• 제목/요약/키워드: Durability Test

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도어트림 그립핸들 마찰이음 근본개선을 위한 내구 시험법 개발 및 개선연구 (Study on durability test method for improvement of door trim grip handle friction noise)

  • 김종수;나형현;조영빈
    • 한국음향학회지
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    • 제37권4호
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    • pp.233-241
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    • 2018
  • 본 논문에서는 기존에 없었던 도어트림 그립핸들에서 반복된 하중으로 인해 발생하는 소음을 사전에 검증할 수 있는 내구 시험법을 개발하고자 하였다. 시험 방법은 그립 핸들이 받는 하중 모드, 내구 횟수를 고려하여 개발하였으며, 시험 방법의 유효성을 확인하기 위해, 양산 초기 제품에 시험 법을 적용하여 필드클레임에서 발생한 도어트림 그립 핸들 소음을 재현하였다. 최종적으로, 현재 개발된 시험법을 통해서 후속 개발 제품의 소음 검출 및 개선하는 데 활용하고 있다.

피로수명 예측법을 이용한 각 도로가 차량의 내구성에 미치는 가혹도 평가 (Severity Test of Road Surface Profile by Using the Fatigue Life Prediction Method)

  • 정원욱;강성수
    • 한국자동차공학회논문집
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    • 제3권6호
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    • pp.154-161
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    • 1995
  • There are several kinds of driving conditions according to the characteristic of each vehicle diver. Automaker produces vehicle strong enough to satisfy this several driving conditions at the point of vehicle durability. In order to develop the car in a short period, Automaker engineer tests vehicle at serveral accelerated durability test roads. Before testing the vehicle durability, test engineer must know how much this test road severe than general field road which is composed of high way, city road, paved road and unpaved road. This paper suggests two types of road severity test method that is using relative fatigue life prediction method and using absolute fatigue life prediction method, and also present the merits and demerits of two test methods.

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고화매트의 내구성 향상을 위한 시스템 개선의 실험적 연구 (An Experimental Study on Solidifying Mat of System Improving for Durability Improving)

  • 홍성록;이정윤;김영삼;박헌일;조병영
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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    • pp.108-109
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    • 2014
  • The purpose of this study is to enhance durability of solidifying mat. solidifying mat excellent mechanical properties of geotextile. multi-layer coating system is applied to the mat and the chloride ions penetration resistance, chemical resistance, accelerated carbonation test were evaluated by testing the durability. Durability test results are as follows. chloride ions penetration resistance results are coated mat is approximately 70 % lower than plain. chemical resistance test results are coated mat no discoloration. accelerated carbonation test results are coated mat is approximately 90 % lower than the plain.

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Steering Control of the Autonomous Guided Vehicle Driving System for Durability Test

  • Jeong, Jong-Won;Lee, Young-Jin;Yoon, Kang-Sup;Lee, Man-Hyung
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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    • pp.104-104
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    • 2000
  • Among durability tests, the accelerated durability test has been widely used to evaluate the durability of vehicle structure and chassis pans in a shon period of time on the designed road which has severe surface conditions. However it increases the drivers fatigue mainly caused by the severe driving conditions. The drivers difficulty of maintaining constant speed and controlling the steering wheel reduces the reliability of test results. The durability test includes the position and distance sensing system for the recognition of the absolute and relative driving position, the driving control system for the control of whole driving circumstance, the emergency system for responding to system errors. AGVDS (Autonomous Guided Vehicle Driving System) was Proved to facilitate the development of now car projects. Therefore the AGVDS we propose will help make the fundamentals for all future traffic systems.

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에너지 활용 부품의 진동내구 평가기법 연구 (A study on the vibration durability test for the energy harvesting part of vehicle)

  • 주형준;김찬중;이기수
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2014년도 추계학술대회 논문집
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    • pp.587-588
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    • 2014
  • Studies that the vehicle exhaust system applied by the TEG(thermal electric generator) are actively in progress in order to improve the fuel efficiency of the vehicle. Vehicle exhaust system is on a poor vibration condition, it is susceptible to TEG. This paper is about the development of vibration durability test of TEG mounted on a vehicle exhaust system. Vehicle driving tests are performed to measure the vibration condition of the vehicle exhaust system. The vibration durability test mode of TEG is evaluated using equivalent vibration energy method. The vibration durability tests of TEG are performed using the multi-axial vibration simulation table.

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T-50 전기체 내구성시험 시험하중 설계기술 연구 (A Study on the Test Load Simulation Technique for T-50 Full Scale Durability Test)

  • 정재권;이기범;양명석;설창원
    • 한국항공우주학회지
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    • 제32권3호
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    • pp.82-87
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    • 2004
  • 항공기 구조 개발에 관련된 MlL-HDBK-1530 에는 구조 건전성을 확보하기 위한 요구사항이 기술되어있다. 기체 구조의 내구성 및 손상허용성은 요구항목 중의 하나로서 관련 규격서의 요구조건과 절차에 따라 해석 및 시험을 통하여 입증되어야 한다. 본 논문에서는 T-50 항공기 (고등 훈련기)의 안전성 및 내구성 평가를 위한 전기체 내구성 시험하중 설계에 대하여 기술하였다. 내구성 시험하중 설계는 대한민국 공군과 미군사규격서의 요구조건 및 절차에 따라 수행되었다. 실제 비행상태 구현을 위한 전기체 부유식 시험조립 기법과 비행대비행 하중 스펙트럼의 모든 하중을 정확하게 모사 할 수 있는 시험 하중 최적화 기법 및 6-자유도 평형기법을 개발하여 적용하였다. 개발된 기법은 향후 항공기 전기체 구조시험을 수행하는데 있어서 유용한 시험하중 설계 기법임을 확인하였다.

후드 오버슬램범퍼 조립 상태에 따른 점용접의 내구성능 영향 분석 (Analysis on Durability Performance of Spot Welding by the Status of Over-Slam Bumper in Hood System)

  • 이혁
    • 한국신뢰성학회지:신뢰성응용연구
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    • 제17권4호
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    • pp.273-279
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    • 2017
  • Purpose: Recently, Issues on security for vehicles are getting increased all around the world. Especially, hood panel needs to be thinner for the protection of pedestrians. But thinner panel makes durability get worse. So, it is needed to satisfy both of them. Methods: Durability effectiveness will be studied because properties and assembly allowance of over-slam bumper mostly affects durability of hood panel. Overlap of over-slam bumper can be made in production line and it can affect durability of spot welding in hood inner panel. Daguchi method is used to catch the condition in which load gets smaller and location, hardness and quantity of overlap are selected to be factors. Durability effectiveness is analyzed with the factors. Result: the mechanism that affects on spot welding is identified. The test was conducted in both open/close and driving condition and the relation between both conditions is analyzed. Conclusion: The test contributed to durability of hood panel with optimization of over-slam bumper.

견인 장치 사용 환경 다양화에 따른 차체 입력하중 분석 (Analysis of Load Input to Vehicle Body Due to Diversification of Environment of Towing Device)

  • 최재성
    • 한국신뢰성학회지:신뢰성응용연구
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    • 제18권1호
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    • pp.40-48
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    • 2018
  • Purpose: This research is to develop Trailer Durability Test of towing device, in order to cover usage conditions of bike type as well as general type trailer. With the diversification of leisure activities, the population that enjoys various sports and leisure has increased rapidly, and the number of vehicles equipped with camping trailers and bike carriers is also increasing steadily. The purpose of this study is to develop a durable vehicle that has no problem in various customer conditions. Methods: We measured the input load under various conditions of the user by attaching load cell to the body fixing part and towing ball of the towing device. The load in various modes was measured, and the difference between the trailer and the bike carrier type was compared and analyzed. Results: Due to the difference in fixing method and weight between the two types, the trailer has a large longitudinal force and the bike type has a large vertical force. Therefore, it is necessary to durability test method capable of satisfying all longitudinal force and vertical force. Conclusion: We improved the durability test of the towing device by changing the test surface. The new mode has made it possible to shorten the durability test schedule by increasing test efficiency.

엔진내구시험을 통한 Valve Train 수명예측에 관한 연구 (2) (A Study of Valve-train Life Time Estimate in Engine Durability Test (2))

  • 김재진;이환희;명광희;민병두
    • 한국자동차공학회논문집
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    • 제22권3호
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    • pp.75-80
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    • 2014
  • In previous study, make an attempt to estimate exhaust valve seat and seat-ring wear acceleration factor for engine durability test with measuring and consideration of wear mechanism. But found abnormal initial wear rate in exhaust valve seat-ring. And have to improve exhaust valve seat-ring wear rate for reliability reason, because next GDI/Turbo engine is based on this engine and GDI/Turbo engine have higher combustion pressure and higher thermal load. In this study, Trying to find the cause of abnormal wear factor, improve valve-train durability by change specification & design of parts and verify variant parts for improving durability of valve-train. And then I would like to propose a design guide line of valve-train system in a reliability point of view, besides make a complement of previous study.

자동변속기 구성품의 가속수명평가 방법에 관한 연구 (A Study on Accelerated Life Evaluation Method of Component for Automatic Transmission)

  • 임홍수;조병철;김연규;이희용;김재훈
    • 한국자동차공학회논문집
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    • 제25권2호
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    • pp.250-256
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    • 2017
  • Automatic transmission(A/T) is one of a car's core components. The durability of A/T has an effect on the durability of the car. The input shaft of A/T passes the power directly from the engine, so the durability of the input shaft for A/T is likewise vital. In this study, the test method of the input shaft is considered and the load spectrum of A/T is analyzed to secure durability of the input shaft. The shape parameter, T-N curve of the input shaft torsional fatigue test are obtained for life evaluation and analysis. Results of this study can be used to get the basic background of the durability test for A/T components.