Studi Karakteristik Hambatan Dan Seakeeping Kapal Trimaran Pada Perairan Tenang Dan Bergelombang

Luhulima, Richard Benny (2017) Studi Karakteristik Hambatan Dan Seakeeping Kapal Trimaran Pada Perairan Tenang Dan Bergelombang. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan lambung tunggal dan banyak untuk aplikasi kapal penumpang mengalami pasang surut dimana hal itu berkaitan dengan besarnya hambatan, stabilitas kapal, dan dinamika gerak kapal (seakeeping). Kapal lambung tunggal cenderung memiliki hambatan yang besar dan kurang stabil tetapi menunjukan kareteristik seakeeping yang sangat baik. Sementara itu, kapal lambung banyak (trimaran) mampu menghasilkan hambatan lebih kecil, lebih stabil kearah melintang, tetapi memiliki karateristik seakeeping yang kurang baik terutama bentuk katamaran pada perairan bergelombang (oblique waves). Penelitian ini bertujuan untuk memilih kapal lambung tiga (trimaran) yang optimal untuk perairan tenang dan bergelombang. Perairan Maluku termasuk tipikal perairan yang relatif tenang diantara pulau-pulau yang berdekatan dan sangat bergelombang untuk laut yang terbuka dan jarak antara pula-pulau yang cukup berjauhan. Penelitian difokuskan pada perhitungan hambatan dan dilanjutkan dengan perhitungan seakeeping untuk perairan tenang dan bergelombang. Penelitian tentang hambatan dilakukan dengan teknik CFD menggunakan CFXcode dan penelitian tentang seakeeping dilakukan dengan teknik CFD (ANSYS AQWA) dan pengujian model (eksperimental) di Laboratorium Hidrodinamika FTK-ITS. Hasil kajian melalui pengujian fisik dan numerik menunjukkan bahwa interferensi komponen hambatan pada lambung trimaran terhadap perubahan jarak antara lambung secara melintang (S/L). Semakin kecil jarak antara lambung trimaran (S/L) maka semakin besar hambatan dan interferensi/interaksi komponen hambatan yang terjadi. Kemudian korelasi yang terlihat antara hambatan dan seakeeping adalah adanya perbedaan karena adanya interferensi semakin besar iv interferensi maka gerakan heave dan pitch semakin berkurang. Namun inteferensi tidak mempengaruhi terhadap gerakan roll. Hasil analisa pengujian dan numerik menunjukkan bahwa pada S/L=0,4 menunjukkan hasil yang sangat baik untuk permorma hambatan dan seakeeping. Hasil-hasil didapat berupa besaran hambatan dan karateristik seakeeping dari moda kapal trimaran. Selanjutnya dibandingkan dengan published data yang verified dari berbagai referensi. Hasil penelitian ini diharapkan dapat memperkaya dan memperkuat data base dalam mempresentasikan korelasi hambatan terhadap olah gerak pada lambung kapal trimaran dan selanjutnya dapat diaplikasikan secara lansung dalam perhitungan hambatan dan seakeeping yang digunakan pada tahapan desain (preliminary design). ============================================================================================ The use of single hull and many applications for passenger ships have ups and downs where it is related to the resistance and propulsion of ships, the stability of the ship, and the ship motion dynamics (seakeeping). Single hull ships tend to have a huge resistance and less stable but showed excellent seakeeping characteristics. Meanwhile, the multiple hull of ship (trimaran) capable of producing a hitch and the driving force is smaller, more stable towards transverse, but has a characteristic, seakeeping poor especially catamarans in wavy waters shape (oblique waves). This study aims to select three ship hull (trimaran) is optimal for calm and wavy waters. Maluku waters including waters typically relatively calm among the islands adjacent and wavy for the open sea and also the distance between the islands are quite far apart. The study focused on the calculation of the resistance used data from previous studies, and continued with seakeeping calculations for calm waters and wavy. Research on resistance to do with the technique using CFX CFD-code and research on seakeeping done by using CFD (ANSYS AQWA) and testing model (experiment) in Hydrodynamic Laboratory of FTK-ITS. The study results through physical testing and numerical show that the interference component of a drag on the hull trimaran to changes in the distance between the hull transverse (S/L). The smaller the distance between the hull trimaran (S/L), the greater the obstacles and interference/interaction component of resistances that occur. Then correlation was seen between the resistance and seakeeping are any differences due to their greater interference interference then heave and pitch motions decreases. But the interference did not affect the roll motion. Experiment and numerical analysis results show that the S/L = 0.4 showed excellent results for permorma resistance and seakeeping. vi The results obtained in the form of massive obstacles and seakeeping characteristics of ships mode of trimaran. Furthermore, compared with the published data is verified from various references. The results of this study are expected to enrich and strengthen the correlation data base to present obstacles to navigation on a trimaran hull and can then be applied directly in the calculation of resistance and seakeeping used at the design phase (preliminary design).

Item Type: Thesis (Doctoral)
Additional Information: RDKe 623.822 Luh s
Uncontrolled Keywords: trimaran, resistance, seakeeping, CFD, pengujian
Subjects: V Naval Science > V Naval Science (General)
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions: Faculty of Marine Technology (MARTECH) > Marine Engineering > (S3) PhD Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 05 Jun 2017 04:41
Last Modified: 18 Dec 2017 02:12
URI: http://repository.its.ac.id/id/eprint/41488

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