Analysis of Piezoelectric Impact Absorbers

• Main Authors: Siao-wei Syu, 許校瑋
• Other Authors: Yii-Mei Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/33616001917349135770

碩士 === 國立中央大學 === 機械工程研究所 === 99 === The　purpose　of　this　research　is　to　reduce　the　vibration　of　a　cantilever　beam　by　using　piezoelectric　impact　absorbers.　Ｅach　absorber　consists　of　a　piezoelectric　sheet,　inductances,　resistances　and　a　diode　which　simulating　the　mechanical　impact　effect　by　switching　of　the　circuit　on　and　off. A　composite　cantilever　beam　is　subjected　to　an　external　harmonic　force　with　its　frequency　equal　to　the　natural　frequency　of　the　beam.　The　equations　of　motion　of　the　beam　are　derived　by　Hamilton''s　principle　and　discretized　by　Galerkin''s　method.　The　equations　of　motion　of　the　beam　and　the　circuit　equations　of　impact　absorbers　are　solved　simultaneously.　The　numerical　results　show　that　piezoelectric　impact　absorbers　are　more　effective　than　the　traditional　piezoelectric　absorbers.