Transverse free vibration of resonant nanoplate mass sensors: identication of an attached point mass Articles uri icon

publication date

  • January 2019

start page

  • 217

end page

  • 225

issue

  • 01

volume

  • 150

international standard serial number (ISSN)

  • 0020-7403

electronic international standard serial number (EISSN)

  • 1879-2162

abstract

  • In this paper we analyse for the first time the bending vibration of a nanoplate with an attached mass using the strain gradient elasticity theory for homogeneous Lamé material, under Kirchhoff-Love's kinematical assumptions. The exact eigenvalues of the nanoplate vibrating with an attached mass are obtained for a general case, and an approximate closed form expression is provided if the intensity of the mass is small with respect to the total mass of the nanoplate. The inverse problem of identifying a point mass attached on a simply supported rectangular nanoplate from a selected minimal set of resonant frequency data is also considered. We show that if the point mass is small, then the position of the point mass and mass size can be determined by means of closed form expressions in terms of the changes induced by the point mass on the first three resonant frequencies. The identification procedure has been tested on an extended series of numerical simulations, varying the scale parameter of the nanoplate's material and the position and size of the point mass...

keywords

  • Strain gradient theory
    Nanoplates with attached mass
    Nanosensors
    Transverse vibration
    Mass identification
    Inverse problems