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 : titik berat kapal terhdap keel [ m ]

LCB : titik tekan bouyancy terhadap midship [ m ]

CM : midship coefficient

CWP : waterplane coefficient

Hidrostatic Properties :

KB = titik tekan buoyancy terhadap keel [ m ]

= ( KB/T ) . T

KB/T = 0.90 – 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 relative to ship’s transverse 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 relative to ship’s 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 = TA – TF

= ( LCG – LCB ).L / GML [ m ]

GML = jarak antara titik berat dan titik metacenter secara memanjang

= BML + KB – KG