Vibration

non-streamlined structures or streamlined bodies at large angles of attack, remains a critical focus of study within the fluid mechanics community. One particular area of interests involves the occurrence of fluid-induced vibrations, or more commonly known as vortex-induced vibrations (VIV’s), exerted on bluff bodies. Due to the production of vortex shedding beyond bluff cross sections, an alternating pressure distribution produces periodic fluctuations in lift and drag forces on the surface of…

Sound travels through matter, which is a solid, liquid or gas. Sound travels in longitudinal waves. There is also a vibration that starts on an object, and this causes a vibration on all the molecules. When these molecules vibrate, they cause all of the other surrounding molecules to vibrate. This vibration will spread from molecule to molecule causing sound to travel. 1. What is a wave? A wave is a chain of vibrating molecules. In general, a wave transfers energy from one place to another. 2.…

in-plane vibration for Si doped fullerene with alanine are 1201, 1206, 1207, 1236, 1237, 1244, 1273, 1293, 1329, 1331 and 1335cm-1, B doped fullerene with alanine are 1211, 1236,1277 and 1307cm-1. C-H out of plane vibration are 705, 715, 731, 747, 753, 755, 760, 770, 773, 780, 827, 831, 857, 872, 904, 937 and 950cm-1. C-N Vibration The C-N vibration of doped fullerene with alanine is normally occuring in the region 1382-1266cm-1 at B3LYP level. The C-N in-plane and out of plane vibration are…

Sushil Bhandari (1997) defined vibration as a repeated movement in the normal rest position. The parameters involved with vibration are commonly amplitude or displacement and velocity or acceleration of the ground movement (Visvan, 2005). During demolition operation, vibration is normally caused by the impact of fallen structures or by the use of explosives (BS 6187:2000), which could pose detrimental effects of structural damage of adjacent premises, buried services like gas pipes, disturbance…

Vibration Analysis of a Centrifugal Pump A.Naveen Varma1, K. Bala Bhaskar1, B. Sai Kumar1, G.Giridhar1, Vamsi Raja2, P.Phani Prasanthi3 1Research Scholars 1Department of Mechanical Engineering, P.V.S.I.T. Kanuru (A.P), India-520007 2Associate Manager, Kirloskar Brothers Limited, Pune, India. 3Assistant Professor 3Department of Mechanical Engineering, P.V.S.I.T. Kanuru (A.P), India-520007. ABSTRACT: Centrifugal pumps are among the more versatile and widely used products of rotating mechanical…

The FT-Raman and FT-IR spectroscopic analysis of 2'-nitroacetophenone (2NAP) were performed. The vibrational spectra of 2NAP was found by applying the Density Functional Theory Calculations based on Beck3-lee-yang-parr (B3LYP) level with the use of the standard 6-31G*/6-311+G** basis set. The vibrational wave number for the optimized geometry was calculated at the same level of theory. The computed values of frequencies are scaled using an appropriate scale factor to give up the excellent unity…

M1 - Justify the selection of suitable materials and techniques for use in the construction of substructures for low-rise domestic and commercial buildings, for two different tutor-specified scenarios Concrete is used for foundations as when compressed, concrete can suffer extremely high compressive stresses before any type of cracking of failure occurs which makes it an ideal substance for supporting large masses such as buildings. Concrete will also be less prone to movement. Also concrete…

When a tennis ball is hit, vibrations are created in both the racquet and ball (Dyer, 2001). The ideal situation, and what happens if a sweet spot is hit, is these vibrations move back into the tennis ball, giving the ball a higher kinetic energy, and thus a higher velocity, as kinetic energy is proportional to velocity. This also makes the hit feel better, as less of the vibrations travel into your arm. There are four main points of interest on the racquet…

The gear vibration signals containing three subsets included the normal healthy condition as shown in figure 18, Gear teeth has been cut 4 mm depth from addendum circle that as shows in figure 19 and gear 2 teeth’s were defected as by it has cut 4 mm depth from addendum circle opposite sides each other that as shown in figure 20, are obtained from the experimental system under these three different conditions. The vibration signals are continuously acquired by an YMC145A100…

drum. The cello is part of the string family, and consists of a wooden neck, endpin, tuners, fingerboard, bridge, and body. The cello has four strings: A,D,G,and C. The strings are held by the bridge and when a string is plucked or bowed it sends vibration waves through the cello producing the sound. One of the most common uses for the cello is at an orchestra or quartet. The trumpet is part of the brass family and consists of valves, mouthpiece, lead pipe, tuning slide, and bell. Playing the…