trim kapal

Trim Calculation

[ Referensi : Chapter 11 Parametric Design , Michael G. Parsons ] Input Data :

L

: panjang kapal ( Lpp )

[m]

B

: lebar kapal moulded

[m]

T

: sarat kapal

[m]

∇

: volume dispalsement

[m]

LCG : titik berat kapal terhadap midship

[m]

KG

[m]

: titik berat kapal terhdap keel

LCB : titik tekan bouyancy terhadap midship CM

[m]

: midship coefficient

CWP : waterplane coefficient Hidrostatic Properties :

KB

= titik tekan buoyancy terhadap keel

[m]

= ( KB/T ) . T KB/T KB/T = 0.90 0.90 – 0.30 0.30 CM – 0.1 CB [Chapter 11 Parametric Design ]  BMT = jarak antara titik tekan bauyancy terhadap titik metacenter secara melintang = IT / ∇ IT

= moment of inertia of waterplane waterplane relative to ship’s ship’s transverse axis axis

CI

= transverse inertia coefficient = IT / LB3 = 0.1216 CWP – 0.0410

⇒ IT

= CI . LB3

[ Chapter 11 Parametric Design ]  BML = jarak antara titik tekan bouyancy terhadap titik metacenter secara memanjang = IL / ∇ IL

= moment of inertia of waterplane waterplane relative to ship’s longitudinal longitudinal axis

CIL

= longitudinal inertia coefficient = IL / BL3 = 0.350 CWP2  – 0.405 CWP + 0.146

⇒ IL

= CIL . BL3

[ Chapter 11 Parametric Design ]  Trim :

Trim = T A – TF = ( LCG – LCB ).L / GML

[m]

GML = jarak antara titik berat dan titik metacenter secara memanjang = BML + KB – KG