Desain dan Analisis Kehandalan Pipa Bawah Laut Pada Kondisi Instalasi Akibat Keacakan Tinggi Gelombang dan Kuat Leleh Baja
Jurnal Teknik Sipil
Abstrak Demi mencapai metoda distribusi migas yang efisien, pipa bawah laut harus didesain agar dapat memenuhi tujuan desain selama masa layan. Pada proses desain digunakan data deterministic berupa tinggi gelombang signifikan dan kuat leleh baja desain. Pada studi ini proses desain dilakukan sesuai dengan standar DNV OS F101 dan DNV RP E305 untuk pipa dengan diameter 32 inci. Abstract In order to achieve an efficient oil and gas distribution method, subsea pipelines must be designed to meet
... designed to meet design goals during service life. In term of design process, deterministic data used in form of significant wave height and steel yield strength. In this study, the design process carried out according to DNV OS F101 and DNV RP E305 standards for pipeline with 32 inches outer diameter. In actual conditions during the installation process, tensions applied along the pipeline as effect from random waves. Also the design value of design steel yield strength is a result from many random tensile test value of steel samples. Therefore, reliability analysis carried out using Monte Carlo simulation to determine the effect of random wave heights and steel yield strengths on the stress occurred along pipeline. Monte Carlo simulation are carried out as many as 100 simulations for each of three wave headings. In reliability analysis, pipeline is considered fail if the maximum total stress that occurs is greater or equal to its yield strength. Based on the simulation results, pipeline considered unreliable due to its reliability probability value which is lower than 0.998. pipa terhadap moda kegagalan internal overpressure, external overpressure, propagation buckling, dan combined loading.