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STATIC LOADING ANALYSIS ON THREE-WHEELED ELECTRIC VEHICLE FRAME USING SOLIDWORKS
Full text linkAnalisis menggunakan metode Finite Element menghasilkan data secara menyeluruh dan detail. Respon fisik sistem terhadap beban di beberapa titik mampu terbaca. Hal tersebut sangat berguna dibidang engineering, terutama pada kendaraan dan analisis struktur. Penelitian ini bertujuan untuk mencari nilai tegangan, regangan maksimal serta displacement dengan pembebanan statis dari struktur rangka pad akendaraan listrik roda tiga. Kendaraan listrik roda tiga yang digynakan diharapkan memiliki kapasitas beban angkut yang besar sehingga simulasi ini sangat diperlukan. Hasil simulasi menunjukkan bahwa nilai tegangan maksimum pada rangka sasis ketika diberi beban 1500 N adalah 0,0244 MPa serta 5,26×10-13 dan 1,27×10-7 untuk regangan minimum dan maksimum. Sedangkan nilai displacement yang didapat adalah 6,208×10-4 mm. Dari hasil tersebut dapat dismpulkan bahwa struktur rangka sudah cukup baik dalam menahan beban yang diberikan
ANALYSIS OF THE EFFECT OF BILGE KEEL ON THE ROLLING MOTION OF RO-RO FERRY SHIP USING THE STRIP-THEORY METHOD
Full text linkShips are a mode of transportation that is often used by the community as a link between the islands. People generally use the ferry as a mode of crossing in addition to the economical price but also comfort is still preferred. But in recent years, researchers have often heard cases of shipwrecks. Especially ship crossing accidents caused by overturned ships. Based on this, prevention is needed to reduce the number of ship accidents in the future. One of the keys that can be taken is to improve the technical analysis before the ship is designed. One such analysis related to the ship is seakeeping ship. The method used in this study is to use strip – theory method through OSM program. This method is one of the commonly used methods because it calculates the 3D model into 2D. The results showed the effect of the use of Bilge keel on the ferry Ro-Ro tested with conditions x0, x1, x2, and x3 on the condition of the stationary ship with a wave height of 1,5 m and heading 90o. The addition of Bilge keel is able to reduce the resonance of roll motion up to 58% in conditions of variation x1, 61% in variation x2, and 67% in conditions of variation x2. Therefore, the installation of bilge keel has a significant effect on the rolling of ferry Ro-Ro
DESIGN AND PROTOTYPING OF ELECTRIC CARRYING TRACTORS
Full text linkLocations with hard-to-reach access make people living in 3T (Terluar/Front, Terpencil/Remote, Terbelakang/Backward) areas unable to enjoy quality fuel oil (BBM) at affordable prices. This research provides solutions for people in remote areas and communities in the 3T area to utilize agricultural equipment without dependence on fuel. The agricultural equipment in question is a Multifunctional Portable Tractor driven by an electric motor, using a battery. Batteries are recharged from solar sources through solar panels, water turbines and wind turbines. The research method used adopts the "Walter Franco" method (Franco et al., 2020). Product design and development involved 3 farmer groups from 3 different regions in West Java and six small machinery component industries in West Java, Indonesia. Research methodology involves the use of observations and field testing prototypes as instruments. This research resulted in innovative equipment that can be used for sloping land farming. This equipment is the only mechanical agricultural equipment that can be folded and carried by one person, so its contribution to research in inclined land farming is very large. This equipment is proven to cultivate land on sloping land profitably, so its contribution to farmers in Indonesia and other countries will be very significant
Keywords: Carrying tractor, Electric drive, 3T, Sloping land, Agricultural mechanizatio
PERFORMANCE ANALYSIS OF THE ELECTRIC TROLLEY OF OXYGEN CYLINDERS BASED ON THE ROAD SLOPE
Full text linkThe demand for efficient distribution of oxygen cylinders at Abepura Regional General Hospital (RSUD Abepura) has been steadily increasing due to the growing needs of staff members and patients who expect high-quality service within the hospital premises. In response to this demand, this study aims to propose a transportation system that is not only automated but also time-saving, with the ultimate goal of enhancing medical services in a more efficient, eco-friendly, and safe manner. One of the main challenges faced in the distribution process is the hilly terrain surrounding RSUD Abepura. The presence of these hills makes it difficult to manually distribute the heavy 72 kg gas cylinders, which is the current method employed at the hospital. To overcome this challenge, this research suggests implementing an innovative solution—an electric trolley—that can effectively facilitate the distribution and flow of oxygen cylinders at RSUD Abepura. The findings of this study conclusively demonstrate that the electric trolley is not only a suitable but also a convenient solution for the operators and medical staff involved in the distribution process. By utilizing the electric trolley, they can distribute oxygen cylinders without facing any hindrances posed by the uphill roads, ultimately resulting in significantly improved time efficiency and service effectiveness at RSUD Abepura
THE EFFECT OF ENGINE NOISE ON CADETS AT THE INDONESIAN AVIATION ACADEMY VOCATIONAL SCHOOL BANYUWANGI
Full text linkNoise is a sound that causes sound violence and disturbs humans. In the aviation industry, noise affects flight safety and success because it can interfere with the concentration and performance of flight cadets. In addition, high intensity can also cause stress and fatigue in flight cadets, reducing their ability to maintain focus and respond to critical situations. This study aimed to analyze the impact of noise produced by engine sounds and radio signals on pilots. The results of this study on the aircraft dashbord sound noise value is greater because the aircraft dashbord clan is located adjacent to the engine while the smallest noise value is found in data retrieval in the back seat because it is farther from the engine. The data collection carried out produces output in the form of data resulting from the effect of engine noise on cadets.
Keywords: noise,cadets,engine soun
CHARACTERIZATION OF SALAK WEDI ACTIVATED CARBON STRUCTURE USING KOH AND ZnCl2 ACTIVATOR
Full text linkActivated carbon can be made from a variety of organic and inorganic raw materials. One of the organic materials with great potential in the manufacture of activated carbon is the bark of salak wedi(Salacca Zalacca). The purpose of this study was to determine the physical characteristics of the activated carbon of salak wedi peel which has been chemically activated using KOH and ZnCl2 with the process of being activated once using only KOH or ZnCl2 and multilevel activation using a combination of KOH and ZnCl2 to determine the number of pores in the sample and to determine the presence of a crystal structure in the sample. The research method includes sample making, single and multilevel activation processes, then SEM and XRD tests are carried out. The results of SEM with multilevel activation have more pores than the activated carbon sample of bark once. The SEM results obtained that the multilevel activation has a larger number of pores compared to the activation which is only carried out once, with the result that the largest pore volume with the stratified activator Carbon KOH + ZnCl2 (s) is 35,976,798,714 nm3. The XRD analysis indicated that activated carbon from the bark of salak wedi is a material with good conductivity properties because it has a relatively high crystalline structure, both on one-time activation and multilevel activation. Time using KOH activator obtained phase crystalline with the most significant percentage if compared with another activation
ENHANCE THE HEAT AND FLAME CHARACTERISTICS OF SAGO BRIQUETTES WITH AND WITHOUT ADJUSTERS
Full text linkExperimental investigations were conducted to assess the impact of an adjuster on the heating efficiency and flame stability of sago waste briquettes. The adjuster was introduced to maintain a consistent burning distance, thereby enhancing the combustion heat of the fuel. Infrared thermometry was employed to monitor the temperature evolution within the briquette and the combustion load, represented by water in a pan. The findings demonstrate that adding an effective adjuster significantly improves the performance of both the briquettes and the stove, resulting in enhanced effectiveness and efficiency. This is evident from the observed increase in combustion temperature and faster boiling time of the water. The consistent burning distance ensures a stable and uniform heat supply to the briquettes, facilitating more efficient fuel utilization as all parts of the fuel can undergo complete combustion and transfer heat to the pan. Molecular analysis reveals that the stability of the burning distance weakens the Van der Waals bonds within the carbon chain, thereby increasing the reactivity of the fuel molecules. Consequently, the fuel exhibits improved heat absorption capability and becomes highly combustible
PERANCANGAN BILAH INVERSE TAPER BERBAHAN STYROFOAM DENGAN AIRFOIL NACA 4412
Full text linkIn the manufacture of wind turbines, there are several parameters that are taken into account, namely the wind speed in the area to be installed. The wind speed in Indonesia ranges from 3m/s – 11m/s, so it is quite difficult to implement a macro-scale wind turbine and the facilities are still inadequate. So this design is a design to make a micro-scale wind turbine that adapts to the characteristics of wind speed in Indonesia. In this design, a blade with the Inverse Tapper type is made which is a blade type with an enlarged shape to the end to get a large sweep at the end of the blade and produce a lift force that is greater than the drag force on the blade so that it can rotate the blade. In the design of this blade, material changes are also made, generally the material used in the blade is made of wood, fiber, and aluminum. In this design, a material made of styrofoam is used, this is to make the mass of the blade lighter and make the blade able to rotate at the smallest wind speed. In this design, the maximum power obtained is 553 watts at 668 rounds of blade rotations
. Keywords : Airfoil, Inverse Blade, Cl/Cd, Styrofoam
SIMULASI BEBAN RANGKA PADA MESIN PENGGILING SEKAM PADI MENGGUNAKAN PERANGKAT LUNAK
Full text linkOne of the main components in the rice husk grinding machine is the frame. The frame is the most important fundamental part, especially for use in machinery, because the function of the frame is as a support for the components themselves, and is able to withstand axial, normal and moment forces to maintain stability in the machine. The strength of the frame depends on the shape or type of construction which is able to withstand torsional loading from the engine and also withstand the shock that is given when the engine moves. So the purpose of this study is to find out how to simulate the loading of the frame on a rice husk grinding machine using SolidWorks software, and to know the comparison of theoretical calculations and simulations for 3 material variations on the frame of a rice husk grinding machine in a static state. The method used is the Finite Element Method (MEH), MEH with software can determine the loading points. From this test, researchers can find out which points have a minimum load, a medium load, and a maximum load. The results of the analysis provide the safety value of original and processed materials, changes in materials can be concluded which material is more ideal. The results of this study are that among AISI 1010, ASTM A36, and AISI 1045 materials, the best material is AISI 1045 material because it has the greatest safety factor value of 12.15
AKURASI MESIN CNC ROUTER LOW BUDGET BERBASIS MACH 3
Full text linkThis paper discusses the building of a low-cost CNC router machine. In designing a CNC machine using an electrical actuator as the driving force, we use a nema 23 stepper motor combined with a pitch 2 mm timing belt to drive the machine on the x and y axes. On the z-axis, we use a stepper motor and a linear screw to drive the machine. This machine is often used to cut and engrave wood, acrylic, and PCB objects. The design drawing that has been made on the PC is sent to the microcontroller using serial communication, then the CNC performs work on the thing according to the coordinates. The spindle will create a pattern on the thing automatically according to the design drawing. Measurement was made using a caliper with an accuracy of 0.05 mm. This CNC machine is performing duly as ordered by the mach3 micro controller. The machine test results show an accuracy value of 99.85% on the x-axis, 99.74% on the y-axis, and 99.12% on the z-axis