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Active Control of the Seismic Behavior of a Euler-Bernoulli Beam Under Moving Load And Moving Mass Excitation by Using Piezo-Electric Patches

Ammar Fetrat, Farhad | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39308 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofooei, Fayaz
  7. Abstract:
  8. Smart materials and structures are among the research fields that have been expanded significantly in recent years. At a glance, a smart structure consists of sensors and actuators in which the recorded data are used to control the structural response against the applied lateral loadings, utilizing a specific control algorithm. In this regard, the Piezo-electric materials are widely used both as sensors and actuators in smart structures. In this thesis, the dynamic behavior of a simply supported Euler-Bernoulli beam that beside the effect of moving load or mass is subjected to support excitation is evaluated and the dynamic response of its mid-span is determined. Then, an extensive parametric is performed considering various parameters such as the mass and velocity of the moving load or mass, and also the frequency content of the applied earthquake records. Finally, it was tried to actively control the mid-span displacement of the beam, using piezo-electric patches and an appropriate control algorithm. In this part, the effect of the number and location of the piezo-electric patches on the efficiency of the control system is investigated
  9. Keywords:
  10. Active Control ; Nonlinear Three Dimentional Euler-Bernoulli Beam Theory ; Traveling Mass ; Nonlinear Three Dimentional Euler-Bernoulli Beam Theory ; Seismic Behavior ; Piezoelectric Materials ; Smart Materials

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