The resistors are connected to form a wheatstone

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Unformatted text preview: SAS IP, Inc. 1–549 VM235: Frequency Response of a Prestressed Beam Overview Reference: R. D. Blevins, Formulas for Natural Frequency and Mode Shape, Van Nostrand Reinhold Co., pg. 144, equation 8-20. Analysis Type(s): Modal (ANTYPE=2) Element Type(s): 2-D Elastic Beam Elements (BEAM3) Electromechanical Transducer Elements (TRANS126) Input Listing: vm235.dat Test Case A beam is in series with an electromechanical transducer. With a voltage applied to the beam, determine the prestressed natural frequencies of the beam. Figure 235.1 Element Plot _ + EMTO Material Properties Ex = 169E3 DENS = 2332E-18 Beam Stiff = 112666.667 Gap Stiff = 20.022 Geometric Properties L = 150µm W = 4 µm H = 2 µm Initial Gap = 1 µm Gap = 0.999 µm Loading Volt = 150.162V Analysis Assumptions and Modeling Notes The beam is created using BEAM3 elements which are used in series with one TRANS126 element. The node that connects the transducer and beam is free to move in the X-direction, while the end node of the beam and th...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.

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