Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Experimental Study on the Dynamic Characteristics of a Missile Structure Depending on Fastening Method

체결 방식에 따른 유도탄의 동적 특성에 관한 실험적 연구

  • Jeon, Ho-Chan (The 1st Research and Development Institute, Agency for Defense Development) ;
  • Song, Ohseop (School of Mechanical Engineering, Chungnam National University)
  • 전호찬 (국방과학연구소 제1기술연구본부) ;
  • 송오섭 (충남대학교 기계공학부)
  • Received : 2019.04.11
  • Accepted : 2019.06.07
  • Published : 2019.08.05
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Abstract

In order to design and manufacture structures such as a guided missile, assembly process with fastener is an essential method of fabrication. In this study, the dynamic characteristics of a cylindrical structure with bolted joints were studied using experimental methods. The change of the natural frequency of the structure with the change of the fastening method and the tightening torque were measured by the test and the finite element analysis was performed using the stiffness model of the fastening part according to the fastening method and compared with the test results.

Keywords

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Fig. 1. Configuration of test specimen

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Fig. 2. 4 Types of assembly configuration for test specimen

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Fig. 3. Test specimen and accelerometer

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Fig. 4. Vibration test setup

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Fig. 5. Test results of tension type specimen

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Fig. 6. Test results of shear type specimen

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Fig. 7. Comparison of frequencies for different fastening types

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Fig. 8. Shape comparison of test specimen and FE model using thin layer element

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Fig. 9. Cross section of bolt assembly part

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Fig. 10. Finite element model

Table 1. Natural frequency and reduction rate

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Table 2. Results of FEM analysis for test specimen

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Table 3. Comparison of experimental and FEM results

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References

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  2. Jeong Kim, Joo-Cheol Yoon and Beom-Soo Kang, “Finite Element Analysis and Modeling of Structure with Bolted Joints,” Applied Mathematical Modelling, Vol. 31, No. 5, pp. 895-911, 2007. https://doi.org/10.1016/j.apm.2006.03.020
  3. C. S. Desai, M. M. Zaman and J. G. Lightner, “Thin-Layer Element for Interfaces and Joints,” International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 8, No. 1, pp. 19-43, 1984. https://doi.org/10.1002/nag.1610080103
  4. X. Y. Yao, J. J. Wang and X. Zhai, "Thin-Layer Element Modeling of Aero-Engine Bolted Joints," Internaltional Conference on Advanced Materials and Structural Engineering, pp. 477-482, 2015.
  5. Richard G. Budynas and J. Keith Nishett, "Shigley's Mechanical Engineering Design", Mc Graw Hill, US, pp. 416-424, 2015.