The Experts below are selected from a list of 16791 Experts worldwide ranked by ideXlab platform
Zhike Peng - One of the best experts on this subject based on the ideXlab platform.
-
the force transmissibility of mdof structures with a non linear Viscous Damping device
International Journal of Non-linear Mechanics, 2011Co-Authors: Stephen A Billings, Z Q Lang, Zhike Peng, L Zhao, Geoffrey R TomlinsonAbstract:Abstract In the present study, the concept of the Output Frequency Response Function (OFRF), recently proposed by the authors, is applied to theoretically investigate the force transmissibility of MDOF structures with a cubic non-linear Viscous Damping device. The results analytically show that the introduction of cubic non-linear Damping can significantly reduce the transmissibility over all resonance regions for a Multiple Degree of Freedom (MDOF) structure and at the same time leave the transmissibility over the isolation region virtually unaffected. The analysis also indicates that a strong linear Damping may shift the system resonances and compromise the beneficial effects of cubic non-linear Viscous Damping on the force transmissibility of MDOF structures. This suggests that a less significant linear Damping together with a strong cubic non-linear Damping can be used in MDOF structures to achieve a desired vibration isolation performance. This research work has a significant implication for the design of Viscously damped MDOF structures for a wide range of practical applications.
-
theoretical study of the effects of nonlinear Viscous Damping on vibration isolation of sdof systems
Journal of Sound and Vibration, 2009Co-Authors: Z Q Lang, Stephen A Billings, Xingjian Jing, Geoffrey R Tomlinson, Zhike PengAbstract:The present study is concerned with the theoretical analysis of the effects of nonlinear Viscous Damping on vibration isolation of single degree of freedom (sdof) systems. The concept of the output frequency response function (OFRF) recently proposed by the authors is applied to study how the transmissibility of a sdof vibration isolator depends on the parameter of a cubic Viscous Damping characteristic. The theoretical analysis reveals that the cubic nonlinear Viscous Damping can produce an ideal vibration isolation such that only the resonant region is modified by the Damping and the non-resonant regions remain unaffected, regardless of the levels of Damping applied to the system. Simulation study results demonstrate the validity and engineering significance of the analysis. This research work has significant implications for the analysis and design of Viscously damped vibration isolators for a wide range of practical applications.
Rakesh K. Goel - One of the best experts on this subject based on the ideXlab platform.
-
effects of supplemental Viscous Damping on seismic response of asymmetric plan systems
Earthquake Engineering & Structural Dynamics, 1998Co-Authors: Rakesh K. GoelAbstract:Coupling between lateral and torsional motions may lead to much larger edge deformations in asymmetric-plan systems compared to systems with a symmetric plan. Supplemental Viscous Damping has been found to be effective in reducing deformations in the symmetric-plan system. This investigation examined how supplemental Damping affects the edge deformations in asymmetric-plan systems. First, the parameters that characterize supplemental Viscous Damping and its plan-wise distribution were identified, and then the effects of these parameters on edge deformations were investigated. It was found that supplemental Damping reduces edge deformations and that reductions by a factor of up three are feasible with proper selection of system parameters. Furthermore, Viscous Damping may be used to reduce edge deformations in asymmetric-plan systems to levels equal to or smaller than those in the corresponding symmetric-plan system. © 1998 John Wiley & Sons, Ltd.
-
Effects of supplemental Viscous Damping on seismic response of asymmetric‐plan systems
Earthquake Engineering & Structural Dynamics, 1998Co-Authors: Rakesh K. GoelAbstract:Coupling between lateral and torsional motions may lead to much larger edge deformations in asymmetric-plan systems compared to systems with a symmetric plan. Supplemental Viscous Damping has been found to be effective in reducing deformations in the symmetric-plan system. This investigation examined how supplemental Damping affects the edge deformations in asymmetric-plan systems. First, the parameters that characterize supplemental Viscous Damping and its plan-wise distribution were identified, and then the effects of these parameters on edge deformations were investigated. It was found that supplemental Damping reduces edge deformations and that reductions by a factor of up three are feasible with proper selection of system parameters. Furthermore, Viscous Damping may be used to reduce edge deformations in asymmetric-plan systems to levels equal to or smaller than those in the corresponding symmetric-plan system. © 1998 John Wiley & Sons, Ltd.
Geoffrey R Tomlinson - One of the best experts on this subject based on the ideXlab platform.
-
the force transmissibility of mdof structures with a non linear Viscous Damping device
International Journal of Non-linear Mechanics, 2011Co-Authors: Stephen A Billings, Z Q Lang, Zhike Peng, L Zhao, Geoffrey R TomlinsonAbstract:Abstract In the present study, the concept of the Output Frequency Response Function (OFRF), recently proposed by the authors, is applied to theoretically investigate the force transmissibility of MDOF structures with a cubic non-linear Viscous Damping device. The results analytically show that the introduction of cubic non-linear Damping can significantly reduce the transmissibility over all resonance regions for a Multiple Degree of Freedom (MDOF) structure and at the same time leave the transmissibility over the isolation region virtually unaffected. The analysis also indicates that a strong linear Damping may shift the system resonances and compromise the beneficial effects of cubic non-linear Viscous Damping on the force transmissibility of MDOF structures. This suggests that a less significant linear Damping together with a strong cubic non-linear Damping can be used in MDOF structures to achieve a desired vibration isolation performance. This research work has a significant implication for the design of Viscously damped MDOF structures for a wide range of practical applications.
-
theoretical study of the effects of nonlinear Viscous Damping on vibration isolation of sdof systems
Journal of Sound and Vibration, 2009Co-Authors: Z Q Lang, Stephen A Billings, Xingjian Jing, Geoffrey R Tomlinson, Zhike PengAbstract:The present study is concerned with the theoretical analysis of the effects of nonlinear Viscous Damping on vibration isolation of single degree of freedom (sdof) systems. The concept of the output frequency response function (OFRF) recently proposed by the authors is applied to study how the transmissibility of a sdof vibration isolator depends on the parameter of a cubic Viscous Damping characteristic. The theoretical analysis reveals that the cubic nonlinear Viscous Damping can produce an ideal vibration isolation such that only the resonant region is modified by the Damping and the non-resonant regions remain unaffected, regardless of the levels of Damping applied to the system. Simulation study results demonstrate the validity and engineering significance of the analysis. This research work has significant implications for the analysis and design of Viscously damped vibration isolators for a wide range of practical applications.
Z Q Lang - One of the best experts on this subject based on the ideXlab platform.
-
The benefits of nonlinear cubic Viscous Damping on the force transmissibility of a Duffing-type vibration isolator
Proceedings of 2012 UKACC International Conference on Control, 2012Co-Authors: Carmen Ho, Z Q Lang, Stephen A BillingsAbstract:Vibration isolation systems with nonlinear stiffness under sinusoidal excitation exhibit unwanted jump phenomena and superharmonics when they are lightly damped. These characteristics can be suppressed by linear Viscous Damping but the force transmissibility over the high frequency range increases as a result. In this study, nonlinear Viscous Damping will be chosen to solve this problem with the aid of a single-degree-of-freedom model with cubic stiffness. Simulation results show that nonlinear Viscous Damping can reduce the resonant peak as well as suppressing the adverse properties of nonlinear stiffness, jumps and harmonics, without compromising the transmissibility over the high frequency range. Nonlinear Damping preserves the benefits of linear Damping while removing the undesirable effects over the non-resonant regions and therefore improves the overall performance.
-
the force transmissibility of mdof structures with a non linear Viscous Damping device
International Journal of Non-linear Mechanics, 2011Co-Authors: Stephen A Billings, Z Q Lang, Zhike Peng, L Zhao, Geoffrey R TomlinsonAbstract:Abstract In the present study, the concept of the Output Frequency Response Function (OFRF), recently proposed by the authors, is applied to theoretically investigate the force transmissibility of MDOF structures with a cubic non-linear Viscous Damping device. The results analytically show that the introduction of cubic non-linear Damping can significantly reduce the transmissibility over all resonance regions for a Multiple Degree of Freedom (MDOF) structure and at the same time leave the transmissibility over the isolation region virtually unaffected. The analysis also indicates that a strong linear Damping may shift the system resonances and compromise the beneficial effects of cubic non-linear Viscous Damping on the force transmissibility of MDOF structures. This suggests that a less significant linear Damping together with a strong cubic non-linear Damping can be used in MDOF structures to achieve a desired vibration isolation performance. This research work has a significant implication for the design of Viscously damped MDOF structures for a wide range of practical applications.
-
theoretical study of the effects of nonlinear Viscous Damping on vibration isolation of sdof systems
Journal of Sound and Vibration, 2009Co-Authors: Z Q Lang, Stephen A Billings, Xingjian Jing, Geoffrey R Tomlinson, Zhike PengAbstract:The present study is concerned with the theoretical analysis of the effects of nonlinear Viscous Damping on vibration isolation of single degree of freedom (sdof) systems. The concept of the output frequency response function (OFRF) recently proposed by the authors is applied to study how the transmissibility of a sdof vibration isolator depends on the parameter of a cubic Viscous Damping characteristic. The theoretical analysis reveals that the cubic nonlinear Viscous Damping can produce an ideal vibration isolation such that only the resonant region is modified by the Damping and the non-resonant regions remain unaffected, regardless of the levels of Damping applied to the system. Simulation study results demonstrate the validity and engineering significance of the analysis. This research work has significant implications for the analysis and design of Viscously damped vibration isolators for a wide range of practical applications.
Stephen A Billings - One of the best experts on this subject based on the ideXlab platform.
-
The benefits of nonlinear cubic Viscous Damping on the force transmissibility of a Duffing-type vibration isolator
Proceedings of 2012 UKACC International Conference on Control, 2012Co-Authors: Carmen Ho, Z Q Lang, Stephen A BillingsAbstract:Vibration isolation systems with nonlinear stiffness under sinusoidal excitation exhibit unwanted jump phenomena and superharmonics when they are lightly damped. These characteristics can be suppressed by linear Viscous Damping but the force transmissibility over the high frequency range increases as a result. In this study, nonlinear Viscous Damping will be chosen to solve this problem with the aid of a single-degree-of-freedom model with cubic stiffness. Simulation results show that nonlinear Viscous Damping can reduce the resonant peak as well as suppressing the adverse properties of nonlinear stiffness, jumps and harmonics, without compromising the transmissibility over the high frequency range. Nonlinear Damping preserves the benefits of linear Damping while removing the undesirable effects over the non-resonant regions and therefore improves the overall performance.
-
the force transmissibility of mdof structures with a non linear Viscous Damping device
International Journal of Non-linear Mechanics, 2011Co-Authors: Stephen A Billings, Z Q Lang, Zhike Peng, L Zhao, Geoffrey R TomlinsonAbstract:Abstract In the present study, the concept of the Output Frequency Response Function (OFRF), recently proposed by the authors, is applied to theoretically investigate the force transmissibility of MDOF structures with a cubic non-linear Viscous Damping device. The results analytically show that the introduction of cubic non-linear Damping can significantly reduce the transmissibility over all resonance regions for a Multiple Degree of Freedom (MDOF) structure and at the same time leave the transmissibility over the isolation region virtually unaffected. The analysis also indicates that a strong linear Damping may shift the system resonances and compromise the beneficial effects of cubic non-linear Viscous Damping on the force transmissibility of MDOF structures. This suggests that a less significant linear Damping together with a strong cubic non-linear Damping can be used in MDOF structures to achieve a desired vibration isolation performance. This research work has a significant implication for the design of Viscously damped MDOF structures for a wide range of practical applications.
-
theoretical study of the effects of nonlinear Viscous Damping on vibration isolation of sdof systems
Journal of Sound and Vibration, 2009Co-Authors: Z Q Lang, Stephen A Billings, Xingjian Jing, Geoffrey R Tomlinson, Zhike PengAbstract:The present study is concerned with the theoretical analysis of the effects of nonlinear Viscous Damping on vibration isolation of single degree of freedom (sdof) systems. The concept of the output frequency response function (OFRF) recently proposed by the authors is applied to study how the transmissibility of a sdof vibration isolator depends on the parameter of a cubic Viscous Damping characteristic. The theoretical analysis reveals that the cubic nonlinear Viscous Damping can produce an ideal vibration isolation such that only the resonant region is modified by the Damping and the non-resonant regions remain unaffected, regardless of the levels of Damping applied to the system. Simulation study results demonstrate the validity and engineering significance of the analysis. This research work has significant implications for the analysis and design of Viscously damped vibration isolators for a wide range of practical applications.
