatebox,andenterthex.y,z

coordinates:,0,0n heir ppropnareoxes.

l'{IcFAFpiy'

ro accepr

ha;

oL

have

yped.

.

Enler he-second

elpoint

by ryping

2,

and1e[gth,0,0

n

the heir

appropriate

oxes.

.

Clickon OK

ro indicare

har

1ou

are inished

nreringelpoints.

Y,or-r

ar now iist

the enlered

eypoints

o make

sure

you

have

done

his step

corlectly,

by selecting

'Utility

menuba

'List',4(e)?oints'.

There

are

wo optionshere;

selecting

eitler

one will

give

you

th*e

coordinatesfthe ke]?oints ou

haveenteredthese

re0,0

and20OO,O

inceength=2obo).'

To

plot

hse eypoints

n the

graphics

indo.w,

hereare

wo methods:

1. Enter he ollowing wo commandsANSYS

input

windo,r|

/pnum,

kp/

1

kpLot

The irst

ofthese ommands

urns

hekypoint

umbering

n

(assuming

hat

t'snot

already

n

and

hesecondommard lots

hekeypoints.

2. In

the

Utility

menu

ax', elect

Plotctrls,

enu,hen

Numbering...'

lickon he

button

eside

'Keypoint

umbers'o hat

t changes

olour,

nd ays'On'beside

t.

Clickon'OK'and

he

box

will close

nd hekeypoinls

,ill

be

plotted

ith hek

numbers.

for

his

exampl,

he irst

one

may ehidden

n he riad

ymbol

t 0,0,0.)

o replot

t anyime,

select

Utility

menu

ba/,rylot'/replot'.

You

mustnowconnect

he wo

keypoints

ogether

o forma line

.

li$t close

he astmenu

hat

were

used

o create

hekeypoiots

y

double licking

n

theupper

left-hand orner

fthe menu.

This

will return

ou

o

the reate

menu,.

.

Selecthe

Lines'

tem

under

-Lilles-,)n

thisE]enu.

.

Select

Straight ine'.

.

Use

he

mouseo

piak

he

\ro ke)?oints

n

the

graphics

illdow.

Theywill

bemarked

y a small

yeiiow

boxwhenpicked.

Click

on

OK'

in

the

Create traight

ioe,window

when ou

hive

picked

he wo

keypoints

. Now closehe Lines' nd Create' enus searlier escribed.

o

It is

nownecessary

o create

ome

lements,a/n

his ine.This

s called

Meshtrg'.

ANSYS

irstneedso

know

whatkind

ofelmentso

use

or our

problem:

.

Select'Elementype'in

he

?reprocessoi

menu.

.

Select

AddEdit/De1ete.

'

.

Click n he'Add...'button

n

the,Element

yoes,window

.

Select 'Bearn ' , '2Delast ic 'andcl ickon'OK,youshouldsee,TypetBEAM3,inthe,Element

Typeswindow.

.

Click

on

Optioos

'

. In the'BEAM3elementypeoptions,window,lickon he

op

button

K6),

and

select

Include

Output'.

.

Click

on

OK'

.

Click

on'Close'in

he

Element

Tvoes'vr'indor

.

htrp://vsv.nece.ualb.rt .cttuto.ialvdsys/bab,6am.htn

2/nA13:39

M


3/57

http:/

w

mec. ualberr.ca_/tutotd/dsysileam//bern

hrr

.

.

Ciose he

Element

ype'

menu.

YoLl

need

o speci4' eometric

roperties

or your

elements

.

Select

Real

Conslants...'jn

he

?reprocessoi

menu.

.

Cl ick

n Add.. '

.

Select

Type

1 BEAM3,

and

click

on OK'.

.Inthe'RealConstantsforBEAM3,window,enterthefouowinggeometricproperties(using

paramerersharwereenreredr hebeginringfour

example).

AREA:

XSECT

IZZ.

inert iaz

HEIGHT:

depth

.

Clickon

OK

.

Clickon

Ciose,n the

Real

Constants'

indow.

You

hen

eed

o sirecify

arerialropenies:

.

Select'Material

rops,inhe preprocessor'enu..

Select'Isotropic

,under

-ConstantJ

.

Click

OK'

n the

Isotropic

aterial

roperties,

window

o select

aterial

umber

.

.

In the

rindow

hat

appears,

here

reminy

properties

hat

may

be

specfiea.

he

ones

f

concem

re:

X:

200000

NUXY:0,3

.

Set hese

ropefties

nd

click

on,OK,.

.

Closehe

Material

rops,menu.

Jhe

as]

-s19P

e&Ie,I119_shi gsto tellANSYS owbig heelements

hould

e.Let,s

make

heelement

length Ocm

o

begin

with;

.

Select'Shape

Size'under

Meshing_,in

the

preprocessor,enu.

.

In the

Shape-&5ize'-rhenu.

elect

Giobal

Etem

Size

.

'-{.n

S-

c.,,&a

/Gld.-

- -

r^p

.

Give

a'SIZE

of2OO

nd

click

onOK

d

.

Closehe

Shaoe*-Si-zd

menu.

Y.zr- o"t{-

Now

you

can

eli

AliSyS

to mesh

he

beam:

.

Selecr

Mesh'

nder

-Meshing- n the

preprocessoi

menu.

Selecr'Lines'

n rhe

Mesh'

menu.

.

Use he

mouse

o

pick

the

ine n

the

graphics

indow.

t

wilj

whenpicked.

.

Click

on'OK

n

rhe,Mesh

ines

Bor

.

Close

he

Mesh,

menu

Plot

your

elements

y

.

SelectNumbering,

n

the

plotctrls,

Menu.

.

Turn

off

Keypo:nr

umbering

o har

he

plor

does

o,

become

onirsins

.

LllcK r tne tem & Arrrjb umberingox.and elecrlemertnumber

.

Click

on

OK,

.

From

he

Plot'

menu,

elect

Elements

and

you

will

then

see

he

eiements

lotted

n

multiple

colours,

ith

their

element

umbers

be

surrounded

y

a

yellow

box

2/5/01

:39 M


4/57

Codt

.ver

E@

Exhple

hltp:/ hv.mece.ualbeda

ca/tutodats/ets,/bm/b.sn

hh

i*i-1f

of ,n.

r".ults

will

begiven

by node,t would

be a

good

dea

o look at how

he nodes

re

.

Selectlumbedng'

rom

he

plotctrls,

menu, nd

um on

node

numbedng.

.ou

will

see hat

he

plot

becomes

erycluttered

ith

numoers.

.

To see

henodes

ndnode

numbers lotted

y hemselves,

elect

Nodes'

from

he

p1ot,

menuandyouwill beableo seehow henodes renumbered.otice

hat

hey

arenot

necessa.lly

numbered

rom

eft

o right.

Save

he

model

at his

ime,so

fyou

make

omemistakes

ater

on, you

wili

be able

o come

ack

o

l1ns

omt;

.

Select

UtilityMenuBarTFile'/,Save

s

..

.

At

the op.

f the

window

hat appears,.ou

wlll

see

.

db,

preceeded

y a directory

ame.

Change

the

I

to

whatever

ame

ou

want,

say

modeli,so

that

he

box now

contains

modell.db,

preceeded-by

fuli directory

ame.

The

db s mportant,

o

make

sure

ou

nclude

t.)

.

Click

on'OK'.

You have

now

defined our

model.

t is now

ime o

apply he

oad(s)

nd

constraint(s)

nd

solve

he

the resulting

ystem

fquations.

Solution

Phase:

ssigning

oads

and

Solving

close

he

Preprocessor'

enu

and

openup

h'solution

menu

Iiom

the

same

ANSyS

Main

Menu,).

First.you.must

eli

ANSYShow you

want

t to

solve his

problem

Select

New

Analysis,

ndensure

tl9

llgj9.il fgl-aTdr,and

)ick'OK,;.e.youaregoing

;

do astaticanatysis

n hi

beam

sapposed

to ri djiianiic

-anaiysiir,

Toi

example.

Now

you

must

apply

omeoads

andconsfaints:

.

Select

Appiy

nder'-Loads-

ir lr

.

We

will stad

with

constraints,

o select

Displacemellt

>'

.

Select'On

odes,

.

Use.themouse

o

pick

he

node

at 0,0 n

the

graphics

indow.

.

Click

on

OK' n the

ApptyU,ROT,window.

.

Choose

hat

deglees

ffreedom

are

o beconstrained.

n this case,

ou

havea calti]everedbeam, oallDOI,Sare

constrained

t hisend

.

Select'All

DOI'

andclick

on,OK'. you

will

see,some

riangles

n the

graphics

indow

indicaring

heconrraints.

he otation

onrraint

s marked

riorange.

n"d

le displacernenr

constraints

re n

b1ue. ou

maynot

beable o

see he

otation

o-nstraint

ecause

fthe

angle f

Let'sget

a better

ook

at he

situation

efore

we apply

oad:

.

fLrrn

ffrhe

ode

"rnbering

Urility

men._r

ar

plorCrr

s,'Numberins

.

P

ot th_e

lemenrs

''Utilily

menu

bar

pior|tiemenl

s,)

.

we

wttl otate

hepictureo an sometric iew:Select'Utilitymenu a

,plotctrlsy?an,

Zoom,

l::l:i

-,ti,]n",*"09w

that

appears,

ou

havemany.controls.

ry

experimenting

ith

hem.By

lurnng

on he

dynamic

ode click

on he

button

beside

D;,namic

Mode,

o hat-it

urns

eilowj

you

can

use

he

mouse

o

drag he

mage,ranslating

nd otating

t

on ali

hree

axes


5/57


6/57

Cerilever Bed

Exanpic

htlp//w

nec

ualbfa..ttubiah/anryvtaD/bean.r@

.

Select'List esults'

n

herceneral

ostprocessor'eflu.

_

.

Select'SortNodes...'

.

Set

ORDER'

o

'Ascendirg

Order'

.

Leave

N{JMB'blank.

.

In the eftmost

fthe lists

beside

Item,Comp'elect

geometry,.

.

In

the

ght

ist

select.{ode

oc X'.

.

Click

on

OK'.

.( \

\ iJ. l

. " \

z

.{q

.

Select

Ngd4_:&ELon...'

iom

he'ceneral

ostprocesso/

menu.

.

Choose-66F

oEii6n' nd

Atl

DOFs'rom

h; Lstsn

the

List

Nodal

Solurion

indow.

"

$.'i

"',1"

"1

",

I

^

You

will

noticen

the egend

n thegraphics

indorvhat here s

t he

text'DSCA-)24

tlt: ;;

,"

the

displaceflent

caling

n other

words,

hedisplace.nents

n

the igure

ook 12. times arger

han

they

lgaily

are.You can

adjust

he

displacement

calingby selecting

Utility Menu

Ba//'PlotCtrls7'SMeTDisplacement

caling...'.

You

probably

ant o know

Lhe

crual

i>piacements

frhebeam

. Closehe PlotResults'menu.

.

Ciick

n

OK.

Howdo hese

umbers ompare

ith

expected

nalltical

esults?

Thenodalesults

ill bedisplayed.

ode2 will

bedisplayed

fter

& 3- i.

This

ANSYS

umbershe

nodes. ode

2 is

at heend

fthebeam

at

x=2000).

fvou

nodes

efore ispiaying

henodal

olulion,

he esufts ould

ivebeen

isolaved

I

-

11,

which

oes or

correspond

o rhe

actual

hysical

ocation

frhenodis.

S

'

,p\ o-c

'

"^".'

. \

\


7/57


8/57

p-,vrat4-

IF

UeeDeflne

able>Add

UnderLab box,enter

endings nd ype

s,3under

election

CloseElementable

datawindow

List

elem able and click

on bendings

Note

the

results

ANY

COMMENTS???


36/57

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performance simulation - part 4

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