Abstract
In order to obtain the shockwave load simplified algorithm model for the semiarmored projectile internal explosion in the cabin, this research made use of AUTODYN to provide a numerical modeling method for explosion in the cabin and verified the accuracy of the method via the experiment. Internal explosion simulation calculation was conducted on the operating condition numerical model with different cabin structural dimensions and different explosive loads. The cabin internal explosion space was divided into the noncorner central area, near-wall area, two-sided corner area, and three-sided corner area. Through regression of the abovementioned calculation results, an engineering model to calculate the shockwave load was obtained. It is hoped that the model can offer some references to the antiexplosion design for the ship cabin and for damage assessment of the internal explosion.
Highlights
An explosion happening in an enclosed or semienclosed space under limited boundary conditions is defined as an internal explosion
Different from the explosion happening on the free field, the high-temperature, high-pressure products cannot be diffused externally and immediately [1,2,3]. e shock wave might go back and forth between the structural walls
Penneiter et al [7] studied different reflection forms of shock waves caused by explosive explosion in an enclosed space and at typical position. e simulation calculation results showed a good agreement with the experiment results, and they described distribution characteristics of the wall surface shock wave
Summary
An explosion happening in an enclosed or semienclosed space under limited boundary conditions is defined as an internal explosion. Shock and Vibration numerical simulation and analyzed its distribution rules and evolution process They conducted an explosive explosion experiment in a square enclosed space to study the evolution rules of the quasistatic pressure, compare them with the results given by the classical empirical formula, and put forward factors influencing the quasistatic pressure evolution, which laid a solid foundation for follow-up research. Li [17] analyzed convergence of the shock wave at the corner and preliminarily identified the high-pressure area of the corner through a series of simulation calculation According to their finding, the cabin length-width ratio was a main factor that affected the highpressure scope of the corner, and their research casted light on the functional correlation between the high-pressure scope and the structural dimensions. An engineering model which could be used to work out the shockwave load was established, which could provide data support and basis for the warhead design and the cabin target protective design
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
