Evolutions of the vibration modes of rotating thin-walled cylindrical shell under connection bolts loosening

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-02-28 DOI:10.1016/j.tws.2025.113119

Jiucun Wei, Zhiguang Song

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引用次数: 0

Abstract

Rotation cylindrical shells are common structures in aerospace engineering. They are always connected to the transmission system with bolts. Under high-speed rotation, bolts are prone to loosening. Therefore, it is necessary to study the vibration behaviors of the rotating cylindrical shell under the condition of bolts loosening. In this paper, mode localization behaviors of the rotating cylindrical shell under connection bolts loosening are investigated. Hamilton's principle and an extend assumed mode method are used to formulate the equation of motion. Bolts are simulated with artificial springs, and the mode functions of cylindrical shell with free boundary conditions are derived by using Rayleigh-Ritz method. The gyro term is obtained, and the traveling wave solution of the rotating structures is explained. Four typical bolt loosening types are analyzed, and the mode localization caused by local bolt loosening is found and verified by the experiment. The generation mechanism of mode localization is revealed, and the influence of the number of loose bolts on the degree of mode localization is quantitatively analyzed by introducing the modal confidence criterion. The evolution of the mode localization shape of cylindrical shell with rotating speed and its influence on the critical speed under different bolt loosening boundary conditions 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.