On the describing functions for dampers with freeplay and dry friction for studying nonlinear oscillations

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-04-03 DOI:10.1016/j.ast.2025.110191

Breno M. Castro , Wellington L. Paulo Jr , Douglas D. Bueno , Paulo J. Paupitz Gonçalves

引用次数: 0

Abstract

This work presents a novelty in the mathematical formulation of a damper with freeplay for structural dynamics analysis in the frequency domain. This theoretical model represents the basis for the application of the harmonic balance technique for simulating problems with nonlinear characteristics. The predictions of the mathematical model proposed in this work are confronted with results obtained on a ground test of an apparatus composed of a damper and an attachment with a fixed amount of freeplay. The results indicate that the proposed mathematical model can capture the nonlinear characteristics of a damper with freeplay and, therefore, be used for nonlinear structural dynamics analyses, mainly focused on aeroelastic stability.

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研究非线性振动的自由摩擦和干摩擦阻尼器的描述函数

这项工作提出了一个新颖的数学公式的阻尼器与自由发挥的结构动力学分析在频域。该理论模型为谐波平衡技术在非线性问题模拟中的应用奠定了基础。这项工作中提出的数学模型的预测与在一个由阻尼器和固定自由运动的附件组成的装置的地面试验结果相矛盾。结果表明，所建立的数学模型能够很好地反映自由阻尼器的非线性特性，因此可以用于非线性结构动力学分析，主要集中在气动弹性稳定性方面。

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

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.