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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 20, Issue 12 - Dec 2010
Volume 20, Issue 11 - Nov 2010
Volume 20, Issue 10 - Oct 2010
Volume 20, Issue 9 - Sep 2010
Volume 20, Issue 8 - Aug 2010
Volume 20, Issue 7 - Jul 2010
Volume 20, Issue 6 - Jun 2010
Volume 20, Issue 5 - May 2010
Volume 20, Issue 4 - Apr 2010
Volume 20, Issue 3 - Mar 2010
Volume 20, Issue 2 - Feb 2010
Volume 20, Issue 1 - Jan 2010
Selecting the target year
Analysis of Major Factors and Guideline for Road Traffic Noise Prediction
Kang, Dae-Joon ; Lee, Jae-Won ; Gu, Jin-Hoi ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 515~520
DOI : 10.5050/KSNVE.2010.20.6.515
The noise map has been applied to predicting the effect of noise and establishing the noise abatement measure for several years overseas. However the introduction of the noise map in Korea is at the initial stage. Thus, we surveyed the several prediction models for road traffic noise used in EU, and the method of applying the noise map in noise impact assessment. In order to improve the noise impact assessment we have to apply the noise map, and propose the guideline of predicting the road traffic noise. We intend to obtain coherency and accuracy of prediction results. As a result of this study, we know that the prediction guideline is an essential prerequisite in order to predict the unified and accurate road traffic noise.
Analysis of the Sound Radiation of Transmission Gearbox Housing and Reduction Design
Jeong, Seong-Young ; Oh, Ha-Yeong ; Park, Jun-Hong ; Park, Gyung-Jin ; Lee, Hyun-Ah ; Choi, Joong-Sun ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 521~527
DOI : 10.5050/KSNVE.2010.20.6.521
This article presents a method to calculate the sound radiation of transmission gearbox housing by using Helmholtz integral. Rayleigh integral is used to verify the method. Half-space radiation is considered because the actual gearbox housing is on hard place like concrete. For optimization, orthogonal array is used as a fractional factorial design method. Sound Radiation is calculated with simple source like plate and sphere shape, then actual gearbox BEM model is applied to the method.
A Study on the Experimental Dynamic Identification of Cylindrical Oil Dampers in the Wide Frequency Range
Moon, S.J. ; Kim, H.S. ; Chung, T.Y. ; Lee, D.H. ; Hwang, J.Y. ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 528~536
DOI : 10.5050/KSNVE.2010.20.6.528
System identification for cylindrical oil dampers is carried out based on a series of dynamic experimental tests and theoretical approach for the analysis of the experimental data. Experimental tests are conducted using a specific hydraulic actuator in the wide frequency range from 10 Hz to 90 Hz. From this study, it is confirmed that control force of the damper is composed of inertia, damping and restoring components. In general, both restoring and damping components are significant and comparable. However, the portion of the inertia components becomes more significant than to be negligible in the high frequency range.
A Study on the Quasi-static Overturning and Derailment Safety of Tilting Train
Souh, Byung-Yil ; Lee, Byung-Hoon ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 537~545
DOI : 10.5050/KSNVE.2010.20.6.537
This study presents a method to evaluate overturning safety and derailment safety of korean tilting train using kinematic analysis of four-bar linkage tilting mechanism. The safety is evaluated considering tilting vehicle body CG displacement. The design sensitivity for stable and safe maximum speed is evaluated around current korean tilting train design data. The current design shows minimum center of gravity displacement. Higher speed can be achieved with larger center of gravity displacement.
Structural and Vibration Characteristics for the Scaffolding System of LNG Cargo Containment
Oh, B.J. ; Ryu, B.J. ; Lee, Y.S. ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 546~554
DOI : 10.5050/KSNVE.2010.20.6.546
The paper deals with the structural analysis and vibration test for the scaffolding system of LNG cargo containment. The eight-stories scaffolding system has telescopic area, working area, coner area and storage area in real system. In the structural analysis, the maximum displacement and stress of the each floor for the scaffolding system are investigated by finite element method. In the vibrational analysis, the natural frequencies and mode shapes for 8-stories scaffolding system of the LNG cargo containment are investigated. In order to compare theoretical natural frequencies with experimental ones, small size of 2-step scaffolding structure is used, and the theoretical results for natural frequency have a good agreement with experimental ones.
Application Method of Logistic Regression Analysis for Annoyance Prediction Model Based on Predicted Noise Level
Son, Jin-Hee ; Lee, Kun ; Choung, Tae-Ryang ; Chang, Seo-Il ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 555~561
DOI : 10.5050/KSNVE.2010.20.6.555
Predicted noise level has been used to assess the annoyance response since noise map was generalized and being the normal method to assess the environmental noise. Unfortunately using predicted noise level to derive the annoyance prediction curve caused some problems. The data have to be grouped manually to use the annoyance prediction curve. The aim of this paper is to propose the method to handle the predicted noise level and the survey data for annoyance prediction curve. This paper used the percentage of persons annoyed(%A) and the percentage of persons highly annoyed as the descriptor of noise annoyance in a population. The logistic regression method was used for deriving annoyance prediction curve. It is concluded that the method of dichotomizing data and logistic regression was suitable to handle the predicted noise level and survey data.
Evaluation of the Inputs Efficiency for the Interior Noise of the Vehicle using Vector Synthesis Method
Yang, In-Hyung ; Jeong, Jae-Eun ; Oh, Jae-Eung ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 562~567
DOI : 10.5050/KSNVE.2010.20.6.562
A passenger vehicle has various and complicated transmission paths of sound and vibration. In order to identify the mechanism of transfer path, estimation of excitation force and exact modeling of transfer path are required. In this paper vector synthesis technique is employed to identify the characteristics of road noise and its transmission to vehicle compartment through noise and vibration analysis. Vibration reduction efficiency of each transfer path is evaluated by comparing individual vector components obtained virtual simulation. The degree of effect is used to estimate the contribution of vibration input components to total output. And in this paper presents a new technique based on simulation studies using vector synthesis diagram and design of experiments, by which the effects of magnitude and phase change of input paths can be predicted.
Comparison of Window Functions for the Estimation of Leak Location for Underground Plastic Pipes
Lee, Young-Sup ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 568~576
DOI : 10.5050/KSNVE.2010.20.6.568
It is widely known that the leak locating of underground plastic pipelines is much more difficult than that of cast iron pipelines. The precision of the leak locating depends upon the speed of leak signal and the time delay estimation between the two sensors on the pipeline. In this paper, six different windowing filters are considered to improve the time delay estimation especially for the plastic pipelines. The time delay is usually estimated from the peak time of cross-correlation functions. The filtering windows including rectangle, Roth, Wiener, SCOT, PHAT and maximum likelihood are applied to derive the generalized cross-correlation function and compared each other. Experimental results for the actual plastic underground water supply pipeline show that the introduction of the filtering windows improved the precision of time delay estimation. Some window functions provide excellent leak locating capability for the plastic pipe of 98 m long, which is less than 1 % of the pipe lengths. Also a new probabilistic approach that the combinations of all results from each filtering window is suggested for the better leak locating.
Tilting Effect of Automotive Seat System on Squeak Noise
Kang, Jae-Young ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 577~582
DOI : 10.5050/KSNVE.2010.20.6.577
The squeak propensity in the gear box of an automotive seat system is investigated analytically. The mating parts in the gear box are the lead screw and the nut, where the friction stresses are exerted on the thread of the screw. The lead screw is modeled as a circular beam allowing the bending and torsional vibrations. In the system, the lead screw converts rotating to translating motion so that it moves the automotive seat slightly tilted on the floor. The tilting angle is considered one major parameter in this study. Therefore, the equations of motion associated with the non-conservative friction force are derived with the inclusion of the tilting angle. It is found that the squeak noise corresponds to the several bending modes of the lead screw and its propensity is increased by the tilting angle of the seat.
Dynamic Response Analysis of Composite H-type Cross-section Beams
Kim, Sung-Kyun ; Song, Oh-Seop ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 583~592
DOI : 10.5050/KSNVE.2010.20.6.583
Equations of motion of thin-walled composite H-type cross-section beams exposed to concentrated harmonic and non-harmonic time-dependent external excitations, incorporating a number of nonclassical effects of transverse shear, primary and secondary warping, and anisotropy of constituent materials are derived. The forced vibration response characteristics of a composite H-type cross-section beam exhibiting the circumferentially asymmetric stiffness(CAS) configuration are exploited in connection with the structural bending-torsion coupling resulting from directional properties of fiber reinforced composite materials.
Stability Analysis of Multi-wall Carbon Nanotubes Conveying Fluid
Song, Oh-Seop ; Yun, Kyung-Jae ;
Transactions of the Korean Society for Noise and Vibration Engineering, volume 20, issue 6, 2010, Pages 593~603
DOI : 10.5050/KSNVE.2010.20.6.593
In this paper, vibration and flow-induced flutter instability analysis of cantilever multi-wall carbon nanotubes conveying fluid and modelled as a thin-walled beam is investigated. Non-classical effects of transverse shear and rotary inertia and van der Waals forces between two walls are incorporated in this study. The governing equations and the associated boundary conditions are derived through Hamilton's principle. Numerical analysis is performed by using extend Galerkin method which enables us to obtain more exact solutions compared with conventional Galerkin method. Cantilevered carbon nanotubes are damped with decaying amplitude for flow velocity below a certain critical value, however, beyond this critical flow velocity, flutter instability may occur. Variations of critical flow velocity with both radius ratio and length of carbon nanotubes are investigated and pertinent conclusion is outlined.