Wheejae Kim, Youngjin Park, Seonbin Lim, Hyungyu Roh, No-Cheol Park
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引用次数: 0
Abstract
Multilayer ceramic capacitors (MLCCs) consist of multiple ceramic layers causing vibration owing to its piezoelectric characteristics. The vibrations are transmitted to the printed circuit board (PCB), causing acoustic noise. The mounting location and direction of the MLCC are crucial factors for reducing the acoustic noise. This paper presents a novel method for determining the optimal location and direction of MLCCs to reduce the acoustic noise. The excitation force of MLCC was simplified to calculate the vibroacoustic response of the PCB efficiently. Two design variables representing the MLCC location and direction were developed, and optimization problems were defined to minimize the acoustic noise. To validate the proposed method, the optimization problems were solved for an M.2 solid-state drive model under various scenarios. The results demonstrated that, on average, the overall sound power level was reduced by 4.59 dB for a single MLCC and 6.04 dB for multiple MLCCs.
期刊介绍：
The aim of the Journal of Mechanical Science and Technology is to provide an international forum for the publication and dissemination of original work that contributes to the understanding of the main and related disciplines of mechanical engineering, either empirical or theoretical. The Journal covers the whole spectrum of mechanical engineering, which includes, but is not limited to, Materials and Design Engineering, Production Engineering and Fusion Technology, Dynamics, Vibration and Control, Thermal Engineering and Fluids Engineering.
Manuscripts may fall into several categories including full articles, solicited reviews or commentary, and unsolicited reviews or commentary related to the core of mechanical engineering.
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