The analysis of a new three-dimensional finite element for the simulation of elastic-dynamic properties of the gas
A new three-dimensional finite element for the simulation of elastic-dynamic properties of the gas is considered. Analytical expressions for calculation of new finite element stiffness matrix elements are obtained. An experimental study of a sound pressure amplitude distribution along the acoustic interferometer is carried out. It is demonstrated that one able to use the isotropic finite element to describe elastic and dynamic properties of the gas if the physical constants of the element are defined by obtained formula. This gives a possibility to use the resources of programs implementing the finite element method to solve the problems of propagation and interaction with obstacles of elastic waves.