"P(GA101/09/1166), Z(AV0Z20760514)" . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "12"^^ . "The steady state response of a model of circular bladed disk with imperfection is investigated. Disk imperfection results from additional two groups of damping heads fixed on opposite ends of one diameter. These damping heads are introduced into the computing model as additional point mass, damping and stiffness. Such type of imperfection causes the bifurcation of double eigenfrequencies into pairs of close eigenfrequencies. The effect of imperfection is examined both numerically on three-dimensional nonrotating FE-model and analytically on a simplified split 2DOF model of rotating disk excited by single point harmonic force. Nonlinear friction connection is analyzed and equivalent linear damping coefficient is derived and used in the calculation procedure. It is shown that nonproportional distribution of damping strongly influences the high of resonance peaks. Some examples of response curves illustrate the dynamic properties of stationary and rotating disks with mass-damping-stiffness imperfection." . . . . . "21" . "000297520100011" . . "2"^^ . . . "2"^^ . . "10.1142/S0218127411030210" . . "Pe\u0161ek, Lud\u011Bk" . "RIV/61388998:_____/11:00368679!RIV12-AV0-61388998" . . "[B092EBD09961]" . "http://www.worldscinet.com/ijbc/21/2110/S0218127411030210.html" . . . . "Vibration of circular bladed disk with imperfections"@en . "International Journal of Bifurcation and Chaos" . "P\u016Fst, Ladislav" . "238347" . "circular bladed disk; vibration; imperfection; nonlinear damping"@en . . . "10" . . "Vibration of circular bladed disk with imperfections" . . "Vibration of circular bladed disk with imperfections" . "Vibration of circular bladed disk with imperfections"@en . . "The steady state response of a model of circular bladed disk with imperfection is investigated. Disk imperfection results from additional two groups of damping heads fixed on opposite ends of one diameter. These damping heads are introduced into the computing model as additional point mass, damping and stiffness. Such type of imperfection causes the bifurcation of double eigenfrequencies into pairs of close eigenfrequencies. The effect of imperfection is examined both numerically on three-dimensional nonrotating FE-model and analytically on a simplified split 2DOF model of rotating disk excited by single point harmonic force. Nonlinear friction connection is analyzed and equivalent linear damping coefficient is derived and used in the calculation procedure. It is shown that nonproportional distribution of damping strongly influences the high of resonance peaks. Some examples of response curves illustrate the dynamic properties of stationary and rotating disks with mass-damping-stiffness imperfection."@en . "RIV/61388998:_____/11:00368679" . "0218-1274" . . .