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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Transactions of the Korean Society for Noise and Vibration Engineering
Journal Basic Information
Journal DOI :
The Korean Society for Noise and Vibration Engineering
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Volume & Issues
Volume 18, Issue 12 - Dec 2008
Volume 18, Issue 11 - Nov 2008
Volume 18, Issue 10 - Oct 2008
Volume 18, Issue 9 - Sep 2008
Volume 18, Issue 8 - Aug 2008
Volume 18, Issue 7 - Jul 2008
Volume 18, Issue 6 - Jun 2008
Volume 18, Issue 5 - May 2008
Volume 18, Issue 4 - Apr 2008
Volume 18, Issue 3 - Mar 2008
Volume 18, Issue 2 - Feb 2008
Volume 18, Issue 1 - Jan 2008
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Vibration Control Performance of a Two-way Tuned Liquid Mass Damper Using Real-time Hybrid Shaking Table Testing Method
Heo, Jae-Sung ; Lee, Sung-Kyung ; Park, Eun-Churn ; Lee, Sang-Hyun ; Kim, Hong-Jin ; Jo, Ji-Seong ; Cho, Bong-Ho ; Min, Kyung-Won ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 485~495
DOI : 10.5050/KSNVN.2008.18.5.485
An experimental real-time hybrid method, which implements the vibration control of a building structure with only a two-way TLMD, is proposed and verified through a shaking table test. The building structure is divided into the upper experimental TLMD and the lower numerical structural part. The shaking table vibrates the TLMD with the response calculated from the numerical substructure, which is subjected to the excitations of the measured interface control force at its top story and sinusoidal waves input at its base. The results show that the conventional method can be replaced by the proposed methodology with a simple installation and accuracy for evaluating the control performance of a TLMD.
Supersonic and Hypersonic Flutter Characteristics for Various Typical Section Shapes of Missile Fin
Kim, Dong-Hyun ; Kim, Yu-Sung ; Kim, Yo-Han ; Oh, Il-Kwon ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 496~502
DOI : 10.5050/KSNVN.2008.18.5.496
In this study, supersonic and hypersonic flutter characteristics have been analyzed for the various typical section shapes of missile fin configurations. Nonlinear flutter analyses are conducted considering the effect of moving shock waves. Computational fluid dynamic method is applied to accurately predict unsteady aerodynamic loads due to structural motions for the solution of aeroelastic governing equations. Commonly used typical section shapes of supersonic and hypersonic launch vehicles are considered in the present numerical study. Detailed flutter responses for four different typical section models are presented and the flutter characteristics are physically investigated.
An Experimental Study for Predicting the Planetary Gear Noise in the Vehicle
Lee, Hyun-Ku ; Kang, Seock-Chan ; Hur, Jin-Wook ; Bae, Douck-Han ; Kang, Koo-Tae ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 503~508
DOI : 10.5050/KSNVN.2008.18.5.503
In this paper, various methods to improve the planetary gear noise in vehicles were introduced. Those cases of improvement have been used as good guidelines and references to prevent planetary noise problems. In this research, different types of planetary gear systems were also analyzed. The consequences of those analysis said in common that the planetary gear set generating noise mainly is the one which takes power directly from the turbine. Furthermore, a frequency versus vibration level map was introduced to judge how to solve the noise problem quickly in a vehicle development process. Besides, it is provided a predicting method which planetary gear set most contributes to noise problem taking in the vehicle and how to design the planetary gear set robustly.
A Study on the Global Vibration Analysis Method of the Commercial Vessels
Cho, Hyun-Dong ; Choi, Su-Hyun ; Joo, Kyung-Lim ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 509~515
DOI : 10.5050/KSNVN.2008.18.5.509
The vibration analysis is necessary at the design stage to improve crew`s life on board and to prevent the vibration troubles of the hull structures and main machineries prior to the construction. Especially, if high vibration problems occur on the global structures like the hull girder and the deckhouse after construction, it takes lots of time, labor and cost to cure them and thus accurate analysis of global vibration should be performed from the design stage. In this study, some factors for the global vibration analysis have been investigated and the way to be applied to the analysis has been suggested.
A Study on the Noise Property and Its Reduction of the FCEV Blower
Oh, Ki-Seok ; Lee, Sang-Kwon ; Seo, Sang-Hoon ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 516~523
DOI : 10.5050/KSNVN.2008.18.5.516
Centrifugal turbo blower is requested highly efficiency and low noise in FCEV, but the noise generated by this machine causes of the most serious problems in the NVH performance. In general, centrifugal turbo blower is dominated by mechanical noise and aerodynamic noise. Mechanical noise is generated by rotation of the bearing, misalignment and unbalance. And aerodynamic noise is generated by the strong intersection between the flow discharged from the impeller and the cut-off in the casing. The first object of this study is to comprehend a noise property of the blower through the noise test. And, second object is to bring up the method that can reduce blower noise.
Vibration Control and Steering Performance Evaluation of Railway Vehicle Using Magnetorheological Damper
Ha, Sung-Hoon ; Choi, Seung-Bok ; You, Won-Hee ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 524~532
DOI : 10.5050/KSNVN.2008.18.5.524
This paper presents yaw vibration control performances of railway vehicle featuring controllable magnetorheological damper. A cylindrical type of MR damper is devised and its damping force is evaluated by considering fluid resistance and MR effect. Design parameters are determined to achieve desired damping force level. The MR damper model is then incorporated with the governing equations of motion of the railway vehicle which includes vehicle body, bogie and wheel-set. Subsequently, computer simulation of vibration control via proportional-integral-derivative(PID) controller is performed using Matlab. Various control performances are demonstrated under external excitation by creep force between wheel and rail.
Numerical Study on the Control of Heavy-weight Floor Impact Noise for PC Slab Coupled with Viscoelastic Material
Hwang, Jae-Seung ; Song, Jin-Kyu ; Hong, Geon-Ho ; Park, Hong-Gun ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 533~540
DOI : 10.5050/KSNVN.2008.18.5.533
In this study, a new slab system where a part of precast slab is connected each other by viscoelastic material is proposed and numerical analysis is performed to evaluate the effect of the connection between the material and PC slab on the vibration and noise control. Substructuring is introduced to develop the equation of motion for the slab system. In addition, the optimal properties of viscoelastic material are investigated. For the performance evaluation of the new slab system, the sound power and acceleration responses of the slab are compared with those of two way slab and one way slab, respectively. Numerical analysis results show that the sound power of the new slab system can be reduced by viscoelastic material significantly.
Dynamic Contact Analysis of a Wheel Moving on an Elastic Beam with a High Speed
Lee, Ki-Su ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 541~549
DOI : 10.5050/KSNVN.2008.18.5.541
The dynamic contact between a high-speed wheel and an elastic beam is numerically analyzed by solving the whole equations of motion of the wheel and the beam subjected to the contact condition. For the stability of the numerical solution, the velocity and acceleration constraints as well as the displacement constraint are imposed on the contact point. Through the numerical examples, it is shown that the acceleration contact constraint including the Coriolis and centripetal accelerations are crucial for the numerical stability.
Modeling of a Transmission Control Cable for Vibration Analysis
Lee, Byoung-Soo ; Choi, Hae-Woon ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 550~557
DOI : 10.5050/KSNVN.2008.18.5.550
A transmission control cable connects the transmission control arm and the control lever mechanically and transfers control effort exerted by a driver to the transmission. It also transfers vibration generated by the engine to the passenger room through mechanical connection. To understand vibration and noise transfer mechanism and to further find a way to suppress the transmission of vibration effectively, a dependable dynamic vibration model is a necessity. A vibration model for a transmission control cable is developed and a simulation study has been conducted to obtain mode frequencies and a transmittability. The resonance frequencies obtained by an harmonic analysis is compared with the noise level measurement data. The measurement agrees with the simulation result thus ensures the reliability of the model.
Design and Performance Evaluation of the Vibration Absorber of Vertical Direction Using Numerical Simulation and Shock Test
Park, Sang-Gil ; Bang, Seung-Woo ; Kwon, O-Cheol ; Lee, Jung-Youn ; Oh, Jae-Eung ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 558~563
DOI : 10.5050/KSNVN.2008.18.5.558
Vibration/shock affects biggest taking a train subtraction of vehicle and durability decline. Therefore, absorber is used for vibration/shock isolation and various qualities of the material and design are applied to isolation. This paper proposes vibration/shock absorber that applies `Disc` spring. Through comparison with `Disc` spring that has nonlinearity and coil spring that is having linearity, see effect that nonlinearity of isolation gets in vibration/shock Isolation. Coil spring and `Disc` spring are non-linear numerical analysis and simulation through theory for this, get and investigate comparison result through an experiment finally. Expressed and formulated shock through `Runge-Kutta` method/impact response to nonlinear-vibration-equation of 1 degree of freedom for numerical analysis. Double half sine pulse of excitation used and analyzed result through spectrum response analysis here. Response of disc spring is compared to response of coil spring by changing
ratio with computer simulation and the usage of disc spring is increased through analysis of effect of design factors. The purpose of this paper is that the shock response of disc spring is calculated through numerical simulation and to design the optimal absorber under the limited condition. And then, the isolation effect was analyzed through the shock test.
Free Vibration Analysis of an Annular Plate by the Independent Coordinate Coupling Method
Heo, Seok ; Kwak, Moon-K. ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 564~571
DOI : 10.5050/KSNVN.2008.18.5.564
This paper is concerned with the free vibration analysis of an annular plate with boundary conditions of simply supported-free, clamped-free and free-free, respectively. Exact solutions for the natural frequency and mode of an annular plate can be obtained by solving the differential equation but other methods such as the Rayleigh-Ritz method and the finite element method can be also used. In this research, we applied the Independent Coordinate Coupling Method(ICCM) to the annular plate and prove that the ICCM can accurately predict the natural frequency and mode shape of the annular plate. The numerical results show that the ICCM can be used effectively for the free vibration problem of plate with a hole compared to the Rayleigh-Ritz method and the finite element method.
Optimal Design of a Barrel Stave Flextensional Transducer
Kim, Hoe-Yong ; Kim, Won-Ho ; Joh, Chee-Young ; Roh, Yong-Rae ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 18, issue 5, 2008, Pages 572~581
DOI : 10.5050/KSNVN.2008.18.5.572
The performance of a barrel stave flextensional transducer is determined by the properties of its constituent materials and the effects of many structural parameters. In this study, with the finite element method, the structure of a barrel stave flextensional transducer was optimized to achieve the widest bandwidth while satisfying the requirements on pressure and center frequency. The optimization was carried out with the SQP-PD method for multi-variable minimization. The optimized barrel stave flextensional transducer satisfied all the required specifications.