?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=MODEL+TENSION+LEG+PLATFORM+2-DOF+(TWO+DEGREE+OF+FREEDOM)%0D%0AYANG+LEBIH+STABIL+TERHADAP+GANGGUAN+OMBAK&rft.creator=NURYANTO%2C+1515021046&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Tension+Leg+Platform+(TLP)+is+an+offshore+platform+structure+that+floats+due%0D%0Ato+buoyancy+that+is+greater+than+the+overall+weight+of+the+structure.+TLP+is%0D%0Agenerally+used+for+oil+and+gas+drilling+(exploration)+activities.+The+TLP+structure%0D%0Aconsists+of+a+deck%2C+a+pontoon%2C+tendon+ropes+and+a+foundation.+In+the+existing+TLP%0D%0Amodel%2C+the+deck+and+pontoon+is+a+rigid+body+with+structures+characteristics+that+do%0D%0Anot+stand+waves+(flows+with+the+direction+of+the+waves)+so+that+the+structure%0D%0Avibrates+which+damages+the+structure+and+drilling+equipments.%0D%0AIn+this+research%2C+a+new+TLP+model+(laboratory+scale)+was+designed+with+a%0D%0Aseparation+between+the+deck+and+the+pontoon+that+connected+by+springs+so+that+the%0D%0Astructure+is+more+flexible.+This+separation+method+is+known+as+the+two-degree+of%0D%0Afreedom+system+(2-DOF)+which+is+developed+into+the+dynamic+damping+system%0D%0A(Dynamic+Vibration+absorber+%2F+DVA).+With+the+DVA+method%2C+design+parameters%0D%0Acan+be+optimized+so+that+the+disturbance+of+the+water+wave+is+completely+muted+by%0D%0Athe+mass+of+the+immersed+ponton.%0D%0AThe+results+of+research+showed+that+the+best+solution+for+the+new+TLP+model%0D%0A(TLP+2-DOF)+that+was+able+to+reduce+the+dynamic+response+was+the+deck%3A%0D%0Apontoon+mass+ratio+of+1%3A+3+(0.3+kg%3A+0.9+kg)+and+spring+constant+34%2C3808+N%2Fm.+At%0D%0Awater+frequency+disturbance+of+1.55+hz+and+1.74+hz%2C+the+TLP+2-DOF+model+is+able%0D%0Ato+reduce+vibrations+on+the+deck+up+to+57%25+in+the+horizontal+direction+(surge)+as%0D%0Aevidenced+by+numerical+simulations+using+ANSYS.+On+the+experimental+results%0D%0Athe+TLP+2-DOF+model+were+able+to+reduce+deck+vibrations+up+to+18.59%25+at+1.55%0D%0Ahz+water+frequency+and+21.96%25+at+1.74+hz+water+frequency.+The+difference+of%0D%0Anumerical+simulation+and+experimental+values+was+caused+by+different+conditions%0D%0A%0D%0Aii%0D%0A%0D%0Awhere+the+interference+force+numerical+simulation+is+assumed+to+be+stable+while+in%0D%0Athe+experimental+tests+the+interference+force+originating+from+the+waves+is%0D%0Arelatively+unstable.%0D%0A%0D%0AKeywords+%3A+2-DOF+system%2C+Deck%2C+Dynamic+Vibration+Absorber%2C+Foundation%2C%0D%0A%0D%0APonton%2C+Surge%2C+Tendon%2C+Tension+Leg+Platform.%0D%0ATension+Leg+Platform+(TLP)+merupakan+struktur+anjungan+lepas+pantai+yang%0D%0Amengapung+akibat+gaya+apung+yang+lebih+besar+daripada+berat+keseluruhan%0D%0Astruktur.+TLP+umumnya+digunakan+untuk+kegiatan+pengeboran+(eksplorasi)%0D%0Aminyak+dan+gas.+Struktur+TLP+terdiri+dari+deck%2C+ponton%2C+tali+tendon+dan+fondasi.%0D%0APada+model+TLP+yang+sekarang+(existing)+antara+deck+dan+ponton+menjadi+satu%0D%0Akesatuan+(rigid+body)+dengan+karakteristik+struktur+yang+tidak+menahan%0D%0Agelombang+(mengikuti+arah+gelombang)+sehingga+keadaan+struktur+bergetar+yang%0D%0Aberpotensi+merusak+struktur+dan+peralatan+pengeboran.%0D%0APada+penelitian+ini+dirancang+model+TLP+baru+(skala+laboratorium)+dengan%0D%0Apemisahan+antara+deck+dan+ponton+yang+dihubungkan+dengan+pegas+sehingga%0D%0Astrukturnya+lebih+fleksibel.+Metode+pemisahan+ini+dikenal+dengan+sistem+dua%0D%0Aderajat+kebebasan+(2-DOF)+yang+dikembangkan+menjadi+sistem+peredam+dinamik%0D%0A(Dynamic+Vibration+Absorber%2FDVA).+Dengan+metode+DVA+parameter-parameter%0D%0Arancangan+bisa+dioptimalisasi+sehingga+gangguan+gelombang+air+sepenuhnya%0D%0Adiredam+oleh+massa+ponton+yang+terbenam.%0D%0AHasil+penelitian+menunjukkan+bahwa+solusi+terbaik+untuk+model+TLP+baru%0D%0A(TLP+2-DOF)+yang+mampu+meredam+respon+dinamik+adalah+rasio+massa+deck+%3A%0D%0Amassa+ponton+sebesar+1%3A3+(0%2C3+kg+%3A+0%2C9+kg)+dan+konstanta+pegas+34%2C3808+N%2Fm.%0D%0APada+frekuensi+gangguan+air+1%2C55+hz+dan+1%2C74+hz+model+TLP+2-DOF+ini+mampu%0D%0Amereduksi+getaran+pada+deck+hingga+57%25+pada+arah+horizontal+(surge)+yang%0D%0Adibuktikan+melalui+simulasi+numerik+menggunakan+ANSYS.+Sedangkan+pada%0D%0Ahasil+pengujian+eksperimen+model+TLP+2-DOF+mampu+meredam+getaran+deck%0D%0Ahingga+18%2C59+%25+pada+frekuensi+air+1%2C55+hz+dan+21%2C96+%25+pada+frekuensi+air+1%2C74+hz.%0D%0A%0D%0Aiv%0D%0A%0D%0APerbedaan+nilai+simulasi+numerik+dan+eksperimen+ini+dikarenakan+kondisi+yang%0D%0Aberbeda+dimana+pada+simulasi+numerik+gaya+gangguan+diasumsikan+stabil%0D%0Asedangkan+pada+pengujian+eksperimen+gaya+gangguan+yang+berasal+dari+ombak%0D%0Arelatif+tidak+stabil.%0D%0A%0D%0AKata+kunci+%3A+2-DOF+system%2C+Deck%2C+Dynamic+Vibration+Absorber%2C+Fondasi%2C%0D%0A%0D%0APonton%2C+Surge%2C+Tendon%2C+Tension+Leg+Platform.&rft.publisher=FAKULTAS+TEKNIK&rft.date=2019&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F57040%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.uni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