Article Per Year (5 Year)
p-Index From 2020 - 2025
0.751
P-Index
This Author published in this journals
All Journal Teknik Sipil dan Arsitektur JURNAL CRANKSHAFT Jurnal Abdi: Media Pengabdian Kepada Masyarakat Jurnal Teknik Sipil dan Arsitektur
Rofiyantama, Dega
Unknown Affiliation
Humanities Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Studi Teoritis Kinerja Propeller Mesin Pesawat tanpa Awak (UAV) dengan Variasi Pitch Propeller untuk Optimalisasi Gaya Thrust Faishal, Afif; Aklis, Nur; Wibowo, Ari Mukti; Harjanto, Furqaan; Supriyanto, Agung; Pambudi, Hafizt Bagus; Fadhlan, Muhammad; Rofiyantama, Dega
JURNAL CRANKSHAFT Vol 7, No 4 (2024): Jurnal Crankshaft Vol.7 No.4 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v7i4.13933

Abstract

Kinerja pesawat tanpa awak atau unmanned aerial vehicle (UAV) sangat dipengaruhi oleh gaya dorong propeller, yang secara langsung memengaruhi daya angkat pesawat di udara. Gaya dorong propeller pada UAV ini dikenal juga dengan gaya thrust. Berbagai faktor, seperti dimensi, desain propeller, daya mesin UAV, dan kondisi pengoperasian, memengaruhi gaya thrust yang dihasilkan. Oleh karena itu, penelitian dengan membandingkan kinerja propeller sangat penting untuk mengetahui gaya thrust terbaik yang mampu dicapai. Penelitian ini dilakukan untuk menganalisis kinerja propeller dengan perhitungan teoritis pada variasi pitch propeller 7, 8, 9, 10, 11, 12 (Inch) dengan diameter propeller 16 Inch. Perhitungan teoritis didasarkan pada konsep gaya dan perubahan momentum fluida yang melewati propeller. Perhitungan teoritis tersebut divalidasi oleh eksperimen pengujian thrust dengan metode Ground Test pada propeller 16x10 (Diameter x Pitch Propeller) untuk mengetahui kesesuaian perhitungan teoritis dengan eksperimen. Eksperimen dilakukan pada rangkaian uji thrust  dengan mesin UAV pada variasi putaran mesin 2000, 3000, 4000, 5000, 6000, 7000 (Rpm). Validasi ini berguna untuk memastikan bahwa model perhitungan yang digunakan dapat merepresentasikan kondisi nyata di lapangan. Hasil penelitian menunjukkan bahwa thrust tertinggi dihasilkan pada propeller dengan pitch 12 inch dengan putaran mesin 7000 Rpm, yaitu sebesar 5,1358 Kgf. Data keseluruhan menjelaskan bahwa pada peningkatan pitch propeller dan putaran mesin menunjukkan adanya kenaikan gaya thrust yang dihasilkan. Pitch propeller dapat berpengaruh terhadap thrust yang dihasilkan karena mampu meningkatkan sudut serang setiap bilah terhadap aliran udara. Sudut serang yang lebih besar ini memungkinkan propeller memindahkan lebih banyak udara dalam setiap putaran. Demikian juga dengan putaran mesin yang meningkat akan memperkuat dorongan setiap propeller terhadap udara sekeliling yang dilaluinya.
KOMPARASI ANALISIS BANGUNAN PENGAMAN LERENG MENGGUNAKAN METODE LOAD RESISTANCE FACTOR DESIGN DAN ALLOWABLE STRESS DESIGN Harjanto, Furqaan; Rofiyantama, Dega; Maharani, Mentari Putri
Jurnal Teknik Sipil dan Arsitektur Vol 30 No 1 (2025): JURNAL TEKNIK SIPIL DAN ARSITEKTUR
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v30i1.4366

Abstract

Retaining walls are important structures in civil construction used to resist soil and water pressure. Two common methods used for retaining wall analysis are the Load and Resistance Factor Design (LRFD) and Allowable Stress Design (ASD) methods. LRFD is based on the principle of probabilistic balance and considers an explicit safety factor to ensure that the capacity of the structure is greater than the loads that may occur, while ASD is based on the principle that the stresses acting on the structure should not exceed the allowable stresses for the material and is simpler than the LRFD method, but does not consider the safety factor explicitly and does not account for uncertainties in materials, loads and analysis. With the different approaches in LRFD and ASD analysis, this study aims to compare the analysis results with LRFD and ASD approaches in the case of a secant pile-type retaining wall on the slope of river X where the initial analysis used the ASD approach. Secondary data in the form of soil data and river slope cross sections were obtained from the previous planning consultant, then the analysis was carried out with GEO5 software. The initial model was created first with the same parameters as the previous planning in order to provide the same penetration, displacement and internal force requirements as the planning consultant. The same model in the analysis results will be used as an analysis model for the LRFD approach and the analysis results in the LRFD model will be compared with the analysis model in the ASD approach. Based on the results of the LRFD analysis on the Strength boundary condition, it was found that the LRFD method gave a penetration depth 21.7% greater than ASD, moment force 40% greater than ASD and shear force 7.8% greater than ASD. A more detailed approach needs to be carried out on other boundary conditions such as Service and Extreme in order to provide more optimal comparison results
KOMPARASI ANALISIS BANGUNAN PENGAMAN LERENG MENGGUNAKAN METODE LOAD RESISTANCE FACTOR DESIGN DAN ALLOWABLE STRESS DESIGN Harjanto, Furqaan; Rofiyantama, Dega; Maharani, Mentari Putri
Jurnal Teknik Sipil dan Arsitektur Vol. 30 No. 1 (2025): JURNAL TEKNIK SIPIL DAN ARSITEKTUR
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v30i1.4366

Abstract

Retaining walls are important structures in civil construction used to resist soil and water pressure. Two common methods used for retaining wall analysis are the Load and Resistance Factor Design (LRFD) and Allowable Stress Design (ASD) methods. LRFD is based on the principle of probabilistic balance and considers an explicit safety factor to ensure that the capacity of the structure is greater than the loads that may occur, while ASD is based on the principle that the stresses acting on the structure should not exceed the allowable stresses for the material and is simpler than the LRFD method, but does not consider the safety factor explicitly and does not account for uncertainties in materials, loads and analysis. With the different approaches in LRFD and ASD analysis, this study aims to compare the analysis results with LRFD and ASD approaches in the case of a secant pile-type retaining wall on the slope of river X where the initial analysis used the ASD approach. Secondary data in the form of soil data and river slope cross sections were obtained from the previous planning consultant, then the analysis was carried out with GEO5 software. The initial model was created first with the same parameters as the previous planning in order to provide the same penetration, displacement and internal force requirements as the planning consultant. The same model in the analysis results will be used as an analysis model for the LRFD approach and the analysis results in the LRFD model will be compared with the analysis model in the ASD approach. Based on the results of the LRFD analysis on the Strength boundary condition, it was found that the LRFD method gave a penetration depth 21.7% greater than ASD, moment force 40% greater than ASD and shear force 7.8% greater than ASD. A more detailed approach needs to be carried out on other boundary conditions such as Service and Extreme in order to provide more optimal comparison results
Implementasi Sekolah Tangguh Manajemen Keselamatan Transportasi pada SD IT Taruna Teladan Amar, Tsulis Iq'bal Khairul; Ramandha, Syntia; Rofiyantama, Dega
Jurnal ABDI: Media Pengabdian Kepada Masyarakat Vol. 11 No. 1 (2025): JURNAL ABDI : Media Pengabdian Kepada masyarakat
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/abdi.v11i1.34183

Abstract

Di Indonesia, angka kecelakaan transportasi masih menjadi masalah serius yang perlu segera diatasi, terutama yang melibatkan siswa sekolah. Penelitian ini bertujuan untuk meningkatkan kesadaran dan keterampilan keselamatan transportasi di kalangan siswa melalui implementasi program "Sekolah Tangguh Manajemen Keselamatan Transportasi" di SD IT Taruna Teladan. Metode yang digunakan meliputi pre-test, pemaparan materi, dan post-test untuk mengukur pemahaman siswa sebelum dan sesudah pemberian materi. Hasil penelitian menunjukkan peningkatan signifikan dalam pemahaman siswa mengenai keselamatan transportasi, dengan nilai rata-rata pre-test sebesar 38 dan post-test sebesar 98. Workshop interaktif terbukti efektif dalam meningkatkan pengetahuan dan keterampilan siswa dalam menghadapi situasi darurat di transportasi. Disarankan agar pendidikan keselamatan transportasi diintegrasikan ke dalam kurikulum sekolah, diadakan pelatihan dan simulasi rutin, serta ditingkatkan kerjasama dengan pihak terkait untuk memastikan implementasi program yang efektif dan konsisten.
Co-Authors Afif Faishal Agung Supriyanto, Agung Amar, Tsulis Iq'bal Khairul Ari Mukti Wibowo Fachry Abda El Rahman Furqaan Harjanto Maharani, Mentari Putri Nur Aklis Pambudi, Hafizt Bagus Ramandha, Syntia