Kumpulan Jurnal dan Prosiding Elektronik PPNS (Politeknik Perkapalan Negeri Surabaya - Pusat Penelitian dan Pengabdian Masyarakat, P3M)
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Pengaruh Karakteristik Individu, Beban Kerja dan Kelelahan Kerja terhadap Perilaku Tidak Aman Pekerja Perusahaan Alat Transportasi
Full text linkSemakin berkembangnya teknologi dan permintaan pasar mengenai alat transportasi menjadikan aktivitas yang ada pada perusahaan manufaktur alat transportasi lebih padat. Berdasarkan data kecelakaan kerja perusahaan pada awal paruh tahun 2023 diketahui perilaku tidak aman menjadi penyebab paling besar pada kecelakaan kerja dengan persentase sebesar 69%. Penelitian ini dilakukan untuk mengatahui pengaruh antara karakteristik individu, beban kerja dan kelelahan kerja terhadap perilaku tidak aman pekerja. Variabel bebas yang digunakan adalah usia, masa kerja, pengetahuan K3, beban kerja fisik, beban kerja mental dan kelelahan kerja. Jumlah pekerja yang menjadi responden pada penelitian ini sebanyak 73 orang. Teknik penentuan sampel yang digunakan adalah teknik total sampling. Jenis penelitian ini adalah penelitian kuantitatif dengan desain cross sectional. Metode yang digunakan dalam penelitian ini adalah metode analisis regresi linier berganda. Pada uji pengaruh yang telah dilakukan didapatkan hasil bahwa terdapat pengaruh yang signifikan terhadap perilaku tidak aman untuk variabel pengetahuan K3 (p-value = 0,024) dan variabel kelelahan kerja (p-value = 0,022). Rekomendasi yang dapat diberikan adalah memberikan pelatihan secara berkala agar pengetahuan K3 yang dimiliki pekerja terjaga dan tetap update, pengondisian waktu istirahat sehingga pekerja mendapatkan istirahat yang efektif agar terhindar dari kelelahan kerja serta pemberian pelatihan manajemen pada atasan sehingga dapat meningkatkan komunikasi serta mendukung tim secara efektif dan empati
Optimasi Parameter Mesin Laser Tube Cutting Terhadap Kekasaran Permukaan Dan Laju Pemotongan Pada Square Pipe ST 37 Menggunakan Taguchi Grey Relational Analysis Method
Full text linkCNC TruLaser Tube 5000 TRUMPF machine is used to perform cutting process in PT. Dempo Laser Metalindo. The quality of the cut product produced is required to have minimum roughness value, but in every cut result especially on Square Pipe St 37 material there is cutting defect. Cutting defect in the product result is surface roughness. Surface roughness can affect the cutting rate on the material, the solution to get cutting quality with minimal roughness and maximum cutting rate is to analyze the parameters that affect the response by optimizing the parameters. The parameter variables to be optimized are focus point, cutting gas pressure, nozzle distance, and laser power. This study uses Square Pipe St 37 material and the experimental design uses Taguchi Method combined with Grey Relational Analysis using orthogonal matrix L9 (34). From the results of the research that has been conducted, it was obtained that the most optimal combination of parameters for cutting rate and surface roughness is the focal point at level 2 which is 2 mm, nozzle distance at level 3 which is 1,1 mm, and laser power at level 3 which is 2700 W. The focal point parameter provides a percentage contribution of 38.60%, while the nozzle distance parameter provides a percentage contribution of 6.42%, and the laser power parameter provides a percentage contribution of 35.92%
Pengaruh Pre-Heat dan Interpass Temperature terhadap Kekuatan Tarik Sambungan Demand Critical Weld
Full text linkWelding of High Strength Low Alloy (HSLA) steel requires special attention to parameters such as interpass temperature and preheat. This study evaluates the effect of variations in interpass temperature (200°C and 300°C) and preheat (100°C and 200°C) on the tensile strength of welded joints in ASTM Grade 50 material with a thickness of 25 mm, using the Flux-Cored Arc Welding (FCAW) process. The purpose of the study was to determine the most effective temperature and to test whether the joints meet client specifications without interpass temperature. Tests were conducted with All Weld Tension according to AWS D1.8 standard. The test results showed that the tensile strength of the test specimens at all interpass temperature variations met the AWS D1.8 acceptance criteria, which is above 490 MPa. The results of this study revealed that the 200°C preheat and 300°C interpass temperature variation had the highest tensile strength value, namely 579.73 MPa. It can be concluded that the interpass temperature does not have a significant impact on the value of all weld tensio
Penilaian Risiko Kebakaran Berbasis HIRADC dan NFPA 551 pada Gedung Workshop Jasa Fabrikasi Konstruksi
Full text linkThe manufacturing sector frequently involves fabrication processes. The products manufactured undergo various fabrication production steps. The fabrication process utilizes machinery such as lathes, presses, bending machines, roll machines, shearing machines, welding machines, shotblast machines, and painting machines, which are classified as hot work activities that carry the potential to ignite both small-scale and large-scale fires. NFPA 1 Chapter 10 on General Safety Requirements mandates that all buildings, whether new or existing, must be designed, installed, maintained, and operated in compliance with regulations aimed at creating a safe working environment for employees. The initial phase of the research entailed hazard identification using the Hazard Identification, Risk Assessment, and Determining Control (HIRADC) approach, followed by a Fire Risk Assessment conducted in accordance with NFPA 551 standard guidelines. The HIRADC results revealed that the workshop contains work activities with the potential to spark fires, comprising 11 activities in the fabrication workshop area, 7 activities in the office area, 4 activities in the warehouse, 2 activities in the yard, and 3 activities in the employee mess, all of which lack adequate fire protection systems. Based on the Fire Risk Assessment, the 25 identified fire hazards can be downgraded to 5 moderate fire hazards and 2 moderate fire hazards by implementing active fire protection measures, such as fire extinguishers, hydrants, sprinklers, detectors, and fire alarms
Implementasi Failure Mode and Effect Analysisis (FMEA) dan Diagram Pareto untuk Analisis Kegagalan Komponen Continuous Casting Machine pada Perusahaan Baja
Full text linkSteel companies are one of the manufacturing companies that play an important role in the Indonesian economy. In the production process, these companies use various production machines, one of which is the Continuous Casting Machine (CCM). CCM is one of the most important machines in steel companies because it is a steel molding machine which determines the success of steel production. In its use, CCM often experiences failures that hinder the production process and cause material losses for the company. To overcome these problems, this research uses the Failure Mode and Effect Analysis (FMEA) method to analyze failures in CCM components, identify failure modes and their impacts, and conduct risk assessments using the Severity, Occurrence, and Detection (SOD) multiplication approach. In addition, Pareto diagram analysis was conducted to determine critical components, so that the company can prioritize maintenance activities and improve CCM reliability. FMEA analysis showed that out of 14 main components with 41 subcomponents, there were 59 failure modes. The tundish component was identified as the component with the highest Risk Priority Number (RPN) of 350, with the failure mode of tundish leakage. Further Pareto diagram analysis highlighted 4 critical components, including tundish, roll (mold), roll (roll apron), and roll press. The insights gained from this analysis are expected to enable the company to maintain CCM reliability and prioritize maintenance efforts on identified critical components, thereby mitigating the impact of potential failures
Perancangan Website Pengukuran Kelelahan Kerja Berdasarkan Reaction Timer
No full textFatigue is one of the issues that can decrease productivity and increase errors among workers. Currently, a commonly used tool to measure work fatigue is the Reaction Timer. However, this tool is still considered impractical because it requires assembly connections and relies on electrical power. Additionally, using this tool involves a manual process in taking workers\u27 responses, recording, and calculating measurement results, causing the results to not be immediately available after the measurement is completed. To simplify the process of measuring work fatigue, a web-based work fatigue measurement tool was developed. This website was created using Visual Studio Code with PHP programming language and the Laravel framework. In the final stage of website testing, an average index value of 92% was obtained from the questionnaire. This indicates that the benefits of this website fall into the high category. Therefore, the website successfully meets user satisfaction and is very beneficial for them. The website testing results conclude that all features, ranging from the login process, form filling, audio and visual measurements, to measurement results and descriptions, as well as report generation in PDF format, function smoothly. Hence, this website is expected to significantly facilitate the measurement of work fatigue for its users
PENGARUH PERBEDAAN KERAPATAN ROUGH COAT PADA 3LPE COATING TERHADAP KEKUATAN GESER CONCRETE WEIGHT COATING
Full text linkThe coating process involves applying a protective layer to materials to prevent corrosion. One common pipe coating method uses the 3-layer Polyethylene (3LPE) and Concrete Weight Coating (CWC) techniques. However, shifts between the CWC layer and the 3LPE coating are often observed. This study was conducted to determine the effect of different densities and the application of a Rough Coat. Tests performed included density, compressive strength, and shear strength measurements. The density variations observed were 0 points/mm², 121 points/mm², 256 points/mm², and 441 points/mm². The compressive strength test yielded 34.71 MPa, 30.41 MPa, and 36.78 MPa, all exceeding the acceptance criteria of 24.1 MPa. The shear strength tests indicated that the higher the Rough Coat density, the greater the shear load capacity. The shear strength values for the Rough Coat density variations were 0.44 MPa, 0.78 MPa, 0.98 MPa, and 1.27 MPa, respectively. The results show that density variation and the use of Rough Coat significantly increase frictional force, enabling the coating to withstand larger loads and producing higher shear strength values. The Rough Coat with the highest density achieved the optimal shear strength
ANALISIS VARIASI JUMLAH PERLAKUAN HEAT STRAIGHTENING DAN TRAVEL SPEED MENGGUNAKAN TORCH GTAW PADA HASIL PENGELASAN MATERIAL PIPA STAINLESS STEEL 304 TERHADAP NILAI KEKERASAN, STRUKTUR MIKRO, DAN LAJU KOROSI
Full text linkThis study analyzed heat straightening using GTAW torch heating on SA-312 TP304 material with repair variations of 2x, 4x, and 6x, as well as travel speeds of 50 mm/min and 70 mm/min. The analysis includes microstructure, hardness, and corrosion rate using a three-electrode cell. Results show that specimens with 70 mm/min travel speed and 2x heat straightening have the highest hardness in the weld metal, HAZ, and base metal, valuing 165.5 kgf/mm², 170.5 kgf/mm², and 171.8 kgf/mm², respectively. Significant microstructural differences are seen in the HAZ at of 50 mm/min travel speed, where austenite and ferrite phases thickened at grain boundaries. Specimens with 50 mm/min travel speed and 6x heat straightening produced the highest heat input, resulting a weld bead width of 12.60 mm, while specimens with 70 mm/min travel speed and 2x heat straightening had the lowest heat input with a weld bead width of 10.75 mm. specimens with 6x heat straightening at 50 mm/min travel speed have the highest corrosion rate of 0.9515 mm/year, whereas specimens with 2x treatment at 70 mm/min have the lowest corrosion rate of 0.1656 mm/year. This study shows that heat straightening is directly proportional to the corrosion rate and inversely proportional to hardnes
OPTIMASI PARAMETER PENGELASAN PULSE CURRENT GTAW TERHADAP NILAI DISTORSI PADA MATERIAL SA240 TYPE 304L
Full text linkTIG pulse current or GTAW has various parameters that can affect the distortion value, including frequency, current, and flowrate. Optimization is carried out to find the optimal parameters in TIG pulse current welding on distortion, when an optimal parameter is found, a process becomes more optimal and effective. Taguchi and ANOVA methods are used because they are able to improve quality from before the process and during the process so that it is used in this study. The contribution of each parameter to the influence of the distortion value is also calculated to be able to produce a precise and accurate analysis. In this welding, the optimum value is obtained and produces the average value of the test with the least distortion value is the frequency of 3hz, current 1A, and flowrate 12 L/min., and for the percent contribution of each parameter to signal to noise ratio value is 79,88% at frequency, 19,43% at current, and 0,09% at flowrate
ANALISIS FATIGUE LIFE PADA CHASSIS SIDE DUMP TRUCK 085 DENGAN METODE ELEMEN HINGGA
Full text linkSide dump trucks must be ensured to be in good condition and able to safely support the load. Usually, in the transportation process, repetitive stresses occur that can cause fatigue over a period of time, which affects the construction life. This journal objective is to analyze and evaluate the fatigue life value of the chassis frame to understand its effect on stress location, highest stress value, and construction life using Ansys workbench software. Modeling is carried out using Autodesk Inventor software and converted into Ansys for simulation so that the stress range value is obtained for each loading. Furthermore, manual fatigue life calculations were carried out with reference to AWS D1.1. The simulation results showed that the highest stress occurred within the area inside the support hanger. The highest stress range occurs in 95 tons loading which is 125.57 MPa, that has a life of 75.93 years. While, the lowest stress range occurs in 85 tons loading which is 112.35 MPa, that has a lifespan of 106.04 years. The result of this study show that the greater the load the smaller the construction life