Characterisation of a dissipative assembly using structural intensity measurements and energy conservation equation

Structural intensity assessment on shells via a finite element approximation

“…The differentiation of the experimental data has been performed mainly by the finite difference method (Arruda and Mas, 1998;Schmidt, 2009) or by processing and filtering the data in its corresponding wavenumber domain (Arruda, 1992;Lopes et al, 2006;Morikawa et al, 1996;Pascal et al, 1996Pascal et al, , 2002Pascal et al, , 2006. Such approaches to assess the required spatial derivatives in combination with the described measuring techniques provided meaningful insights in the field, which includes the analysis of plates with peculiar features, such as plates with ribs or joints (Pascal et al, 2006;Semperlotti and Conlon, 2010;Zhang and Mann III, 1996), with cracks (Schmidt, 2009) and with orthotropic material properties (Lamberti and Semperlotti, 2013).…”

“…Examples of reported methods to analyze the vibrational energy are the laser Doppler vibrometry (Arruda and Mas, 1998;Morikawa et al, 1996;Pascal et al, 2002Pascal et al, , 2006Roozen et al, 2015;Schmidt, 2009;Vuye, 2011;Zhang and Mann III, 1996), acousticholography (Pascal et al, 1990;Saijyou, 2007), electronic speckle interferometry (Eck and Walsh, 2012), holographic interferometry (Pascal et al, 1996) and digital stroboscopic holography (Pires et al, 2018).…”

Structural intensity analysis of stepped thickness rectangular plates utilizing the finite element method

“…After that, measurement methods based on vibratory amplitudes in frequency and/or time domain and internal forces numerically estimated by the finite difference method are offered by Pavic [7], Fahy and Pierri [10] and Verheij [11]. In this context it is also worthy to mention frequency response technique introduced by Linjama and Lahti [12], near-field acoustical holography presented by Saijyou and Yoshikawa [13], and scanning laser vibrometer presented by Pascal et al [14]. Eck and Walsh [15] used electronic speckle pattern interferometry to measure vibrational energy flow in a plate with high energy flow boundary crossing, while Mandal et al [16] performed experimental investigation of power flow in thin technical orthotropic plates in frequency domain by the twotransducer method, using the cross-spectra of acceleration signals.…”

Structural intensity analysis of a large container carrier under harmonic excitations of propulsion system

“…The other measurement methods such as frequency response technique (Linjama and Lahti, 1992), near-field acoustical holography (Saijyou and Yoshikawa, 1996) and scanning laser vibrometer (Pascal et al, 2006) were also introduced. Analytical approaches to calculate structural intensity have been also carried out for the elastic vibration of thin cylindrical shells (Pavic, 1990 andWilliams, 1991), the elastic vibration of uniform infinite beam and plate (Xu and Koss, 1995), the torsional vibration of solid and hollow cylindrical bars (Pan and Pan, 1998), and the in-plane vibration of rectangular plates (Farag and Pan, 1998).…”