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A Study on Cross Member Strength Improvement of Korean Light Tactical Vehicle

한국형 전술차량 크로스멤버 강도개선에 관한 연구

  • Kim, Sung-Gon (Land-system Center, Defense Agency for Technology and Quality(DTaQ)) ;
  • Kim, Sun-Jin (Land-system Center, Defense Agency for Technology and Quality(DTaQ)) ;
  • Shin, Cheol-Ho (Land-system Center, Defense Agency for Technology and Quality(DTaQ)) ;
  • Kang, Tae-Woo (Land-system Center, Defense Agency for Technology and Quality(DTaQ))
  • Received : 2019.08.08
  • Accepted : 2019.12.06
  • Published : 2019.12.31

Abstract

The chassis of the Korean light tactical vehicle adopts a frame-on-body structure that uses lightweight design technology in terms of equipment operating characteristics. Military vehicles are operated in much harsher conditions compared to civilian vehicles, including mountainous terrain, especially steep slopes. Due to this characteristic, frame-welded cracks were found on some military vehicles. Therefore, in this paper, road damage analysis was conducted by identifying various roads including the military unit's road. The result confirmed that the operating environment of some military units' tactical road was much harsher than the endurance road test condition. A solution was derived through defect analysis, design review, and actual vehicle driving test. This study can be used as a reference by suggesting the development direction for the durability test of a new vehicle.

한국형 전술차량(KLTV)의 섀시는 장비 운용 특성상 경량화 설계기술을 적용한 프레임 온 바디 구조를 적용하고 있다. 군용차량은 민수차량 대비 가혹한 도로 환경에서 사용되고 있으며, 특히 경사가 가파른 산악지형에서 운용되는 경우가 많다. 이러한 장비 운용 특성으로 인해 일부 전방부대 차량에서 프레임을 구성하는 크로스멤버 용접부위에 균열이 확인되었다. 이에 본 논문에서는 균열이 발생된 부대를 포함한 다양한 운용 도로 환경 파악을 통해 노면 가혹도 분석을 실시하였다. 그 결과 일부 부대의 전술도로는 차량 개발 시 내구도 주행시험을 실시한 도로보다 약 1.6배 이상 훨씬 가혹한 조건임을 확인하였다. 또한 전술차량 프레임에 대한 설계 검토 및 고품 분석을 통해 용접부위 균열 발생 근본원인을 파악하고, 설계 및 공정개선 방안을 도출하였다. 제안된 개선안은 실차 적용을 통한 검증시험으로 효과성을 확인하였다. 아울러 내구도 주행시험에 대한 발전방향을 제시함으로써 향후 유사 차량 개발 시 참고자료로 활용할 수 있도록 하였다.

Keywords

References

  1. W. P. Ha, H. W. Shin, "A Study on the Structural Optimization of the Chassis Frame of the 4 Wheel Drive Vehicle", Spring Conference, Transactions of KSAE, pp. 177-182, Jun. 1997.
  2. E. B. Jung, D. S. Kang, J. H. Choi, H. S. Kim, M. S. Choi, "Endurance test procedure and validation of Multipurpose tactical vehicle", Fall Conference, Korean Society for Noise and Vibration Engineering, pp. 256-261, Oct. 2014.
  3. K. H. Suh, H. V. Lim, B. G. Song, C. S. Ahn, "Virtual Fatigue Analysis of a Small-sized Military Truck Considering Actual Driving Modes", Transactions of KSAE, Vol.16, No.4, pp. 120-127, Jul. 2008.
  4. K. J. Kim, Y. H. Lee, D. S. Bae, C. W. Sung, Y. N. Baik, I. S. Sohn, "Hydro-forming and Simulation of Cross member Parts for Automotive Engine Cradle", Transactions of KSAE, Vol.17, No.2, pp. 98-103, Mar. 2009.
  5. M. S. Lee, J. J. Lee, K. P. Kang, J. H. Lee, H. G. Kim, L. K. Kwac, "Study on the structural properties for the shape of special equipped vehicles cross member", Spring Conference, Transactions of KSAE, pp. 110-112, May. 2015.
  6. K. H. Suh, B. G. Song, "Light-weight Design of a Korean Light Tactical Vehicle Using Optimization Technique", Transactions of KSAE, Vol.23, No.3, pp. 336-343, May, 2015. DOI: http://dx.doi.org/10.7467/KSAE.2015.23.3.336
  7. D. H. Eom, "A Study on the Improvement of the Endurance Testing Standard for Combat Vehicle", Korea Association of Defense Industry Studies, Vol.20, No.2, pp. 63-77, Dec. 2013.
  8. S. J. Lee, J. B. Park, N. C. Park, J. H. Lee, E. B. Jeong, H. S. Kim, "Vibration reduction of military vehicle frame with using structural dynamic characteristics analysis", Fall Conference, Korean Society for Noise and Vibration Engineering, pp. 281-284, Oct. 2014.
  9. W. P. Ha, H. W. Shin, "A Study on the Structural Optimization of the Chassis Frame of the 4 Wheel Drive Vehicle", Spring Conference, The Korean Society of Automotive Engineers, pp. 177-182, Jun. 1997.
  10. S. G. Youn, S. D. Na, Y. J. Kim, J. H. Lee, W. S. You, "Multibody Vehicle Model of a Military Vehicle for Durability Analysis", Spring & Fall Conference, The Korean Society of Mechanical Engineers, pp. 736-738, Nov. 2015.
  11. K. H. Suh, B. G. Song, H. E. Yoon, "Relative Road Damage Analysis with Driving Modes of a Military Vehicle", Transactions of KSAE, Vol.24, No.2, pp. 225-231, Mar. 2016. DOI: http://dx.doi.org/10.7467/KSAE.2016.24.2.225