{"title":"Thermo-flexible coupled modeling and active control of thermally induced vibrations for a flexible plate","authors":"Xuan Sun, Jiaxi Jin, Zhaobo Chen","doi":"10.1016/j.tws.2025.113092","DOIUrl":null,"url":null,"abstract":"<div><div>Flexible spacecraft exhibit thermal-structural coupled effects in space thermal environment, leading to issues such as thermally induced deformations and vibrations. It is crucial to accurately predict the thermally induced dynamic behaviors of space structures and to actively control them. Accordingly, an integrated computational framework is constructed to work out the multi-physics coupled problem by synchronously solving the displacement and temperature fields. Firstly, the coupled thermoelasticity of the model is characterized by the thermo-flexible fully parameterized absolute nodal coordinate formulation (ANCF), wherein temperature gradients, utilized as nodal coordinates, are directly employed to calculate the temperature difference between arbitrary points. The viscoelastic constitutive relationship of the material is considered based on the Kelvin-Voigt model. Secondly, a comprehensive thermal analysis of the complicated space environment is conducted, and the transient heat conduction equation incorporating thermal radiation is derived via the weighted residual method. Furthermore, several numerical examples are analyzed, and corresponding finite element models are established to validate the effectiveness and accuracy of the developed coupling method. Subsequently, the temperature gradient feedback (TGF) control law is established by employing thermal actuators mounted on the structure's surface. Controlling thermal bending moments, generated by the temperature gradients resulting from the heat fluxes of the heaters, are used for active vibration suppression. Finally, the effects of different parameters on thermally induced vibrations in a cantilevered plate and corresponding active control strategies are examined. The findings in this work provide theoretical foundations and practical significance for predicting and actively controlling thermally induced responses in large flexible space structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113092"},"PeriodicalIF":5.7000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823125001867","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
Flexible spacecraft exhibit thermal-structural coupled effects in space thermal environment, leading to issues such as thermally induced deformations and vibrations. It is crucial to accurately predict the thermally induced dynamic behaviors of space structures and to actively control them. Accordingly, an integrated computational framework is constructed to work out the multi-physics coupled problem by synchronously solving the displacement and temperature fields. Firstly, the coupled thermoelasticity of the model is characterized by the thermo-flexible fully parameterized absolute nodal coordinate formulation (ANCF), wherein temperature gradients, utilized as nodal coordinates, are directly employed to calculate the temperature difference between arbitrary points. The viscoelastic constitutive relationship of the material is considered based on the Kelvin-Voigt model. Secondly, a comprehensive thermal analysis of the complicated space environment is conducted, and the transient heat conduction equation incorporating thermal radiation is derived via the weighted residual method. Furthermore, several numerical examples are analyzed, and corresponding finite element models are established to validate the effectiveness and accuracy of the developed coupling method. Subsequently, the temperature gradient feedback (TGF) control law is established by employing thermal actuators mounted on the structure's surface. Controlling thermal bending moments, generated by the temperature gradients resulting from the heat fluxes of the heaters, are used for active vibration suppression. Finally, the effects of different parameters on thermally induced vibrations in a cantilevered plate and corresponding active control strategies are examined. The findings in this work provide theoretical foundations and practical significance for predicting and actively controlling thermally induced responses in large flexible space structures.
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.
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