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All Journal Jurnal Pendidikan Teknik Mesin Sainteknol : Jurnal Sains dan Teknologi Rekayasa Mesin Journal of Mechanical Engineering Science and Technology Automotive Science and Education Journal Journal of Mechanical Engineering Learning Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Jurnal Inovasi Mesin Journal of Mechanical Engineering Learning
Widya Aryadi
Prodi Pendidikan Teknik Mesin Universitas Negeri Semarang
Automotive Engineering Computer Science & IT Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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PENGARUH VARIASI DEBIT UDARA MASUK TERHADAP KAPASITAS AIR YANG DIHASILKAN OLEH ATMOSPHERIC WATER GENERATOR Safi'i, Imam; Aryadi, Widya
Sainteknol : Jurnal Sains dan Teknologi Vol 16, No 1 (2018): June 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v16i1.15135

Abstract

The water extracter from the air is still using the principle of external flow so it is considered cooling efficiency is still not good. In this research using internal air flow by using copper pipe with 2 type of design that is design A and B. This process of heat absorption does not occur suddenly, it takes time to arrive at equilibrium point, therefore the air discharge has affect the cooling process. The results showed that the air discharge affect the capacity of condensate water. Design A produces a maximum water capacity of 145 ml in one hour at 25 lpm, while design B generates maximum condensate water of 178 ml in one hour at 15 lpm.
ANALISIS DISTRIBUSI PENGEREMAN TERHADAP CENTER OF GRAVITY PADA INTEGRATED BRAKING SYSTEM BERBASIS MATLAB SIMULINK Muadzin, A; Aryadi, Widya
Sainteknol : Jurnal Sains dan Teknologi Vol 16, No 2 (2018): December 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v16i2.17237

Abstract

Sistem pengereman merupakan salah satu sistem yang mempengaruhi keamanan berkendara. penelitian ini bertujuan untuk menganalisis distribusi kekuatan pengereman sistem rem IBS (Integrated Braking System) terhadap Center of Gravity yang tepat untuk motor Honda Blade. Metode penelitian yang digunakan adalah Research and Defelopment (RD) yaitu menghitung spesifikasi sistem rem IBS. Memodifikasi blok diagram sistem rem IBS menggunakan software MATLAB Simulink dengan memasukkan input ukuran massa kendaraan, ukuran sistem rem, ukuran roda, kecepatan awal sebelum dilakukan pengereman, massa kendaraan dan hasil simulasi (output) berupa waktu pengereman, jarak pengereman, dan torsi pengereman. Hasil penelitian menunjukkan jarak pengereman pada saat kecepatan awal 100 km/jam dan beban motor 162 kg yaitu 21,044 m. Saat beban motor 222 kg yaitu 23,698 m yang menunjukan jarak pengereman pada sistem rem IBS dapat memperpendek jarak pengereman dari rem konvensional dan kendaraan tetap dapat dikendalikan.
Finite Element Analysis of the Construction Strength of Semi-Submarine Glass-Bottom Catamaran Puteri, Berliana Ayarent; Putrananda, Musdika Bagas Satria; Hutagalung, Christian Imanuel; Bahatmaka, Aldias; Aryadi, Widya
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i12025p243

Abstract

Indonesia's extraordinary marine tourism potential requires innovation in how to enjoy it. This study discusses the innovative design of a semi-submarine glass-bottom ship for the development of marine tourism in Indonesia, which allows tourists to enjoy the beauty of the underwater world safely and comfortably. This catamaran is designed with two hulls that provide high stability and optimal deck area for tourism needs. The study focuses on analyzing the ship's frame structure using the finite element analysis method, especially on using sandwich panels that combine wood and carbon fiber materials to achieve the optimal combination of structural strength, weight, and cost efficiency. Finite element analysis shows that sandwich panels with 100% carbon fiber composition provide the best mechanical performance with a maximum stress of 615.41 MPa. The analysis shows that adding carbon fiber plays a significant role in reinforcement and is a more effective stress distributor than homogeneous materials. Although the 100% carbon fiber formulation provides the highest safety factor, the study recommends a combination of 70% wood and 30% carbon fiber, or 60% wood and 40% carbon fiber for the construction of the ship's hull frame as a more optimal solution in terms of technical and economic aspects. This ship design innovation is expected to become a new tourist attraction that introduces the beauty of Indonesia's underwater world to domestic and foreign tourists while encouraging the development of a sustainable marine tourism industry.
Finite element method based analysis of lower body structural strength on rekarya ev electric car Wibisono, Kristian; Aryadi, Widya
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 2 (2024): December
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i2.18674

Abstract

In line with current technological developments, the use of electric vehicles is expected to increase due to their environmentally friendly nature—primarily because they produce no exhaust emissions. One of the critical structural components of an electric car is the lower body. The lower body of the Rekarya EV has been specifically designed to accommodate three rows of seating. This study aims to evaluate the structural strength of the Rekarya EV's lower body under static loading conditions by analyzing von Mises stress, displacement, and safety factor values. The analysis was carried out using the Finite Element Method (FEM) through Autodesk Inventor Professional 2020. A static stress analysis was performed using ASTM A36 steel material with three different thickness variations: 1.0 mm, 1.2 mm, and 1.4 mm. The resulting von Mises stress values were 72.88 MPa, 62.24 MPa, and 51.66 MPa, respectively. The corresponding displacement values were 1.366 mm, 1.295 mm, and 1.212 mm. The calculated safety factors were 3.41, 3.99, and 4.8. Additionally, the total weight of the lower body for each thickness was calculated as 88.012 kg, 100.823 kg, and 113.613 kg. The results indicate that all three thickness variations provide adequate safety factors; however, increasing material thickness significantly affects the overall weight of the structure. Therefore, a balance between strength and weight must be considered in the design process.
STRUCTURAL ANALYSIS OF SEMI-SUBMARINE MONOHULL SHIP FOR TOURISM APPLICATIONS BY USING FINITE ELEMENT METHOD Hutagalung, Christian Imanuel; Bahatmaka, Aldias; Aryadi, Widya; Putrananda , Musdika Bagas Satria; Puteri, Berliana Ayarent
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.2020

Abstract

The research assesses the structural integrity of a semi-submersible monohull glass-bottom vessel designed for tourism, featuring a hull length of 9 meters. Finite Element Analysis (FEA) was employed to simulate five loading scenarios: full load, 75% capacity, 50% capacity, 25% capacity, and no load. The ship's structural basis was designated as the boundary condition. The peak equivalent stress under full load was 297.58 MPa, with validated values at 293.93 MPa. Additional scenarios demonstrated comparable concordance between FEA simulations and validations, with stress values spanning from 296.85 to 297.4 MPa and validation results ranging from 293.4 to 293.79 MPa. All calculated safety factors surpassed 2.25, guaranteeing adherence to SOLAS Chapter II-1 rules. The results validate that the ship's hull design complies with structural integrity norms under operational loads, instilling confidence in its performance for tourism purposes.
Strength Analysis of Rollers and Supports of A Hydraulic Dynamometer Chassis Using Finite Element Method Bagaskoro, Satria; Aryadi, Widya
Jurnal Inovasi Mesin Vol. 6 No. 1 (2024): APRIL 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v6i1.8961

Abstract

The measuring performance tool of electric motorcycle in Indonesia is limited, which in contrast to the rapid development of motorcycle technology. Therefore, this study aims to develop a chassis hydraulic dynamometer as a tool to measure the mechanical parameters of electric motorcycles This research was conducted using an experimental method based on simulations with SolidWorks 2022 software as the simulation tool for roller and support strength. Simulation was performed on variations 35 mm, 40 mm, and 45 mm shaft diameter roller, using AISI 1045 steel material. Based on calculations and simulation results, a roller with a 35 mm shaft diameter can withstand the applied external load with a maximum von Mises stress of 2,394 x 108 N/m2², a maximum strain of 7,283 x 10-4, a maximum displacement of 6,275 x 10-2 mm, and a minimum safety factor of 2.2. Based on calculations and simulation results, the roller with a 35 mm shaft diameter is safe, optimal, and efficient in terms of material usage. Therefore, a roller with a 35 mm shaft diameter and SKF UCP 207 support was selected for use on the chassis hydraulic dynamometer
Strength Analysis of Wheel Stopper Design on Dyno Test Based on Solidwork 2019 Software Purba, Samuel Julianto; Aryadi, Widya
Jurnal Inovasi Mesin Vol. 6 No. 2 (2024): OCTOBER 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jim.v6i2.20153

Abstract

Various innovations have been made in all parts of the world to deal with global warming. One of them is making electric vehicles. One of the things that must be done to keep up with the number of electric vehicle production is to innovate the vehicle 'test' tool. The dyno test is one of the 'test' tools for electric vehicles on two wheels. One of the innovation gaps that can be addressed is creating a wheel stopper design on a new dyno test to speed up production time. The wheel stopper was designed using a hydraulic system with MTEK WC1 UNS J13047 cast alloy steel metal material. The design was done using Autodesk Inventor 2024 and analyzed using Solidwork 2019. Then, the analysis results are compared with the existing wheel stopper design using ASTM A36 steel. It will also determine whether a hydraulic system design can be implemented. The maximum displacement and minimum safety factor results obtained on the hydraulic wheel stopper are 0.1746 mm and 2.5. These results show that the hydraulic wheel stopper design can be implemented
Design and Construction of a Leisure Boat Bottom Glass Prototype as An Underwater Panorama Tourism Ride in Karimunjawa Aryadi, Widya; Bahatmaka, Aldias; Karnowo, Karnowo; Rumondang, Juwita Ria; Rumapea, Fedrik Immanuel; Kurniawan, Ahmad Khusom; Kusuma, Anwar Widjaya; Hidayat, Indra Nurul
Rekayasa Vol. 22 No. 1 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v22i1.13881

Abstract

The lack of proper tourism infrastructure often limits the potential of marine ecotourism. In Karimunjawa, coral reef tourism is a major attraction. However, accessibility remains an issue, especially for visitors who cannot swim or dive. This research focuses on the design and construction of a glass-bottom leisure boat prototype to provide a safe and immersive underwater panorama experience. This study falls within naval architecture and marine engineering, addressing the challenge of designing a stable, efficient, and safe tourism vessel. A key concern in ship design is balancing hydrodynamic efficiency with stability. While monohull boats are common, their transverse stability is relatively low. To overcome this, a catamaran hull configuration was chosen for better stability, larger deck space, and reduced resistance. The prototype was constructed with dimensions of 21.81 m in length, 2.63 m in height, and 7.51 m in width, featuring a glass-bottom viewing area to enhance the tourism experience. Hydrodynamic performance analysis showed an average increase in resistance of 12.39307 N as speed increased, demonstrating the vessel’s efficiency. The construction and testing process confirmed that the catamaran hull improves passenger safety, minimizes capsizing risk, and enhances the underwater viewing experience. This research contributes to sustainable marine tourism by introducing an innovative tourism ride that allows visitors to explore the underwater beauty of Karimunjawa without requiring diving skills. The successful design and construction of this prototype provide a model for future eco-aafriendly tourism vessels.
Performance Analysis of 18-Slot 12-Pole Ring-Type Orbital Electric Motor With Variations Of Neodymium and Low-Carbon Steel Rotors Using Femm 4.2 Software Aryadi, Widya; Putra Julian Valentino, Michael; Apriaskar, Esa
Rekayasa Vol. 23 No. 1 (2025)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v23i1.38037

Abstract

This study aims to evaluate the performance of a ring-type orbital electric motor by examining the effects of variations in magnet position and configuration on flux linkage, force, and torque, and by comparing the results with those of a radial electric motor. The method employed is a 2D numerical simulation using FEMM 4.2 software. The design variations include the use of 0% (Pure) permanent magnets as well as magnets with lamination levels of 25%, 35%, and 50% for the orbital motor type. The simulation results indicate that the orbital motor with 0% (Pure) permanent magnets achieves the highest flux linkage of 3.13 Weber and the highest maximum torque of 336 Nm. For maximum force, the orbital motor with 25% laminated magnets shows the best result at 5207 N. Conversely, the radial motor with 0% (Pure) permanent magnets exhibits the lowest performance across all three parameters. Additionally, increasing the magnet lamination percentage does not always improve performance, as a decline is observed at 50% lamination. Overall, the orbital motor demonstrates superior performance compared to the radial motor.
Co-Authors - Sunyoto Agus Santoso Aldias Bahatmaka Aris Budi Bagaskoro, Satria Candra Wahyu Sportyawan, Candra Esa Apriaskar fajar, syahwal Harnendro Prasetyawan, Harnendro Hidayat, Indra Nurul Hutagalung, Christian Imanuel Karnowo - Khoiron, Ahmad Mustamil Kurniawan, Ahmad Khusom Kusuma, Anwar Widjaya M. Khumaedi M. Lutfi Zaeni F, M. Lutfi Muadzin, A Muadzin, A Mudinillah, Adam Muhammad Fitron Noktaviyanda Nana Kariada Trimartuti Purba, Samuel Julianto Puteri, Berliana Ayarent Putra Julian Valentino, Michael Putrananda , Musdika Bagas Satria Putrananda, Musdika Bagas Satria Ruli Silo Prabowo Rumapea, Fedrik Immanuel Rumondang, Juwita Ria Safi'i, Imam Samsudin Anis Setiawan Hendarto, Setiawan Sudik -, Sudik Suharsono, Edy Sunyoto Sunyoto Vidiyanto, Bagus Prabowo Wibisono, Kristian Widi Widayat Wirawan Sumbodo