A simple formula was recently proposed by Williams @J. Acoust. Soc. Am. 99, 2022–2032 ~1996!# for imaging pressure and velocity on a vibrating circular cylindrical shell using the far-field pressure measured along a meridional semicircle. The method is examined and some new results are obtained. The procedure is generalized to handle cylindrical surfaces of noncircular but convex cross section....

• A new type of OSH-EMAT was designed by the use half-ring magnets and PCB technology. The EMAT can generate in-plane circumferential Lorentz force in a non-contact manner. number radial conductors is proved to be linearly relating with output efficiency proposed EMAT. and/or receive SH0 mode guided wave good omnidirectional performance. In this paper, an electromagnetic acoustic transducer (EM...

the study of wave and its propagation on the water surface is among significant phenomena in designing quay, marine and water structures. therefore, in order to design structures which are exposed to direct wave forces, it is necessary to study and simulate water surface height and the wave forces on the structures body in different boundary conditions. in this study, the propagation of static ...

Aiming at the undulating member bar, three kinds of wavelength models are established. The flow characteristics bar with space angle attack analyzed by large eddy simulation method under high Reynolds number, its velocity and pressure distribution different wavelengths studied, time frequency domain circumferential coefficient, resistance lift discussed. results suggest that greater fluctuation...

The spiral groove seal has a strong hydrodynamic effect, but it poor pollution resistance at the seal’s end and unfavorable sealing stability. Circumferential waviness seals can use fluid to clean surface have ability self-rush, protecting main cover from contamination. This study presents novel wave-tilt-dam design that integrates structures enhance performance of circumferential seals. object...

Laser tube bending is a flexible forming process. Two irradiation methods of axial and circumferential scanning are generally used to form metal tubes. The two most important disadvantages of circumferential scanning are its lower bending angle and the time interval required between each scan for cooling purpose. In this research, a novel cooling strategy during laser tube bending with circumfe...

In this paper, the propagation of time-harmonic torsional waves in composite elastic cylinders is investigated. An imperfect interface is considered where tractions are continuous across the interface and the displacement jump is proportional to the stress acting on the interface. A frequency equation is derived for the rod and dispersion curves of normalized frequency as a function of normaliz...

The dispersion behavior of circumferential creeping waves around a fluid-filled cylindrical cavity in an infinite elastic medium is analyzed by computational methods. Phase and group velocity as well as attenuation curves are constructed by numerically solving the dispersion equation. A comparison of the corresponding modes for elastic and rigid hosts is presented. The modes in both cases exhib...

In this paper, an analytical study is made for the dynamic behavior of human brain tissue under transient loading. In this analytical model the Mooney-Rivlin constitutive law is coupled with visco-elastic constitutive equations to take into account both the nonlinear and time-dependent mechanical behavior of brain tissue. Five ordinary differential equations representing the relationships of fi...

Epithelial junctions comprise two subdomains, the apical junctional complex (AJC) and the adjacent lateral membrane contacts (LCs), that span the majority of the junction. The AJC is lined with circumferential actin cables, whereas the LCs are associated with less-organized actin filaments whose roles are elusive. We found that DAAM1, a formin family actin regulator, accumulated at the LCs, and...