Session: 10-01 Tribology, Dynamics and Servo control of Nano-Micro systems

Paper Number: 109220

109220 - Analysis of Vibration and Acoustic Response of the Solid State Drive Due to the Vibration of Multilayer Ceramic Capacitors With Blocked Force Method 

A multilayer ceramic capacitor (MLCC) vibrates when a pulse signal or a periodic signal is applied due to the piezoelectric characeteristics of the MLCC, which causes structural resonance and acoustic noise in the Solid State Drive (SSD). Since MLCC is attached to the SSD through solders, the vibration of MLCC can be treated as a complex input to the SSD in which normal force and moment are combined. Therefore, the vibration and acoustic response of the SSD varies greatly depending on the location or direction of the MLCC. In this study, the vibration and acoustic noise of the SSD due to the vibration of the MLCC were calculated, and the vibration and acoustic response of the SSD according to the change of location and direction of the MLCC were analyzed. Since it is difficult to experiment the SSD while moving the position and direction of MLCC, a finite element model of MLCCs and SSD were constructed. By the blocked force method, the excitation force and moments of the MLCC was obtained. Vibration of SSD due to MLCC excitation was calculated with the mode superposition method. The radiated sound was estimated from the radiation resistance matrix and the surface velocity of the SSD by the discrete calculation method. Finally, the vibration and noise responses of the SSD were compared through a parameter study on the position and direction of MLCCs.

Presenting Author: Wheejae Kim Yonsei University, Korea

Presenting Author Biography: Wheejae Kim received B.S. degree in mechanical engineering from Yonsei University, Seoul, Republic of Korea, in 2018. He is a Ph.D student at VIBOM (Vibration & Optomechatronics Lab) and CISD (Center for Information Storage Device) of Yonsei University since 2018. His current researh interests include mechanical vibration and noise control, vibroacoustics, acoustics, structural dynamics, and haptic.