Next Article in Journal
The Use of the Kinetic Theory of Gases to Simulate the Physical Situations on the Surface of Autonomously Moving Parts During Multi-Energy Vibration Processing
Next Article in Special Issue
Design, Experimental and Numerical Characterization of 3D-Printed Porous Absorbers
Previous Article in Journal
Nanoparticles in Construction Materials and Other Applications, and Implications of Nanoparticle Use
Previous Article in Special Issue
Damping Enhancement Using Axially Functionally Graded Porous Structure Based on Acoustic Black Hole Effect
Open AccessArticle

Sound Radiation Analysis of Constrained Layer Damping Structures Based on Two-Level Optimization

1
School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2
State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(19), 3053; https://doi.org/10.3390/ma12193053
Received: 13 August 2019 / Revised: 5 September 2019 / Accepted: 19 September 2019 / Published: 20 September 2019
(This article belongs to the Special Issue Damping Materials)
Constrained layer damping (CLD) is an effective method for suppressing the vibration and sound radiation of lightweight structures. In this article, a two-level optimization approach is presented as a systematic methodology to design position layouts and thickness configurations of CLD materials for suppressing the sound power of vibrating structures. A two-level optimization model for the CLD structure is developed, considering sound radiation power as the objective function and different additional mass fractions as constraints. The proposed approach applies a modified bi-directional evolutionary structural optimization (BESO) method to obtain several optimal position layouts of CLD materials pasted on the base structure, and sound power sensitivity analysis is formulated based on sound radiation modes for the position optimization of CLD materials. Two strategies based on the distributions of average normalized elemental kinetic energy and strain energy of the base plate are proposed to divide optimal position layouts of CLD materials into several subareas, and a genetic algorithm (GA) is employed to optimally reconfigure the thicknesses of CLD materials in the subareas. Numerical examples are provided to illustrate the validity and efficiency of this approach. The sound radiation power radiated from the vibrating plate, which is treated with multiple position layouts and thickness reconfigurations of CLD materials, is emphatically discussed. View Full-Text
Keywords: constrained layer damping; two-level optimization; bi-directional evolutionary structural optimization; sound radiation power constrained layer damping; two-level optimization; bi-directional evolutionary structural optimization; sound radiation power
Show Figures

Figure 1

MDPI and ACS Style

Zhang, D.; Wu, Y.; Chen, J.; Wang, S.; Zheng, L. Sound Radiation Analysis of Constrained Layer Damping Structures Based on Two-Level Optimization. Materials 2019, 12, 3053.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop