DOI QR코드

DOI QR Code

온도 측정과 분석을 통한 40 mm 장축공동실린더의 열적특성 고찰

Thermal Property Analysis of 40 mm Long Hollow Cylinders Though Measurements and Analysis of Transient Temperatures

  • 발행 : 2006.08.01

초록

A simple and effective analysis method is presented for gaining a complete transient temperatures on the internal and external surfaces of a 40 mm gun tube subjected to a series of rapid firings. Two series of temperature data for both Hs and As were measured by using two rapid response k-type surface thermocouples near the firing origin and the muzzle. With other available temperature data, patterns of temperature variations of the gun tube as a function of time variable were driven through complete evaluations of the data. It is found that overall temperature gradients which increase exponentially toward saturation temperature, actually consist of a series of linear temperature gradients corresponding to the firing sequences. Under the similar firing sequences, patterns of temperature variations fur both the surface temperatures near the chamber and those near the muzzle were found to have linear temperature gradients with different values and the same response frequencies, i.e. they had peaks and lows in temperatures at the same time. The resultant complete temperature data can be used as the fundamental bases for analysis of thermoelastic properties of the materials such as thermal strain and stress, and f3r the prediction of cannon tube life-time through calculation of wear rate.

키워드

참고문헌

  1. S. T. Stasynk, V. I. Gromovjk and A. L. Bichuya, 'Thermal-stress Analysis of Hollow Cylinder with Temperarure-dependent,' Acad. of Sci. of the Ukrainian SSR, LVOV USSR, Vol. 11, No. 1, pp. 41-43, Jan. 1979
  2. S. T. Stasynk, V. I. Gromovjk and A. L. Bichuya, 'Thermal-stress Analysis of Hollow Cylinder with Temperarure-dependent,' Translated in: Strength of Materials, Vol. 11, No.1, pp. 50-52, Sep. 1979 https://doi.org/10.1007/BF00806229
  3. H. Vollbrecht, 'Stress in Cylindrical and Spherical Walls Subjected to Internal Pressure and Stationary Heat Flow,' Verfahrenstechnik Vol. 8, pp. 109-12, 1974
  4. S. A. R. Naga, 'Optimum working Conditions in Thick Walled Cylinders,' J. Eng. Mater. Technol. Trans. ASME, Vol. 108, pp. 374-7, 1986 https://doi.org/10.1115/1.3225897
  5. V. N. Zukhova and P. G Pimshtein, 'Thermally Stressed State of a Laminnated Cylinder exposed to Internal Pressure and Steady-state External Heating,' Sov. Appl. Mech., Vol. 25, pp. 808-13, 1990 https://doi.org/10.1007/BF00887646
  6. T. Yoitiro and N. Naotake, 'The Effects of Dynamical treatment of Thermal Stress on a Circular Region due to Continuous Point Heat Source,' Int. Journal of Eng. Sci., Vol. 12,pp.261-271, 1974 https://doi.org/10.1016/0020-7225(74)90005-6
  7. X. Wang, 'Thermal Shock in a Hollow Cylinder Caused by Rapid Arbitrary Heating,' J. of Sound and Vibration, Vol. 183, No.5, pp. 899-906, 1995
  8. I. A. Johnston, 'Understanding and Predicting Gun Barrel Erosion,' DSTO- TR-1757, Weapons Systems Division, DOD, Australian Government, Aug., 2005
  9. C. E. Moeller and A. J. Bossert, 'Measurement of Transient Bore-Surface temperatures in 7.62 mm Gun Tubes,' R-RR-1-81-73, Rock Island Arsenal, Nov. 1973
  10. C. W. Nelson and J. R. Ward, 'Calculation of Heat Transfer to the Gun Barrel Wall,' ARBRL-MR-03094, USA Ballistic Research Laboratory, Mar. 1981
  11. http://www.navweaps.com/Weapons/WNSweden_4 cm-70_m 1948.htm
  12. D. Y. Chung and M. Oh, 'New Empirical Method to Enhance the Accuracy in the Erosion Prediction of Cannon Tube,' Wear, Vol. 255, pp. 98-101, 2003 https://doi.org/10.1016/S0043-1648(03)00107-8
  13. J. Moffat, 'Complexity Theory,' Sept., 2003, CCRP