STUDI KORELASI HAMBATAN DAN SEAKEEPING KAPAL TRIMARAN UNTUK DAERAH PERAIRAN MALUKU
Abstract
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 CFX-code dan penelitian tentang seakeeping dilakukan dengan teknik CFD (ANSYS AQWA).Hasil kajian melalui 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 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 yang diperolehdibandingkandenganpublished datadanmenunjukkankesesuaianhasil yang cukupbaik. Hasil penelitian ini diharapkan dapat memperkaya dan memperkuat database dalam mempresentasikan korelasi hambatan terhadap olah gerak pada lambung kapal trimaran dan selanjutnya dapat diaplikasikan secara langsung dalam perhitungan hambatan dan seakeeping yang digunakan pada tahap desain (preliminary design).
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