Numerical research of the unsteady interaction of a round layered plate with the surface of liquid
Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
Object: the object of the research is dynamic characteristics of the three-layer round symmetric plate with isotropic filler.
Topic: the research of impact interaction of three-layer round symmetric plate with isotropic filler.
Aim: to examine the influence of various factors on the dynamic characteristics of a three-layer round symmetric plate with isotropic filler during its vertical fall on liquid.
Research method: dynamic characteristics of a three-layer round symmetric plate with isotropic filler were numerically investigated in the software complex ANSYS AUTODYN, the permitting equations are equations of conservation of energy, momentum and mass. The solution is carried out by explicit method. The task is placed in the axisymmetric formulation of coherent, i.e. equations for plates and liquid are solved simultaneously. The obtained results are processed in software complex MathCad 14.
Results: as a result of the work there are obtained the dynamic characteristics of a three-layer round symmetric plate with isotropic filler when it hits the water with different initial velocity of interaction taking into account the gravitational forces, the air gap and without.
Conclusions: the numerical experiment without the air gap shows that the dependence of hydrostatic pressure from the initial speed is linear. The effect of air gap causes oscillation plate and the surface of the water, which leads to the uneven of their interaction and significantly affects the value of the maximal pressure, however, with the increasing speed of interaction the effect of air gap is reduced. Stresses in the filler are in ten times less than stress in the carrier layers, which allows to use more light and less durable materials.
Keywords:impact, round plat, interaction with liquid, numerical simulation
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