Tiêu Chuẩn Iso 06003-1984 Scan.pdf

3 UDC m 363 2 531 Xl 3 531 231 Ref No I S060034984 (El International Standard 6003 I NTERNATIONAL ORGANIZATION FOR STANDARDIZATI~E~YH~~HAR OWAHWAUHR n0 CTAHL1 APTH3AUH~RGANISATlON INTERNATIONALE DE NO[.]

3

IS0 (h Internatio al Organizatio for Standardizatio ) is a worldwid fe eratio of

F inla nd

Ja pa n

@ Interna tiona l O rga niza tion for Sta nda rdiza tion, 194

Printed in S itzerla nd

Alpine skis - Determina tion of mass and p ola r moment

NOT - The a pproria te ski len th sould b giv en with the publsed

It is

q al ity o f th ski

2 il for th fixatio of fiame ts B T he p late C s all be fixd o

its c nte o f grav ity

4.2

at least 0, s

p ub lis e :

d v ic s all b e p lace in this a t o ph re for at least 24 h b efore

mea sureme t

6 Calbr atio n o f me as rin de vic e

t hat th c e nte o f gravity mark is in th c entr e of th ho le o f th

bet e en th two fiame nts B (se e th f ig r e)

D ifere nc e s in c o nstuc tio n betwe en th dif f er ent me asurin

de viate fom th theo r etic al ac c urate value o f th po lar mome t

of inertia

Let th ski c me to rest s spe nde d in th de vic e Elminate any

swin in m io n It is impo rtant that th test ar ea be f r ee of air

mov eme t, as this afe c ts te st acuracy

de te rmine a c o rrec tio n fac to r c f o r e ac h meas rin de vic e , to

c o rre c t th meas re d dat a an imp ro v e r e pro duc i lty

With th hand , r o t ate th ski ho rizo ntaly ao ut its axis o f grav-

ity Lter al displace me nt o f th c e nte of gravity ex c e e din

m ely 2 5 O

The c o rre c tio n fac to r is de te r mined fo m t he r atio o f t he

c alc ulate d po lar mome t o f iner tia t o th me asure d po lar mo-

me t o f iner tia o f a br of ste e l with dime sio s 0 ,l cm x 2 cm

x 170 cm

t he pe r pe ndic ular axis thr oug t he c ente of gravity The time

requir ed f o r th ski to co mp lete five ccle is r e c o rded with th

sto p w c h (4.3 ) The time, T, f o r 1 o sc ilatio n is dete rmine d b y The theo retic al

fo rmula

po lar mome t of inertia, Jth, is

c alc ulate d b y th

I

th =

~-

12

rec o rded time

T=

5

whe re

b is th width o f th br in m re s;

tio n f ac to r , c , c an be

de te rmine d b y

value th c o rre c -

I

th

c =-

I

The po la r mome t of inertia, I ex pre ss d

s uar ed, is give n b y th form ula

whe re

is th theo r etic al polar mome t o f iner tia;

I is th me asure d po lar mome t of iner tia

This fac to r s o uld fal within a r an e o f 0,9 an 1 ,

whe re

If his fac to r le s o utside o f this r an e, th te st equipme nt s al

natio nal S tan ard

T is th per iod o f o sc ilatio n, in se co nd ;

m

a ny

anc ilary prs,

t h

in

e finis ed

kio rams

ac c e leratio n d e to gravity , in mete

Per

se co nd

df

is th half distanc e be t ee n

th t o p plate, in m re ;

Place th ski o n th fulc rum (4.21, to de te rmine t he c ente o f

cro s sig

is th length o f th fiame nts, in mete

2

B Fia me ts

/

I I

I

1

I! d

C ente of grav ity

Fia me ts

Hole to lo ate th c nte of grav ity

displa ceme t 5 ”

3

9 To le r anc e s

ma ss :

+ 0 ,02 k

If d ata ar e publise d b y th man fac turer with r e f erenc e to this

o bse rve d :

po lar mome t of iner tia:

+ 10%

The te st repo r t s al inc lu e th fo llo win info rmatio n:

a)

b)

c l

d)

e )

r ef e r enc e to this Inter natio nal S tan ar d;

name o f t he man fac tur e r;

mo del desig atio n;

no minal length;

ex planatio n o f th reaso n

f or th deviatio n

nar d with an

T his p ge intentionally le ft blank