Browsing by Author "Mottershead, J. E."

Now showing items 1-10 of 10

    • Article  

      Assignment of natural frequencies by an added mass and one or more springs 

      Kyprianou, Andreas; Mottershead, J. E.; Ouyang, H. (2004)
      The problem of assigning natural frequencies to a multi-degree-of-freedom undamped system by an added mass connected by one or more springs is addressed. The added mass and stiffnesses are determined using receptances from ...
    • Article  

      Estimation of rotational frequency responses 

      Mottershead, J. E.; Kyprianou, Andreas; Ouyang, H. (2003)
      Rotational frequency response functions are potentially valuable for structural damage detection but are difficult to obtain because of the practical problems of applying a pure moment. In the literature various indirect ...
    • Article  

      An inverse method to assign receptances by using classical vibration absorbers 

      Zhu, J.; Mottershead, J. E.; Kyprianou, Andreas (2009)
      The classical mass-spring absorber can be thought of as a very simple structural modification. In this paper the inverse problem of assigning receptances to a dynamic system by using one or more simple mass-spring absorbers ...
    • Article  

      Minimum relative entropy criterion for damage detection and location 

      Kyprianou, Andreas; Mares, C.; Charalambous, Charalambos D.; Mottershead, J. E. (2007)
      Relative entropy has been employed, as an alternative to other regularization methods, in solving ill-conditioned linear inverse problems. Damage detection when treated as structural modification imparted by the damage ...
    • Article  

      Minimum relative entropy criterion for damage detection and location 

      Kyprianou, Andreas; Mares, C.; Charalambous, C. D.; Mottershead, J. E. (2007)
      Relative entropy has been employed, as an alternative to other regularization methods, in solving ill-conditioned linear inverse problems. Damage detection when treated as structural modification imparted by the damage ...
    • Article  

      Minimum relative entropy criterion for damage detection and location 

      Kyprianou, Andreas; Mares, C.; Charalambous, Charalambos D.; Mottershead, J. E. (2007)
      Relative entropy has been employed, as an alternative to other regularization methods, in solving ill-conditioned linear inverse problems. Damage detection when treated as structural modification imparted by the damage ...
    • Article  

      Modelling and Simulation of Bolted Joints under Harmonic Excitation 

      Oldfield, M.; Ouyang, H.; Mottershead, J. E.; Kyprianou, Andreas (2003)
      Bolted metal joints under harmonic loading exhibit hysteretic behaviour. This is the major source of damping in frame structures with bolted joints, since the material damping of these structures is very small. In this ...
    • Article  

      Structural modification. Part 1: Rotational receptances 

      Mottershead, J. E.; Kyprianou, Andreas; Ouyang, H. (2005)
      The inverse problem of assigning natural frequencies and antiresonances by a modification to the stiffness, mass and damping of a structure is addressed. Very simple modifications such as the addition of masses and grounded ...
    • Article  

      Structural modification. Part 2: Assignment of natural frequencies and antiresonances by an added beam 

      Kyprianou, Andreas; Mottershead, J. E.; Ouyang, H. (2005)
      In this paper the inverse structural modification problem is solved in order to determine the dimensions of the cross-section of a beam that when added to an original structure will assign natural frequencies or antiresonances ...
    • Conference Object  

      Uncertain systems: Modelling and updating 

      Kyprianou, Andreas; Mottershead, J. E. (Affiliation: Departament of Mechanical and Manufacturing Engineering, University of Cyprus, 1678, Nicosia, PortugalAffiliation: Department of Engineering, University of Liverpool, L69 3GH, Liverpool, United KingdomCorrespondence Address: Kyprianou, A.Departament of Mechanical and Manufacturing Engineering, University of Cyprus, 1678, Nicosia, Portugalemail: akyp@ucy.ac.cy, 2011)
      In this article a new method, which relies on the concept of density matrix, for modelling un- certain vibrating structures is presented. The density matrix is defined as the product of the normalized to unity mode shape ...