• Title/Summary/Keyword: Vibration Endurance Test

Search Result 38, Processing Time 0.032 seconds

Estimation of the Vibration Endurance Characteristics of Air Cleaner Insulators for Vehicles (차량용 에어클리너 인슐레이터의 진동 내구성 평가)

  • Kim Jung Heon;Kim Seockhyun
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.14 no.9 s.90
    • /
    • pp.897-902
    • /
    • 2004
  • In this paper, a vibration endurance test is performed on rubber insulators used for vehicle air cleaners. Based on the test results, the endurance characteristics depending on the type and the material of the insulators are estimated. The frequency response characteristics of the air cleaner system including the insulator are investigated to identify the cause of wear and failure of the insulator. New insulator models with improved endurance characteristics are proposed and tested. Test results show that the vibration endurance property of the insulator is strongly dependent on the frequency response characteristics of the air cleaner system as well as the deformed shape of the insulator.

Estimation of the Vibration Endurance Characteristics of Air Cleaner Insulators for Vehicle (차량용 에어클리너 인슐레이터의 진동 내구성 평가)

  • 김정헌;김석현
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2004.05a
    • /
    • pp.931-936
    • /
    • 2004
  • In this paper, vibration endurance test is carried out on rubber insulators used fur vehicle air cleaners. Based on the test results, endurance characteristics depending on type and material of the insulators are estimated. Frequency response characteristics of the air cleaner system are investigated to identify the cause of wear and failure in the insulators occurred during the endurance test. New insulator models with improved endurance characteristics are proposed by changing the frequency response property of the air cleaner system.

  • PDF

A Study on Endurance Improvement of Electrical Equipment according to Vibration Environment (진동환경에 따른 전기설비의 내구성 향상에 관한 연구)

  • Park, Keun-Seok;Shim, Jae-Myung;Lee, Dae-Dong
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.63 no.8
    • /
    • pp.1146-1151
    • /
    • 2014
  • The equipment in ships and railway vehicles are continuously exposed to vibration, and its durability is very important. Therefore, consumers require the verification of the performance of equipment via standardized tests under the given environments to improve and stabilize the performance. In this study, a durability improvement and stabilization plan was proposed, which included the exploratory vibration test, variable frequency test and endurance test for the electrical equipment according to the vibration environment. It is expected that this study results will improve the technological competitive power of the ship and railway-related manufacturers and contribute to the equipment development and export.

An Experimental Study onthe Endurance Characteristics of the Dynamic Absorber for Vibration Reduction of 4WD Vehicle's Powertrain (4륜구동 자동차의 동력기관에서 진동저감을 위한 동흡진기의 진동내구에 대한 실험적 연구)

  • 사종성;김찬묵
    • Journal of KSNVE
    • /
    • v.9 no.6
    • /
    • pp.1166-1172
    • /
    • 1999
  • This paper is the experimental study on the endurance characteristics of the dynamic absorber for the vibration reduction of the 4WD(4 Wheel drive) vehicle's powertrain. Employing the vehicle speed, natural frequencies of damper, modal testing results of powertrain and the weighting factor, the improved endurance test conditions are suggested to enlarge the life time of the dynamic absorber. The test results show that the life time of the dynamic absorber for Z-direction(up and down) has no problems, but the characteristics of X-direction (fore and after) will be sensitive to endurance characteristics of dynamic absorber.

  • PDF

Endurance test procedure and validation of Multipurpose tactical vehicle (다목적 전술차량의 주행내구도 시험 절차 및 검증)

  • Jeong, Eui-Bong;Kang, Dong-Suk;Choi, Ji-Ho;Kim, Han-Shang;Choi, Man-Sick
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2014.10a
    • /
    • pp.256-261
    • /
    • 2014
  • Endurance test procedures of multipurpose tactical vehicle is constructed by comparing the Korea defence standard and TOP-2-2-506. The plan was to make the best reflect the operational environment and the actual production purposes. Endurance test of multipurpose tactical vehicle more stringent than the existing other military vehicles validation procedures. But the test plan, it is possible to reduce the cost and schedule of long verification that occurs because of the Endurance test. Through a comparison of the dynamic characteristic analysis, change of test center was to ensure the reliability and validity.

  • PDF

Compatibility test of a non-instrumented irradiation test capsule for the HANARO test reactor (환형소결체 하나로 조사시험용 무계장 캡슐의 연구로 설치 적합성시험)

  • Lee, Kang-Hee;Kim, Dae-Ho;Chun, Tae-Hyun;Kim, Hyung-Kyu
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2008.11a
    • /
    • pp.226-229
    • /
    • 2008
  • To investigate an in-pile behavior of the newly developed DUO fuel pellet, the irradiation test will be carried out in the domestic test reactor. Irradiation test capsule for the HANARO reactor, which is a specially designed equipment used for material, irradiation and creep test, must satisfy the operational requirement on the hydraulic characteristics and structural integrity. In this study, a pressure drop, a flow-induced vibration and a short-term endurance test for the newly developed non-instrumented test capsule were carried out using FIVPET as a out-pile evaluation test. The test results show that the new test rig satisfy the HANARO operational requirement with sufficient margin.

  • PDF

An Experimental Study on the Vibration Reduction of the 4WD Vehicle by the Engine Mounting Conditions (엔진장착조건에 따른 4WD 자동차의 진동저감에 대한 실험적 연구)

  • Sa, J.S.;Kim, K.S.
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.2 no.2
    • /
    • pp.24-32
    • /
    • 1994
  • This paper is the experimental study on the vibration reduction of the 4WD vehicle through the change of the engine mounting conditions.(4 stroke diesel engine) The engine mounting conditions are changed to reduce the transmitted vibrations of the engine to the frame at the idle speed. Under the assumption that the Powertrain(Engine Transmission and Transfer Case) is a rigid body, the inertia properties of the powertrain are obtained by experimental modal analysis. And then the changed mounting conditions are studied by the decoupled vibration theory and analytical model of six degree of freedom. Though the mounting conditions are changed to improve the vibration isolation at idle speed, the vibration and the interior noise of the vehicle are reduced significantly at driving speed as well as idle speed. From the indirect endurance test of the front engine mounts, the changed mounting conditions are desirable to endurance as well as vibration reduction of the 4WD vehicle.

  • PDF

Effect of Active Vibro-Swing Exercise of Upper Limb on Physical Capacity and Vasomotor for Middle Aged Women (상지 능동 진동운동이 중년여성의 신체능력 및 혈관운동성에 미치는 영향)

  • Lee, Hyun Ju;Yim, Hyun Seung;Tae, Ki Sik
    • Journal of Biomedical Engineering Research
    • /
    • v.41 no.6
    • /
    • pp.264-271
    • /
    • 2020
  • The purpose of this study was to investigate the effects of active vibration exercise of upper limb on physical capacity index (endurance, grip strength, balance, and flexibility) and vasomotor index (capillary length and body surface temperature) in middle aged women. 20 participants randomly divided into two groups: vibro-swing exercise (VSE) and non vibro-swing exercise (NVSE). Subjects in each group measured the 30 second arm curl test, hand dynamometer, one leg standing test, back scratch test, nail fold capillary microscope (NFM), and digital infrared thermal imaging (DITI) before and after exercise. The results showed that active vibration exercise of upper limb with vibro-swing equipment increased the endurance, balance ability, and the capillary length. In addition, changes in body temperature immediately after exercise were predicted to affect vasomotor. Active vibration exercise of upper limb has the advantage of being able to exercise anywhere regardless of the location by inducing different frequency changes in movement of various ranges and velocity. For this reason, the combination of vibration and active movement can be expected the physiological effects when producing exercise programs for middle aged women.

Utilizing virtual vibration tests to optimize physical endurance tests

  • Kihm, Frederic
    • Advances in aircraft and spacecraft science
    • /
    • v.5 no.2
    • /
    • pp.239-249
    • /
    • 2018
  • Physical tests are performed at various stages of the development cycle of a product, from prototype validation to product qualification. Although costly, there are growing demands for qualification tests like endurance vibration testing to be more representative of the real world. At the same time there are growing demands to assess the durability of these items based on FEA simulation. In this paper, we will explain how to set up a CAE-based test and how to correlate the results with some physical measurements. Specific assumptions will be explained and some advantages of using virtual tests will be highlighted such as the reduction of the number of prototypes needed, investigations on failures, evaluation of the level of reliability via sensitivity analysis, evaluation of the margins are at the end of a successful test. This presentation will therefore focus on explaining and showing how virtual tests can enrich the exploitation of physical tests.

Determining Vibration Qualification Level for the Equipment Loaded Inside a Tracked Vehicle (궤도차량 탑재장비의 진동 내구성 평가를 위한 시험수준 결정방법 연구)

  • Choi, Chang-Ha
    • Journal of Environmental Impact Assessment
    • /
    • v.4 no.2
    • /
    • pp.123-130
    • /
    • 1995
  • The equipment composed of many complicated electronic stuffs undergoes diverse stresses caused by mechanical vibrations during its service. Thus, to ensure its proper operation in the field a simulated vibration test has to be carried out in the laboratory with the Vibration Qualification Level, the test specification, which can include the real environment. In this paper we intent to deal with method and procedure for determining the Vibration Qualification Level so as to estimate the vibration-endurance for the equipment precisely.

  • PDF