The research focuses on the dynamic axisymmetric task for a round bi-morph structure consisting of a metal support plate and a piezoceramic axially polarized plate. Its bending oscillations are carried out because of the actions of mechanical load (normal stresses) on its end surface. which is an arbitrary time and radial coordinate function. The rigid and hinged support of the plate ... https://halohealthcarers.shop/product-category/shampoo/