http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
주행속도와 제동력 변화에 의한 디스크 브레이크의 스퀼 소음에 미치는 영향
심동혁(DongHyouk Shim),김대열(DaeYeol Kim),고석훈(SeokHoon Ko) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Brake noise is classified according to frequency territory: judder, groan and squeal. Squeal noise of disk brake is a noise and self excited vibration with frequency of 1~10Khz caused by the friction force between the disk and the pad of the automobile. Passengers in a vehicle feel uncomfortable. It causes unstable characteristic to the brake system when you try to stop the vehicle. Thus this study aims to find in which conditions the vehicles are stable during the braking hour and find ways to decrease a squeal noise and the vibration by measuring various factors including squeal noise and self excited vibration between the pad and disk brake system during the braking hour. From the result the countermeasure for a squeal noise and a vibration decrease is established. Also the analyzed data is found to be useful and can be applied to the actual brake model.
불법 과속방지턱에서 충돌 속도에 따른 로워암의 응력과 변형률 비교분석
김정훈(JeongHoon Kim),심동혁(DongHyouk Shim),최명진(MyoungJin Choi) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Excessive vibration caused by thought surface of the rod or a protrusion is called harshness. initially the tire receives the impact that is magnified by the axis if the car or suspension system. and transfers the impact to the driver. When the tires of a car clashes into a sleeping police with full speed. There comes an intense shock that gives and strain of a car. With matlab program, we model and analyze stress and strain of a lower arm, and measure maximum elongation and maximum tensile stress that are delivered to the car by its running speed. It is proven exposure the repeated load changes the form of the lower arm of a car and shortens its durability.
김태구(Taegu Kim),윤나혜(Nahae Yun),김연주(YeonJoo Kim),박인철(Inchul Park),심동혁(Donghyouk Shim) 한국산업경영시스템학회 2022 한국산업경영시스템학회지 Vol.45 No.1
Development of a long-range artillery intercept system to counter the threat of enemy long-range artillery is in progress. This intercept system is a complex combination of several components. In addition, the ability to engage simultaneously is emphasized due to the characteristic of having to respond to numerous enemy bullets. In this study, the performance according to the arrangement of the detection asset and missile launchers, which are key components of the system, is analyzed. A simulation experiment was performed assuming the enemy attack at various azimuth and launch angles. As a result of the analysis, the radar seems to provide sufficient detection capability in any situation, but in the case of the launcher, the effect of the enemy s launch angle can be critical. It is recommended to place both radar and launchers behind the protection target.