Sound Insulation Performance of Pyramidal Truss Core Cylindrical Sandwich Structure
金字塔形桁架芯圆柱夹心结构的隔声性能
ピラミッド型トラスコア円筒サンドイッチ構造の遮音性能
피라미드형 트러스 코어 원통형 샌드위치 구조의 방음 성능
Rendimiento del aislamiento acústico de la estructura sándwich cilíndrica con núcleo de armadura piramidal
Performance d'isolation phonique de la structure sandwich cylindrique à noyau en treillis pyramidal
Звукоизоляционные характеристики цилиндрической сэндвич-конструкции с сердечником пирамидальной фермы
Yu-Zhou Wang 王雨舟, Li Ma 马力
Center for Composite Materials, Harbin Institute of Technology, Harbin, 150080, China
中国 哈尔滨 哈尔滨工业大学复合材料与结构研究所
Recently, cylindrical structures have been exploited in various fields due to their excellent mechanical properties. With the increase in the application of cylindrical shell structures, researchers are paying more and more attention to its acoustic performance and sound insulation applications. By inserting the pyramidal truss lattice into the cylindrical shell structure, a cylindrical sandwich structure is obtained and the sound insulation performance of the structure is investigated.
The space-harmonic expansion method and the principle of virtual work are employed to establish a theoretical model for the acoustic analysis of cylindrical sandwich structures. The vibro-acoustic coupling is taken into account by imposing the velocity continuity condition at the fluid–solid interface. The sound transmission loss (STL) performance of the structure is examined by establishing both theoretical and finite element models. Subsequently, the influence of various parameters on sound transmission loss is researched and analyzed.