Investigation on microperforated sandwich structures with light weight and broadband sound absorption: Influences of foam filling and core configurations

作者：Jingbo Yang, Yongfeng Jiang, Han Meng, Qing Ma, Xiangchao Feng, Zhaorui Gao, Cheng Shen, Tian Jian Lu · 发表于：Journal of Sandwich Structures & Materials · 年份：2025 · DOI：10.1177/10996362251316729 · 被引用次数：5 · 研究领域：Acoustic Wave Phenomena Research、Cellular and Composite Structures、Vehicle Noise and Vibration Control

Structures with light weight and broadband sound absorption is of vital importance for noise control applications in engineering practice. Foams exhibit broadband but poor low frequency sound absorption, micro-perforated sandwich structures conversely possess good sound absorption at low frequencies due to resonance, the bandwidth is however limited. Micro-perforated sandwich structures with foam filling are therefore proposed in the paper to obtain wideband low-frequency sound absorption. An integrated analytical, numerical and experimental research is conducted to investigate sound absorption and lightweight characteristics of four commonly used micro-perforated sandwich structures with honeycomb (PHSP), corrugated (PCSP), N hybrid (PNHSP) and honeycomb-corrugated (PHCSP) cores. An analytical model is built to estimate sound absorption coefficient (SAC) based on the acoustic impedance theory and Johnson-Champoux-Allard model. Numerical simulation and experimental measurement methods are conducted simultaneously to validate the analytical model. The influences and underling mechanism of foam filling and filling configurations are explored, and it is found that melamine foam filling can enhance low-frequency sound absorption bandwidth of micro-perforated sandwich structures, and half-filled foam can bring in higher absorption peak values than fully filled foam due to more violent resonance. To overall evaluate both the lightweight and sound absorption performance of varied sa...