This article presents frequency responses calculated using a three-dimensional finite-element model of the cat eardrum that includes damping. The damping is represented by both mass-proportional and stiffness-proportional terms. With light damping, the frequency responses of points on the eardrum away from the manubrium display numerous narrow minima and maxima, the frequencies and amplitudes o...

experimental study of the cyclic behavior of unsaturated materials is more complex than that of the saturated materials due to the required equipment, experience and time. furthering investigations in the field of unsaturated materials is necessary to better understand its complexity and sensitivity of unsaturated cyclic parameters to different determinants such as suction path, stress path, lo...

Extreme anelastic responses (stiffness greater than diamond and large amplification of damping) due to the presence of a negative stiffness phase have been observed in Zn80Al20-BaTiO3 composites not only near the tetragonalorthorhombic transformation temperatures of BaTiO3 anticipated by the classical Landau theory, but far below the Curie point of BaTiO3 which can be manipulated via specific a...

Abstract The concept of local resonance phononic crystals proposed in recent years provides a new chance for theoretical and technical breakthroughs the structural vibration reduction. In this paper, novel sandwich-like plate model with resonator to acquire specific low-frequency bandgaps is proposed. core layer present composed by simply supported overhanging beam, linear spring mass block, we...

Squeeze-film effects of perforated plates for small amplitude vibration are analyzed through modified Reynolds equation (MRE). The analytical analysis reckons in most important influential factors: compressibility of the air, border effects, and the resistance caused by vertical air flow passing through perforated holes. It is found that consideration of air compressibility is necessary for hig...

Most real-world events stimulate multiple sensory modalities simultaneously. Usually, the stiffness of an object is perceived haptically. However, auditory signals also contain stiffness-related information, and people can form impressions of stiffness from the different impact sounds of metal, wood, or glass. To understand whether there is any interaction between auditory and haptic stiffness ...

As an innovative approach to teaching the laboratory component of an undergraduate course on dynamic systems, we present the haptic paddle: a low-cost, single-axis, force-feedback joystick. Using the paddle, students not only learned to model and analyze dynamic systems, but by using their sense of touch, they were able to feel the effects of phenomena such as viscous damping, stiffness, and in...

It is very well known that tuned mass dampers are engineered to minimise the vibrations in buildings in earthquake prone areas and in some cases machinery [1]. This paper evaluates the utility of Tuned Mass Dampers in passenger cars. For the same suspension system, addition of a tuned mass was found to reduce the transmissibility by a considerable amount. Addition of a tuned mass also helps in ...