In this paper, a new trend for improvement in semianalytical method based on scale boundaries in order to solve the 2D elastodynamic problems is provided. In this regard, only the boundaries of the problem domain discretization are by specific subparametric elements. Mapping functions are uses as a class of higherorder Lagrange polynomials, special shape functions, Gauss-LobattoLegendre numeric...

– The exact elastodynamic scattering theory is constructed to describe the spectral properties of twoand morecylindrical cavity systems, and compared to an elastodynamic generalization of the semi-classical Gutzwiller unstable periodic orbits formulas. In contrast to quantum mechanics, complex periodic orbits associated with the surface Rayleigh waves dominate the low-frequency spectrum, and al...

today there are different vibration isolators used in industries according to the weight and excitation frequency of the machines which have vibration. one of them is air spring which is in two types: convoluted air spring and membrane air spring. convoluted air springs are used to control vibrations in low frequency (usually lower than 10 hz) and the membrane ones are used in high frequency (u...

The simplest elasticity model of the foundation underlying a slender beam under flexure was conceived by Winkler, requiring local proportionality between soil reactions and deflection. Such an approach leads to well-posed elastostatic elastodynamic problems, but as highlighted Wieghardt, it provides elastic responses that are not technically significant for wide variety engineering applications...

background with increasing incidence of traumatic fractures, the use of orthopedic intervention such as traction has increased. inappropriate traction care may cause substantial morbidity and delay the patient rehabilitation. objectives this study was conducted to evaluate the quality of care for patients with traction in the orthopedic unit of kashan's shahid beheshti hospital, kashan, iran. p...