Experimental and numerical investigation of vibration characteristics of X-frame CFRP sandwich plates

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-08 DOI:10.1016/j.tws.2025.113942

Min Tang , Longjun Chen , Weimin Jiang , Zhikang Liu , Jiayi Liu , Wei Huang

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引用次数: 0

Abstract

The vibration performance of the X-frame carbon fiber reinforced polymer (CFRP) sandwich plates was studied by experiments and simulations in this paper. The research focused on the influences of foam filling, relative density (RD) and designed parameters of the core on the modal characteristic and surface mean quadratic velocity of the plates. Firstly, the vibration modals and mean quadratic velocity of X-frame sandwich plates with or without foam-filled were measured in vacuum as well as underwater through experiments. Then, numerical simulation analysis was carried out, and the results by numerical simulation analysis were highly consistent with the experimental results. Finally, the vibration performance of X-frame sandwich plates with different parameters was researched by the validated numerical simulation analysis. The results of experiments indicated that filling low-density foam into the core could increase the natural frequencies slightly and reduce the mean quadratic velocity at the natural frequencies of the plates. The low-density foam played a role in peak shaving. Improving the relative density of the core increased the natural frequencies significantly and reduced the overall mean quadratic velocity of the plates. The influence of parameter variations on vibration performance was discussed based on the favorable agreement observed between the results by experiment and simulation. The simulation results showed that the 45° X-frame sandwich plate had the smallest surface mean quadratic velocity compared with the other three designed angles including 40°, 55°, and 70° when the relative density of the core was same.

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x -框架CFRP夹芯板振动特性试验与数值研究

通过实验和仿真研究了x -框架碳纤维增强聚合物（CFRP）夹层板的振动性能。研究了泡沫填充、相对密度和芯材设计参数对板的模态特性和表面平均二次速度的影响。首先，通过实验测量了x -框架夹层板在真空和水下的振动模态和平均二次速度。然后进行数值模拟分析，数值模拟分析结果与实验结果高度吻合。最后，通过验证的数值模拟分析，研究了不同参数下x -框架夹层板的振动性能。实验结果表明，在芯内填充低密度泡沫可以略微提高板的固有频率，降低板在固有频率处的平均二次速度。低密度泡沫起到了剃峰的作用。提高堆芯的相对密度显著提高了固有频率，降低了整体平均二次速度。在实验结果与仿真结果吻合良好的基础上，讨论了参数变化对振动性能的影响。仿真结果表明，在堆芯相对密度相同的情况下，45°x -框架夹心板的表面平均二次速度比40°、55°和70°夹心板设计角度最小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.