450 非線形電気機械インピーダンス変調法 : き裂を有するはりのモデル化と解析(構造物および機械の診断,OS-11 システムのモニタリングと診断,総合テーマ「伝統を,未来へ!」)

• 増田 新

  京工繊大

• 青木 淳祐

  京工繊大院

• 笹原 淳平

  京工繊大院

書誌事項

タイトル別名

• 450 Nonlinear Electro-Mechanical Impedance Modulation Method : Modeling and Analysis of a Cracked Beam

抄録

In this paper, a nondestructive, self-sensing, baseline free structural health monitoring methodology is presented, based on a nonlinear piezoelectric impedance modulation phenomenon which is induced by the contact acoustic nonlinearity (CAN) at the local structural damages of contact-type, i.e. damages and failures which come along with generation, growth and/or changes of contacting surfaces, such as cracks, debonding, preload-loss in bolted joints, etc. For an illustrative example, a mathematical model of a straight beam including a single transverse crack, coupled with a surface- bonded piezoelectric element is derived, utilizing the linear time- varying system theory. The time-varying admittance of the piezoelectric element is formulated in terms of a Zadeh's time-varying transfer function, and its first and second-order approximation is derived. The appropriateness of the first-order approximate which is called frozen-parameter solution is then discussed, and a damage evaluation index is presented based on this solution.

収録刊行物

• Dynamics & Design Conference

  Dynamics & Design Conference 2010 (0), _450-1_-_450-6_, 2010

  一般社団法人 日本機械学会

キーワード

• Structural health monitoring
• Damage detection
• Nondestructice testing
• Nonlinear acoustics
• Impedance
• Modulation

詳細情報

• CRID: 1390001205888838272
• NII論文ID: 110008740529
• DOI: 10.1299/jsmedmc.2010._450-1_
• ISSN: 24242993
• Web Site: https://www.jstage.jst.go.jp/article/jsmedmc/2010/0/2010__450-1_/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可