摘要
针对结构在xy平面内具有无限周期性而在z方向上具有有限尺寸的特性,提出了平面无限板类声子晶体的概念。根据结构特征,将平面波展开法和有限元法的基本理论相结合从而建立了平面波展开有限元结合法。通过与借助于有限元软件计算求得的能带结构进行对比,从不同材料组分、不同散射体形状以及不同组元数等多角度检验了该方法对平面无限板类声子晶体结构的精确性和适用性。为工程上减振降噪领域板类声子晶体的应用提供了全新有效的理论研究方法。
The concept of plane-infinite plate-like phononic crystal(PC)is proposed,which has the infinite periodicity in x-y plane and finiteness in z-direction.The plane wave expansion(PWE)and finite element(FE)methods are coupled and formulized to calculate the band structures of the proposed periodic elastic composite structures based on the typical geometric properties.Comparing the results with those calculated by adopting commercial FE software,the applicability and accuracy are verified from different points such as component materials,scatter shapes,component numbers.The paper provides a new and effective theoretical investigation method for plate-like PC in the field of vibration and noise reduction in engineering.
作者
钱登辉
史治宇
QIAN Deng-hui;SHI Zhi-yu(College of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2019年第5期793-800,共8页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(11847009)
江苏高校优势学科建设工程资助项目
苏州科技大学科研基金资助项目(XKQ2018007)
