{"title":"Cover Image, Volume 6, Number 1, March 2026","authors":"","doi":"10.1002/msd2.70070","DOIUrl":null,"url":null,"abstract":"<p>Nonlinear vibration behavior of nuclear fuel rods supported by dimple-less spacer grids is investigated through experiments and modeling. Under sinusoidal excitation in water, the system exhibits softening–hardening responses and amplitude-dependent damping, captured by a Bouc–Wen–based model. Compared with traditional grids, the dimple-less design provides higher damping and reduces interaction forces, slippage, and impact-related effects at the rod–grid interface. These results offer valuable insights into fuel rod dynamics and demonstrate the potential of advanced grid designs to mitigate fretting and enhance structural reliability.\n\n <figure>\n <div><picture>\n <source></source></picture><p></p>\n </div>\n </figure></p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"6 1","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.70070","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"国际机械系统动力学学报(英文)","FirstCategoryId":"1087","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/msd2.70070","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Nonlinear vibration behavior of nuclear fuel rods supported by dimple-less spacer grids is investigated through experiments and modeling. Under sinusoidal excitation in water, the system exhibits softening–hardening responses and amplitude-dependent damping, captured by a Bouc–Wen–based model. Compared with traditional grids, the dimple-less design provides higher damping and reduces interaction forces, slippage, and impact-related effects at the rod–grid interface. These results offer valuable insights into fuel rod dynamics and demonstrate the potential of advanced grid designs to mitigate fretting and enhance structural reliability.
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