PPT-What is the Damping ? Damping

is a dissipation of energy from a vibrating structure The term dissipate is used to mean the transformation of mechanical energy into other form of energy and therefore a removal . Response to Damping As we saw the unfor ced damped harmonic oscillator has equation 0 1 with 0 0 and 0 It has characteristic equation 2 0 with characteristic oots 2 2 Ther e ar e thr ee cases depending on the sign of the expr ession u 1. Type I. Type II. Type. III. Part A. Liquid. epoxy resin (LER). WB. epoxy dispersion. WB. acrylic latex. Part B. WB amine hardener. WB amine hardener. WB. epoxy dispersion. New Technology: Acrylic-Epoxy Hybrids. Damping . ?. Damping. . is a dissipation . of. . energy from a vibrating structure. .. The . term dissipate is used to . mean. . the transformation of . mechanical. . energy into other form of energy and, therefore, a removal . Quantum Correlations in . Nuclear Magnetic Resonance Systems. Eduardo Ribeiro . deAzevedo. São Paulo. Brazil. 75 years. 240 courses. 57.000 undergrad students. ~200 Msc. and PHD programs. UNIVERSITY OF SÃO PAULO - USP. G. Dugan. PAC TDR review . 12/13/12. Dec. 13, 2012. ILC Damping Rings. 1. Outline. Requirements. Configuration, parameters, operating modes. Lattice. Beam dynamics issues. Emittance. tuning and nonlinear effects. DAMPING TORQUE. Air Friction . Damping. Fluid Friction . Damping. Eddy Current . Damping. Electromagnetic . Damping. K-12EL-09. K-12EL-57. Super vision By:. Sir . Sajid. . Hussain. . Qazi. The damping force ensures. Typically, harmonic motion decreases in amplitude with time….this realistic model describes damped harmonic motion.. The damping effect is a result of friction and internal resistance of the system to further motion.. Typically, harmonic motion decreases in amplitude with time….this realistic model describes damped harmonic motion.. The damping effect is a result of friction and internal resistance of the system to further motion.. 1. Forced oscillator with damping. . resistance force is proportional to speed : . Equation of motion. 2. In ‘complex’ method. For convenience: . Also,. . k=m. w. 0. 2. 3. Solution of damped harmonic motion. Good Vibrations:. Standing waves can be produced on a string fixed at both ends if the length of the string . L. is a multiple of half the wavelength . l. ,. so that the ends of the string are nodes. These waves are called “harmonics” and are identified by “. Engineering: B.4, pages 582-588. Free Vibration. A mass is free to oscillate. No external forces acting on the mass. Amplitude, frequency, period…all constant. Natural Frequency (. f. 0. ). The frequency of the free vibrations of a system. 421L/521L (Lab 8). Single DOF Modeling. E, I, L, . ρ. . E, I, L, . ρ. . M. k. c. x. mx” cx’ . kx. = f(t). x(t) = . Aexp. (-. ξ. ω. n. t. )COS(. ω. n. sqrt. (1-. ξ. 2. )t-. ψ. ) . Bsin. Submitted . by:. MAHESH CHAND SHARMA. M.TECH. –III SEM (2011-12). (2010PST116). Guided by:. Dr. M.K.Shrimali. Dr. S.D. Bharti. Department of Structural Engineering. Yannis . PAPAPHILIPPOU. Accelerator and Beam Physics group. Beams Department. CERN. Ninth International Accelerator School for Linear Colliders. 26 October – 6 November 2015, . Whistler BC, Canada.