Numerical Simulation on the Spallation of a Steel Cylindrical Shell Imploded under Slipping Detonation
-
摘要: Иванов等发表了滑移爆轰作用下内爆柱形钢壳层裂实验的回收试件测量结果,也给出了相应的数值模拟结果,但两者的差别较大。本文利用损伤度函数方法,对上述实验做了数值研究,所得到的回收试件尺寸数值结果与Иванов实验结果十分相符。这说明,损伤度函数方法对研究动态断裂问题有一定的普适性。本文还对Иванов实验的柱形钢壳内爆运动过程进行了数值模拟,讨论了临界损伤度c取值对断裂面位置、钢层运动轨迹及钢壳运动速度历史的影响,指出了在分析界面不稳定性问题时要注意c取值的影响。Abstract: The spallation experiment of a steel cylindrical shell imploded under slipping detonation was reported by Иванов et al., but the measured and calculated results, showed in that paper, are not in accord very well in values. In this paper, we utilized the method of damage-level function to carry out the numerical studies for the above experiment. The calculated spall locations are quite in accord with that of the Ивановs experiment. It is illustrated that the method of damage-level function we adopted has a certain universal applicability for studying the dynamic fracture problems. The implosion processes of the steel cylindrical shell used in the Ивановs experiments were also analyzed numerically in this paper. The influences of the critical damage-level c values adopted on the spall locations, the implosion trajectories, and the shell velocity histories were discussed, and the importance of reasonable selection of c value for analyzing the interface-instability problems was also illustrated.
-
Иванов А Г, Софронов В Н, Тюнькин Е С. ПМТФ, 1984, (3): 125. Иванов А Г, И Др. ПМТФ, 1983, (1): 112. Tarver C M, Maiden D E. in: Shock Waves in Compressed Matter-1987. Edited by Schmidt S C, Holmes N C. Elsevier Science Publisher, 1988: 363. Cagliostro D J, et al. ibid, 367. 陈大年, 王德生, 马松合, 等. 爆炸与冲击, 1987, 3(1): 27. Steinberg D J, Sharp R W. J Appl Phys, 1981, 52(8): 5072. 封加波, 经福谦, 苏林祥, 等. 高压物理学报, 1988, 2(2): 97. 董玉斌, 张万甲, 经福谦, 等. 高压物理学报, 1988, 2(4): 305. Степанов Г В. Проблелы Прочносмц, 1980, (10): 48. Grady D E. Appl Phys Lett, 1981, 38(10): 825. 钱学森. 徐华舫, 译. 气体动力学诸方程. 北京: 科学出版社, 1966: 11. Mader C L. LA-3678, 1967. 里奇特迈尔R D. 何旭初, 等译. 初值问题的差分方法. 北京: 科学出版社, 1966: 186. An unpublished report. Institute of Applied Physics and Computational Mathematics. Wilkins M L. In: Methods in Computational Physics. Edited by Alder B, et al. New York and London: Academic Press, 1964, 3: 211. 德列明A H, 萨夫罗夫С Д,特罗菲莫夫B C, 等. 沈金华, 等译. 凝聚介质中的爆轰波. 北京: 原子能出版社, 1986: 119. 饭田修一, 等合编. 张质贤, 等译. 物理学常用数表. 北京: 科学出版社, 1979: 77, 93. Иванов А Г. ПМТФ, 1986, (1): 146. Swegle J W, Grady D E. J Appl Phys, 1985, 58(2): 692. Hopson J W. In: Los Alamos Shock Wave Profile Data. Edited by Morris C E. University of California Press, 1982: 118. 张万甲. 第四届全国高压学术讨论会缩编文集; 高压物理学报, 1987, (3): 62. Taylor G. Proc Roy Soc, 1950, 201(1065): 192.
点击查看大图
计量
- 文章访问数: 7285
- HTML全文浏览量: 313
- PDF下载量: 607