CALCS BAS010
Winch Drum Analysis

NOTATION

Ddodiameter, drum, outer surface
Ddidiameter, drum, inner surface
Edyoung's modulus, drum
nudpoisson's ratio, drum
Dcdiameter, cable
Dcmdiameter, wrapped cable, maximum
Ecyoung's modulus, cable
nucpoisson's ratio, cable
Ninumber of intervals, cable build up
Pcline pull
Dcodiameter, cable, outer
fhstress, hoop

APPLICATION

Drum hoop compression due to multiple rope layers in tension

OUTPUT

Drum hoop stress for each additional rope layer

SEE ALSO

BAS020, PROC071, PROC073

THEORY

Dissertation by Peter Dietz, Faculty of Mechanical Engineering, University of Darmstadt 'A Procedure for Calculating Single & Multi-Layer Cable Wound Drums' 1971

GUIDANCE

Care should be exercised in choosing values for Ec & nu_c. The value of Ec must reflect the area and stiffness ratios of the multi-strand nominally circular section cable relative to a solid square encompassing the circle.

INPUT FORMAT

DAT010title
DrDdoTdEdEraErtnudnuranurt
DrDdoTdEdEr/3Er/10nur.3,3
LiPri
1Pri_1
jPri_j
nPri_n
ENDDAT

Project Example: 250t Heavy Lift Crane 2.9m Dia. Winch Drum with 9 Rope Layers

Input

DAT010
TITLEP3445257 D1270-S0610 MH Drum
DrDdoTdEdEraErtnudnuranurt
1029022.620702070/32070/10.3.3.3
LiPri
164.1
285.6
3107.2
4128.7
5150.3
6171.8
7193.4
8214.9
9236.5
ENDDAT

Output

OUT010141011 P3445257 D1270-S0610 MH Drum
DrDdoTdEdEraErtnudnuranurt
1029022.620706902070.30.30.3
LiPriPrfCfh
164.1-71.2551-0.26339
285.6-31.2021.8135-0.55777
3107.28.272.4908-0.87644
4128.747.0683.0664-1.2146
5150.385.5253.5639-1.5696
6171.8123.534.0004-1.9389
7193.4161.394.3877-2.3209
8214.9198.964.7351-2.7142
9236.5236.55.0492-3.1179
END010