OSCILLATIONS OF SPHERICAL-CYLINDRICAL COMBINED SHELL UNDER THE ACTION OF A PLANE SHOCK WAVE

Abstract

The study of shells with complex shapes, especially combined spherical and cylindrical shells, has recently become an important and urgent task. In addition, when operational loads are applied to such combined shell structures, vibration problems inevitably arise. It should be noted that one of the main problems of such studies is the determination of correct loads on complex shell structures under the action of fast impact loads. The quality of the final result depends on the correct solution of both problems, which actually belong to two different directions: computational fluid dynamics and computational solid dynamics. The interaction of a shock wave with a steep front and a pressure jump ΔP = 1 · 106 with with a spherical-cylindrical combined shell of cylinder-half-sphere type (radius of cylindrical and spherical parts 324 mm) was studied. This class of studies was carried out using different approaches to solving related problems of solid mechanics and computational fluid dynamics. The value of pressure parameters (in the form of diffraction pressure) at rolling of a shock wave on a shell was obtained. The vibrational processes of a complex shell under the action of dynamic loading are analyzed.