Localized stochastic dynamic solution for laminated coupled open conical-cylindrical cabin system based on the condensation method

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2024-11-08 DOI:10.1016/j.tws.2024.112691

Chenchen Guo , Qingshan Wang , Tao Liu , Bin Qin

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Abstract

This paper proposed a technical solution for quickly and accurately solving the stochastic dynamic characteristics of laminated coupled open conical-cylindrical cabin system. On the basic of first-order shear deformation theory (FSDT), the two-dimensional spectral Chebyshev method was introduced to obtain a unified dynamic matrix that included laminated conical and cylindrical panels. The middle part of the cabin was selected as the target substructure, while the precise dynamic condensation theory was used as a tool to establish a local dynamic analysis model of the cabin system based on comprehensive consideration of complex boundary conditions, coupling conditions, random load excitation and other factors. From a numerical analysis perspective, the local-level dynamic responses obtained from the model were validated to match well with the global-level results from the finite element method. Based on this numerical validation, a dynamic parametric analysis scheme was proposed, focusing on the local dynamic characteristics of the target substructure. This scheme analyzed the impact of the structural parameters of the middle part of cabin on the dynamic behaviors of the cabin system, providing technical guidance for the design optimization of the cabin system in engineering applications.

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基于凝结法的层状耦合开放式圆锥-圆柱机舱系统局部随机动态解法

本文提出了一种快速准确求解层压耦合开放式圆锥-圆柱机舱系统随机动态特性的技术方案。在一阶剪切变形理论（FSDT）的基础上，引入二维频谱切比雪夫方法，得到包含层叠圆锥板和圆柱板的统一动力矩阵。选取机舱中部作为目标下部结构，以精确动力凝聚理论为工具，在综合考虑复杂边界条件、耦合条件、随机载荷激励等因素的基础上，建立了机舱系统的局部动力分析模型。从数值分析的角度来看，模型得到的局部动态响应与有限元方法得到的全局结果相吻合。在数值验证的基础上，提出了一种动态参数分析方案，重点分析目标下部结构的局部动态特性。该方案分析了客舱中部结构参数对客舱系统动态行为的影响，为客舱系统在工程应用中的优化设计提供了技术指导。

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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.