간행물
한국기계항공기술학회지(구 한국기계기술학회지) KCI 등재 Journal of the Korean Society of Mechanical and Aviation Technology
- 발행기관 한국기계기술학회
- 자료유형 학술지
- 간기 격월간
- ISSN 1229-604X (Print)2092-0385 (Online)
- 수록기간 1999 ~ 2026
- 주제분류 공학 > 기계공학 공학 분류의 다른 간행물
- 십진분류KDC 550DDC 620
권호리스트/논문검색
제27권 제3호 (2025년 6월) 23건
1.
2025.06
구독 인증기관 무료, 개인회원 유료
In this study, we focus on the design and verification of a relatively low-cost point absorber wave energy converter, addressing the high costs and maintenance challenges of conventional wave energy generation systems. The proposed mechanical energy conversion device generates electricity by transforming the vertical motion of wave height into the vertical motion of a magnet connected to a spring. A simulation was conducted to analyze the magnet’s oscillation amplitude based on its weight and the spring constant. The performance of the device was then verified through simple water tank experiments. This study aims to develop a cost-effective wave energy generation system that can compete with wind and solar power generation.
4,000원
2.
2025.06
구독 인증기관 무료, 개인회원 유료
This study examines the effects of additive manufacturing (AM) orientations and support structures on the compressive strength of lattice structures. Test specimens were fabricated using a selective laser melting (SLM) process with AlSi10Mg material under three conditions: horizontally aligned (0°), tilted at 45°, and supported. Compression tests were conducted using a universal testing machine (UTM) and Digital Image Correlation (DIC) to evaluate mechanical behavior. The results showed that the supported horizontal specimens exhibited the highest compressive strength, while the 45° tilted specimens had the lowest due to interlayer separation and localized failures. The findings highlight the significance of build orientation and support design in optimizing AM lattice structures. Future research should explore various lattice configurations, material selections, and post-processing effects to further enhance structural performance.
3,000원
3.
2025.06
구독 인증기관 무료, 개인회원 유료
A Study on the Effect of Design Parameters for Improving Durability of Trubocharger Compressor Wheel
In this study, the structural analysis for the compressor wheel of a high-speed rotating turbocharger is presented, and the failure phenomenon that occurred during the durability test is analytically reproduced. Next, in order to set the optimization conditions, the stress for design shape, fastening force, and press-fit condition were analyzed. As a result, the maximum stress in the failure areas increases as the fastening force increases. Therefore, in order to improve the durability of the compressor wheel, the axial force is reduced while applying the press-fit between the wheel and the shaft. Meanwhile, when the shape of the back surface of the wheel was changed, the stress was additionally reduced by approximately 8.5%.
4,000원
4.
2025.06
구독 인증기관 무료, 개인회원 유료
The IMO’S 72nd MEPC meeting proposed the goal of reducing greenhouse gas emissions by up to 50% by 2050. Thus, various eco-friendly fuels are proposed as alternatives, but there are also various issues that need to be tackled, such as storage stability and supply system issues in a special environment a ship has. Therefore, in this study, the possibility of reducing greenhouse gases was analyzed by applying MGO as an alternative to boilers operated with HFO, a Bunker-C series. As a result, the exhaust gas temperature decreased by about 11.54% from 316.9℃ to 280.3℃, and the amount of oxygen content increased by about 0.38% from 6.27% to 6.65%. It can be seen that carbon monoxide can be reduced by about 45.28% by simply converting fuel from 45.29 ppm to 24.78 ppm, and carbon dioxide, which is a typical greenhouse gas, can be reduced by about 0.49% from HFO by 11.08% to MGO by 10.59%. This means that some greenhouse gas reduction is possible only by shifting between ship fuels that satisfy ISO-8217, but since there are limitations to achieving strong carbon neutrality proposed by IMO, it will be necessary to actively utilize the use of various alternative fuels in the future.
4,000원
5.
2025.06
구독 인증기관 무료, 개인회원 유료
The chip processing system of large scale machine tool, such as planomiller, turning machine, boring machine and CNC machine, has been continuously used in many industrial fields. As the performance of chip processing system is improved, cutting work with high-precision is also required. This study aims to study the characteristics of the edged part of cutter depending on removing the cutter support in cutter assembly. As the results, the damaged spot in edged part of cutter was different whether the cutter support was installed or not. By removing the cutter support, the safety factor of edged part of cutter was decreased about 4.7 times and furthermore there were some advantages in less than 1.7kN of cutting force.
4,000원
6.
2025.06
구독 인증기관 무료, 개인회원 유료
NVH(Noise, Vibration, and Harshness) characteristics are critical indicators for evaluating automotive quality and diagnosing mechanical issues through abnormal vibrations during driving. Among various components, tires are the only part of the automotive in direct contact with the road, making them a major source of noise and vibration. Tire-related anomalies not only affect ride comfort but can also pose serious safety hazards. This study presents a diagnostic approach that utilizes NVH analysis, wheel balance inspection, and RFV(Radial Force Variation) measurement to identify and repair tire faults. Through case analysis, it was confirmed that abnormal vibrations caused by internal moisture accumulation and structural deformation of tires could be accurately diagnosed and addressed. The proposed method enables early detection of tire-related issues, providing a preventive maintenance strategy and contributing to enhanced automotive safety and reliability.
4,000원
7.
2025.06
구독 인증기관 무료, 개인회원 유료
In this study, an active vibration control experiment was conducted on a display manufacturing system weighing approximately 15 tons. Three pneumatic shakers were installed underneath the equipment to excite the entire structure at three different frequencies. On the top side of the equipment, four inertial-type electromagnetic actuators capable of generating forces in the x, y, and z directions were mounted, enabling 12 degrees of freedom to be controlled. At locations near the actuators, four tri-axial accelerometers were installed to obtain 12 error signals. Vibrations at three distinct frequencies induced by the pneumatic shakers were measured at these 12 locations using the accelerometers. Active vibration control was performed by driving the inertial actuators using a narrow-band Fx-LMS algorithm to reduce the measured error signals. As a result of the control, the vertical vibration at 24 Hz was successfully reduced by 10.95 dB.
4,000원
8.
2025.06
구독 인증기관 무료, 개인회원 유료
Aerial work platforms (AWPs) are specialized vehicles designed for tasks at elevated heights, and are widely used in various environments such as construction sites, road maintenance, and high-altitude operations. In this study, computational fluid dynamics (CFD) analysis was conducted to investigate the airflow field, drag force, and torque characteristics around an AWP. The simulation results showed that the overall airflow velocity decreased as it passed over the vehicle and boom, while it increased locally between the vehicle and the boom, and beneath the work platform. The drag force and torque acting on each component were highly sensitive to changes in boom angle due to variations in airflow. As the boom angle increased, the drag force increased by approximately 20 times, and the torque by up to 108 times. These findings provide fundamental data for establishing design criteria to enhance the structural stability and aerodynamic performance of aerial work platforms.
4,000원
9.
2025.06
구독 인증기관 무료, 개인회원 유료
In this study, the design of shock tower mounting, a type of shock absorber mounting for four-wheel drive vehicles, was addressed through structural analysis. In the case of existing shock tower mounting components, cracks occurred in the shock tower frame side weld joints, so the maximum stress should be reduced to extend the life of the designed components. Based on this, various design changes were performed on the shock tower mounting components, and the maximum stress generated through structural analysis of each design change model was compared. For the structural analysis, a load of 40,000 N was applied in the axial direction of the shock absorber, and the results were relatively analyzed and compared. As a result of the analysis of the shock tower mounting components through the design change, Case 3, a model that alleviated the stress concentration applied to the body mounting, increased the strength compared to the existing model, and the stress in the shock tower frame side weld joints was reduced by 16.3%.
4,000원
10.
2025.06
구독 인증기관 무료, 개인회원 유료
This study evaluates a lightweight authentication protocol for IoMT systems, revealing vulnerabilities like node cloning and insider threats. It proposes enhancements including PUFs, homomorphic encryption, and RBAC/ABAC. Optimized session management and lightweight cryptography are also suggested to improve security and resource use. Future research should explore quantum-resistant cryptography and AI-based adaptive security policies for enhanced resilience against evolving threats.
4,000원
11.
2025.06
구독 인증기관 무료, 개인회원 유료
In this study, in order to identify the vibration characteristics of the process control cabinet, as a basic study for evaluating the seismic performance of nuclear power plant structures, a cabinet vibration test equipment, sliding base, and measurement system were constructed. The reliability of the base was verified by utilizing ODS and phase data to determine how the cabinet deforms under seismic conditions. In addition, the cabinet was subjected to excitation frequencies from 8 Hz to 15 Hz in order to examine the changes in the natural frequency of the cabinet according to the two types of sliding base motion and the cabinet door open/close status. The vibration characteristics of the empty cabinet were investigated experimentally to examine the cabinet excitation characteristics and changes in natural frequency. Since the structural rigidity of the cabinet changes depending on the excitation conditions and door opening/closing, the natural frequency and response size of the cabinet change. Since the door opening is a condition that greatly amplifies the cabinet vibration response, it causes structural defects and greatly affects the changes in natural frequency.
4,000원
12.
2025.06
구독 인증기관 무료, 개인회원 유료
This study implements a high-precision camshaft profile grinding system by retrofitting the C-axis and X-axis structures of an existing cylindrical grinding machine and integrating CNC variable monitoring and control functions based on the manufacturer-provided Programming Package. The original inverter-driven C-axis was replaced with a servo motor to enable precise angular positioning, while a linear scale was additionally applied to the X-axis to establish a closed-loop system capable of high-precision infeed control. Changes in the grinding wheel diameter due to dressing are compensated by real-time monitoring of internal CNC variables, enabling regeneration of the profile grinding program to prevent degradation of form accuracy. Perfomance evaluation showed that the camshaft profile accuracy was maintained within ±4 μm, and the consistency of the profile was sustained within ±2.5 μm over repeated grinding cycles. This study presents a practical technological foundation for converting cylindrical grinding machines into profile grinders capable of precision machining of non-circular components such as camshafts.
4,000원
13.
2025.06
구독 인증기관 무료, 개인회원 유료
This study is a fundamental investigation aimed at applying HDPE(High-Density Polyethylene), a promising alternative to FRP(Fiber-Reinforced Plastic) commonly used in hull structures, to hulls and marine structures. HDPE is well-suited for marine environments due to its excellent durability, chemical resistance, light weight, and recyclability; however, reliable joining techniques for large-scale structures remain insufficient. This research analyzes the effect of extrusion-based throughput rate conditions on weld quality. BoP(Bead-on-Plate) welding experiments were conducted using HDPE welding wire under throughput rates ranging from 0.2 to 0.7 g/sec, evaluating variations in bead shape and weight. The results showed significant changes in bead dimensions according to throughput rate, suggesting that the findings can serve as a basis for deriving optimal conditions to ensure joint quality.
4,000원
14.
2025.06
구독 인증기관 무료, 개인회원 유료
This paper describes the use of approximation in Collaborative Optimization (CO) method, one of the Multidisciplinary Design Optimization (MDO) techniques. The approximation is used to model the result of a disciplinary design, optimal discrepancy function value, as a function of the interdisciplinary target variables passed from system level to the discipline. The optimal discrepancy function value is used to examine the interdisciplinary compatibility constraint (discrepancy function = 0) duringthe system level optimization. However, the peculiar shape of the compatibility constraint makes it difficult to exploit well–developed conventional approximation methods. This paper introduces the combination of neural network classification and kriging to resolve this problem. In addition, for the purpose of enhancing the accuracy of the approximation, the approximation is continuously updated using the information obtained from the system level optimization. This iterative process is continued until acceptable convergence is achieved.
4,000원
15.
2025.06
구독 인증기관 무료, 개인회원 유료
This study analyzes the feasibility of operating the E190-E2 aircraft at Ulleung Airport, which has a runway length of 1,200 meters. Using aircraft manufacturer data and PACE LAB under EASA standards, takeoff and landing performance were evaluated under various environmental conditions. Results indicate that with round-trip fuel tankering, the aircraft can carry up to 106 passengers at departure and 89 at arrival under wet runway conditions. If refueling is available at Ulleung Airport, the payload capacity can increase by approximately 10 passengers. A flight test conducted at Pohang Airport supported these findings. The study suggests that minor infrastructure improvements, such as refueling facilities and limited runway extension, would make E190-E2 operations at Ulleung Airport technically feasible.
4,000원
16.
2025.06
구독 인증기관 무료, 개인회원 유료
This study evaluates a lightweight authentication protocol for medical IoT systems, identifying vulnerabilities in encryption and key exchange. It proposes enhancements like ECIES and digital signatures, along with improved resource management and insider threat mitigation measures. These aim to strengthen security and protect medical data. Future research should explore quantum-resistant cryptography and AI-driven adaptive security.
4,000원
17.
2025.06
구독 인증기관 무료, 개인회원 유료
In this study, comparative combustion was performed in a 3-ton flue tube boiler for emulsified oil manufactured by using 15% water and approximately 1% carbide aqueous solution as an emulsifier in Bunker-C oil, and the characteristics of exhaust emissions were analyzed. As a result of performing comparative combustion under the same ambient environment and external conditions, the exhaust gas temperature decreased by approximately 3.93% from 183.76℃ for bunker-C to 176.52℃ for EM15, and the oxygen concentration increased by approximately 2.96% from 9.72% to 12.68% . Carbon dioxide decreased by approximately 2.3% from 8.49% for bunker-C to 6.19% for EM15, indicating that EM15 has a greenhouse gas reduction effect. When the standard oxygen concentration of 4% was applied, nitrogen oxides decreased by approximately 43.17% from 130.59 ppm for Bunker-C to 74.21 ppm for EM15, and sulfur oxides decreased by approximately 53.05% , confirming the excellent emission reduction characteristics of emulsified fuel oil. Therefore, it is expected that replacing emulsified fuel oil in boilers using Bunker-C oil will enable response to increasingly strengthened emission regulations.
4,000원
18.
2025.06
구독 인증기관 무료, 개인회원 유료
This study investigates the impact of both direct and indirect moisture ingress into an automotive engine control unit(ECU) on vehicle behavior and operational safety. Two experimental conditions were examined: exposure to an environment with 100% relative humidity(indirect ingress) and direct injection of 1.0~2.0 cc of water onto the ECU(direct ingress). The results showed no abnormal behavior under indirect moisture conditions. However, direct moisture ingress caused engine malfunctions, warning light activations, and irregular vehicle behavior. Notably, the vehicle's safety logic functioned as intended, resulting in engine shutdown without leading to unintended acceleration. These findings provide quantitative data valuable for future reliability assessments of ECUs and investigations into sudden unintended acceleration phenomena.
4,000원
19.
2025.06
구독 인증기관 무료, 개인회원 유료
This study numerically investigated thermal-structural characteristics of a liquefied hydrogen (LH) storage cylinder with varying inner pressures and surrounding temperatures. A thermal-structure coupled analysis approach was used to predict the thermal-structural characteristics of the LH storage cylinder. For the simulation, the shape of the LH storage cylinder was simplified using SUS 316L and Carbon Fiber Reinforced Plastic (CFRP) materials. As a result, the inner pressure was a crucial factor determining the structural property (i.e., stress and deformation) of the LH storage cylinder. The high pressure led to increased stress and deformation. Additionally, the surrounding temperature affected the stress and deformation of the LH storage cylinder. For example, at a high surrounding temperature, the temperature gradient along the cylinder increased, thereby causing the occurrence of thermal stress. However, this temperature effect on the stress was negligible compared to the effect of inner pressure. The findings of this study will provide meaningful data for improving the structural safety of LH storage systems.
4,000원
20.
2025.06
구독 인증기관 무료, 개인회원 유료
Since the small screen must be watched at the production and manufacturing site, when using the monitor without a separate paper for work and production instructions, it is necessary to look at the work instruction screen installed in a separate space to prevent work efficiency from deteriorating. It plays a role through a monitoring system using DPS or Barcode and RF-ID recognition as a safety device for installing heterogeneous parts in manufacturing and missing parts, but due to the high cost of introducing the system and difficulty in maintaining management, Visual POP is put into the production line. This study was produced by paying attention to the following five points in order to reduce the weight of these industrial Visual POPs and have global specifications and uses. These include instrument design and design, processing production, UI and control, application, thermal stress analysis and thermal analysis. In this study, for Models 1 and 2 that satisfy detailed specifications and performance indicators, instrument design and design were shown, and processing production is expressed by consideration.
4,000원
1
2
