TY - GEN
T1 - Influence of Periodic Stiffenning on Flanking Noise Transmission
T2 - The 40th International Congress and Exposition on Noise Control Engineering (Inter-noise 2011)
AU - Domadiya, Parthkumar Gandalal
AU - Dickow, Kristoffer Ahrens
AU - Andersen, Lars
AU - Sorokin, Sergey
N1 - Published on a dvd by The Institute of Noise Control Engineering of Japan (NCE/J) and the Acoustical Society of Japan (ASJ).
PY - 2011
Y1 - 2011
N2 - In this paper, a finite-element model is utilized for analysis of noise transmission in a lightweight structure consisting of a source panel subjected to external forces, a receiver panel used to measure the output, and a panel in between acting as a transmission path. Each panel consists of two plates with internal ribs, where it is assumed that the ribs are fully fixed to the plates. A parametric study is carried out on centre panel with regard to various spacing between the ribs. Solid finite elements are adopted for the structure and the computations are carried out in frequency domain in the range below 500 Hz. The responses of the receiving wall are studied under point-force excitation and diffuse-field excitation applied on the source wall. It is found that the positions of the ribs have a significant impact over flanking noise transmission. Thus, a panel with few ribs transmits vibrations in the entire frequency range, whereas a panel with periodic stiffening provides a wide band gap with a significant reduction of the transmitted energy.
AB - In this paper, a finite-element model is utilized for analysis of noise transmission in a lightweight structure consisting of a source panel subjected to external forces, a receiver panel used to measure the output, and a panel in between acting as a transmission path. Each panel consists of two plates with internal ribs, where it is assumed that the ribs are fully fixed to the plates. A parametric study is carried out on centre panel with regard to various spacing between the ribs. Solid finite elements are adopted for the structure and the computations are carried out in frequency domain in the range below 500 Hz. The responses of the receiving wall are studied under point-force excitation and diffuse-field excitation applied on the source wall. It is found that the positions of the ribs have a significant impact over flanking noise transmission. Thus, a panel with few ribs transmits vibrations in the entire frequency range, whereas a panel with periodic stiffening provides a wide band gap with a significant reduction of the transmitted energy.
KW - Lightweight Periodic Structure
KW - Flanking Noise Transmission
KW - Finite-Element Method
KW - Lightweight Periodic Structure
KW - flanking Noise Transmission
KW - Finite-Element Method
M3 - Article in proceeding
T3 - Proceedings of the International Congress on Noise Control Engineering
BT - Proceedings of the 40th International Congress and Exposition on Noise Control Engineering
PB - The Institute of Noise Control Engineering of Japan (NCE/J)
CY - Osaka, Japan
Y2 - 4 September 2011 through 7 September 2011
ER -