Optimization for sound transmission through a double-wall panel

Sound transmission through triple-panel structures lined with poroelastic materials

“…An advantage of a triple-panel structure is that the foam and air to increase the transmission loss [20,40,41]. In this section, the effect of 617 pressure in the air gaps is studied by considering air properties at different 618 altitudes as shown in Table 3, while the the ambient air remains the standard …”

“…The design of such multilayered panels 28 generally involves a multi-objective optimisation problem [18][19][20] with regard 29 to material selection, optimal layer thickness and sequencing, and the 30 application of the transfer matrix method to assist the acoustic analysis. 31 Lee et al [19] used a topology optimisation method for sound transmission 32 through one-dimensional (i.e.…”

Sound insulation performance optimization of lightweight sandwich panels

“…Because of the advantage of high stiffness to mass ratio lightweight sandwich panels have been widely used in aerospace and automobile industries. However, due to the light weight, sandwich panels are easy to transmit and radiate noise, which gives rise to a serious vibro-acoustic problem in practical applications [1,2]. To solve this problem, more and more researchers and practitioners are focusing on the acoustic performance optimization of lightweight sandwich panels.…”

“…Thamburaj and Sun [6] considered the optimization problem on sound insulation performance of anisotropic sandwich beams. Zhou et al [2] presented a bi-objective optimization model regarding double-walled panel by taking account of minimizing the weight and maximizing the acoustic transmission loss, and then illustrated the tradeoff between the two objectives via Pareto curve. Cameron et al [7] proposed an optimal design model with respect to the multi-functional load bearing vehicle body panel and explored the compromising solutions between the structural and acoustic performance.…”

“…Therefore, in the reported studies the sound insulation requirements for sandwich panels were usually treated as a constraint or a single objective so as to reduce the computational complexity. Although a few works have incorporated the acoustic objective into the multi-objective optimization model, the numerical exhibition on the complete distribution of Pareto optimal solutions is still an intractable issue [2,14]. Moreover, the influence of geometric constraints on the optimization results of sandwich panels is also rarely investigated in the reported studies.…”