Comparison between x1x1 system (MF04-221-01R0) and x1x2 (MF04-221-02R0) No x1x1 Option (MF04-221-01R0) x1x2 Option (MF04-221-02R0) 1 Minimum Required Concrete A x1x1 system required less minimum concrete height. In this case, min. required concrete height = 7300mm if top elevation is fix at +9.00,

bulgefetaUrban and Civil

Nov 29, 2013 (3 years and 6 months ago)

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Comparison between x1x1 system (MF04
-
221
-
01R0) and x1x2 (MF04
-
221
-
02R0)


No

x1x1 Option (MF04
-
221
-
01R0)

x1x2 Option (MF04
-
221
-
02R0)

1

Minimum Required Concrete

A x1x1 system required less minimum
concrete height. In this case, min.
required concrete heig
ht = 7300mm if
top elevation is fix at +9.00,

Minimum Required Concrete

A x1x2 system required much more
minimum concrete height. In this case,
min. required concrete height = 8325mm
if top elevation is fix at +9.00,


2

Performance of fender

Normal Comp
ression

Energy absorption = 1,750.84 kN
-
m

Reaction force = 2,345.25 kN

10° Horizontal Compression

(Berthing angle)

Energy absorption = 1,545.99 kN
-
m

Reaction force = 2,345.25 kN

5° Vertical Compression (Flare)

Energy absorption = 1,663.30 kN
-
m

Reaction fo
rce = 2,345.25 kN

Hence, with similar energy absorption,
the reaction force of x1x1 system is
lower.

Performance of fender

Normal Compression

Energy absorption = 1,837.64 kN
-
m

Reaction force = 2,616.12 kN

10° Horizontal Compression

(Berthing angle)

Energy

absorption = 1,622.64 kN
-
m

Reaction force = 2,616.12 kN

5° Vertical Compression (Flare)

Energy absorption = 1,520.87 kN
-
m

Reaction force = 2,616.12 kN

With similar energy absorption, the
reaction force of x1x2 system is higher.



No

x1x1 Option (MF04
-
22
1
-
01R0)

x1x2 Option (MF04
-
221
-
02R0)

3

Cost of frame

Due to the lower reaction force and
moment on frame, weight of frame is
much lighter (2218 kg)

Cost of frame

Due to the higher reaction force and
moment on frame, weight of frame is
much heavier (4028 kg
)

4

Installation & Maintenance

Easier as it involves on 1 fender body

Installation & Maintenance

Tougher as it involves on 2 fender bodies


Why the energy absorption of a x1x2 system reduce much more than a x1x1 system
during 5° vertical compression (Fla
re)?


No

x1x1 Option (MF04
-
221
-
01R0)

x1x2 Option (MF04
-
221
-
02R0)

1

During 5° vertical compression from
flare, fender is compressed to the
maximum where energy absorption
=1,663.30 kN
-
m due to angular reduction
factor.


During 5° vertical compression fro
m flare, top
fender is compressed to the maximum but due
to the pitch of the fenders, lower fender is
compressed by lesser. Therefore, energy
absorption during 5° flare = 1,520.87 kN
-
m
which is much less than the total energy
absorption of each individual
fender under 5°
reduction factor.