Measurement of violin plate vibration by acoustical holography using boundary element method.
نویسندگان
چکیده
منابع مشابه
Vibration of Timoshenko Beam-Soil Foundation Interaction by Using the Spectral Element Method
This article presents an analysis of free vibration of elastically supported Timoshenko beams by using the spectral element method. The governing partial differential equation is elaborated to formulate the spectral stiffness matrix. Effectively, the non classical end boundary conditions of the beam are the primordial task to calibrate the phenomenon of the Timoshenko beam-soil foundation inter...
متن کاملThe Characterization of the Cylindrical Ultrasonic Transducer Surface Vibration Using Far-field Acoustical Holography
The paper presents the results of investigation on the distribution of vibrational velocity on the surface of the cylindrical piezoelectric ultrasound transducers using far-field acoustical holography. In contrast to the plane and focused transducers, for which method of acoustic holography using the Rayleigh integral is applicable [1], cylindrical sources require scanning over a closed surface...
متن کاملFast wideband acoustical holography.
Patch near-field acoustical holography methods like statistically optimized near-field acoustical holography and equivalent source method are limited to relatively low frequencies, where the average array-element spacing is less than half of the acoustic wavelength, while beamforming provides useful resolution only at medium-to-high frequencies. With adequate array design, both methods can be u...
متن کاملWideband acoustical holography
Patch Near-field Acoustical Holography (NAH) methods like SONAH and ESM are limited to relatively low frequencies where the average array inter-element spacing is less than half a wavelength, while beamforming provides useful resolution only at medium-to-high frequencies. With adequate array design, both methods can be used with the same array. But for holography to provide good low-frequency r...
متن کاملEnergy Harvesting Strategy Using Piezoelectric Element Driven by Vibration Method
This study demonstrates a method for harvesting the electrical power by the piezoelectric actuator from vibration energy. This paper presents the energy harvesting technique using the piezoelectric element of a bimorph type driven by a geared motor and a vibrator. The geared motor is a type of PWM controlled device that is a combination of an oval shape cam with five gears and a speed controlle...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acoustical Science and Technology
سال: 2002
ISSN: 1346-3969,1347-5177
DOI: 10.1250/ast.23.258