Sound Radiation of Orthogonal Antisymmetric Composite Laminates Embedded with Pre-Strained SMA Wires in Thermal Environment

Abstract

The interest of this article lies in the sound radiation of shape memory alloy (SMA) composite laminates. Different from the traditional method of avoiding resonance sound radiation of composite laminates by means of structural parameter design, this paper explores the potential of adjusting the modal peak of the resonant acoustic radiation by using material characteristics of shape memory alloys (SMA), and provides a new idea for avoiding resonance sound radiation of composite laminates. For composite laminates embedded with pre-strained SMA, an innovation of vibration-acoustic modeling of SMA composite laminates considering pre-stain of SMA and thermal expansion force of graphite-epoxy resin is proposed. Based on the classical thin plate theory and Hamilton principle, the structural dynamic governing equation and the frequency equation of the laminates subjected to thermal environment are derived. The vibration sound radiation of composite laminates is calculated with Rayleigh integral. Effects of ambient temperature, pre-strain, SMA volume fraction, substrate ratio, and geometrical parameters on the sound radiation were analyzed. New laws of SMA material and pre-strain characteristics on sound radiation of composite laminates under temperature environment are revealed, which have theoretical and engineering functional significance for vibration and sound radiation control of SMA composite laminates.

Electro-structural modeling of smart laminated composite plate under hygrothermal environment for optimum vibration energy harvesting

“…In civil engineering and military applications laminated composite beams, plates, shells, and other different shapes can be employed. Particularly, weight-sensitive engineering structures made up of symmetric, asymmetric and anisotropic composite plates are widely used (Huang et al, 2020; Joshan et al, 2020; Li et al, 2020; Qin et al, 2019). In applications of such composite structures as blades of wind-turbines and fans, there is a wide scope of energy harvesting for driving the micro-power devices through the current IoT technology.…”

Acoustic Radiation Performance of a Composite Laminated Plate Subjected to Local Temperature

“…e advantage of this approach is that it can work with some combinations of classical boundary conditions, such as simply supported and clamped boundary conditions and a few cases involving free edges. Huang et al [7] developed a vibration-acoustic model of simply supported shape memory alloy (SMA) composite laminate plates considering the prestaining of SMA and the thermal expansion force of graphite-epoxy resin. Li and Li [8] derived theoretical formulations for the vibration and sound radiation of a simply supported asymmetric laminated plate considering the effects of thermal environments.…”

Modal Performance Analysis of Compressor for Active Control of Acoustic Radiation

“…Due to the similarity and correlation with structural modes, the theoretical research of acoustic radiation modes has become mature [11][12][13][14]. However, in solving practical active control problems, the research conditions are still quite harsh.…”

“…By mode decoupling of the motion equation, it can be recognized that the structure motion is the superposition of multi-order vibration modes. Therefore, the analysis of vibration problem will be converted into the study of excitation degree of each order of modes, so as to realize the suppression of vibration from the mode angle.Due to the similarity and correlation with structural modes, the theoretical research of acoustic radiation modes has become mature [11][12][13][14]. However, in solving practical active control problems, the research conditions are still quite harsh.…”