Dynamic frequency analysis of rotating double-layer conical thin shells coupled with semi re-entrant zero Poisson's ratio honeycomb sandwich annular plates

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-03 DOI:10.1016/j.tws.2025.113136

Yongqiang Li

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引用次数: 0

Abstract

This paper proposes a computational method based on the substructure synthesis approach to analyze the dynamic frequency of rotating double-layer conical thin shells coupled with semi re-entrant (SER) zero Poisson's ratio (ZPR) honeycomb sandwich annular plates (HSAP). The double-layer conical shell is divided into several conical shell substructures according to the position of the annular plate. The dynamic models of the conical shell and annular plate substructures are established based on the Flügge and Donnell-Mushtari thin shell/plate theories, incorporating centrifugal and Coriolis inertia forces. The displacements of the substructures are expressed as a combination of power series and Fourier series. All substructures are assembled using the continuity conditions for eight displacements and four forces at the coupling interfaces of adjacent substructures, and the global free vibration equation of the structure is constructed with the boundary conditions at the ends of the conical shell. The validity of the proposed method is verified through two examples. First, the results obtained using the proposed method are compared with those of the wave based method by converting the conical shell into a cylindrical shell and setting the rotational speed to zero. Second, the calculated dynamic frequencies of the rotating double-layer conical thin shells coupled with SER ZPR HSAP (SZHSAP) are compared with those obtained via the finite element method. Finally, the effects of various boundary conditions, rotational speeds, and geometric parameters of the conical shell and annular plate on the dynamic frequencies of the coupled structure are analyzed.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.