Sound Power Estimation for Beam and Plate Structures Using Polyvinylidene Fluoride Films as Sensors
AbstractThe theory for calculation and/or measurement of sound power based on the classical velocity-based radiation mode (V-mode) approach is well established for planar structures. However, the current V-mode theory is limited in scope in that it can only be applied to conventional motion sensors (i.e., accelerometers). In this study, in order to estimate the sound power of vibrating beam and plate structure by using polyvinylidene fluoride (PVDF) films as sensors, a PVDF-based radiation mode (C-mode) approach concept is introduced to determine the sound power radiation from the output signals of PVDF films of the vibrating structure. The proposed method is a hybrid of vibration measurement and numerical calculation of C-modes. The proposed C-mode approach has the following advantages: (1) compared to conventional motion sensors, the PVDF films are lightweight, flexible, and low-cost; (2) there is no need for special measuring environments, since the proposed method does not require the measurement of sound fields; (3) In low frequency range (typically with dimensionless frequency kl < 4), the radiation efficiencies of the C-modes fall off very rapidly with increasing mode order, furthermore, the shapes of the C-modes remain almost unchanged, which means that the computation load can be significantly reduced due to the fact only the first few dominant C-modes are involved in the low frequency range. Numerical simulations and experimental investigations were carried out to verify the accuracy and efficiency of the proposed method. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Mao, Q.; Zhong, H. Sound Power Estimation for Beam and Plate Structures Using Polyvinylidene Fluoride Films as Sensors. Sensors 2017, 17, 1111.
Mao Q, Zhong H. Sound Power Estimation for Beam and Plate Structures Using Polyvinylidene Fluoride Films as Sensors. Sensors. 2017; 17(5):1111.Chicago/Turabian Style
Mao, Qibo; Zhong, Haibing. 2017. "Sound Power Estimation for Beam and Plate Structures Using Polyvinylidene Fluoride Films as Sensors." Sensors 17, no. 5: 1111.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.