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  1. Domainpower

    Decouple the strain gauge measurement into individual modal response

    Hello Experts , I have a structure with multiple strain gauges attached to it. It is under fluctuating load. We know the response at any point is basically linear combination of scaled mode shapes. Is it possible to accurately decouple the total strain response from each gauge into modal...
  2. Domainpower

    Resonance in Balded Disk

    i would highly appreciate if someone could clear my doubt regarding resonance condition of a cyclic structure (say Bladed disk). Most of the articles mention two conditions to be respected: matching frequency ( excitation force and natural frequency) matching nodal diameter of the structure...
  3. Domainpower

    Resonance condition in Bladed disk (Cyclic structures)

    i would highly appreciate if someone could clear my doubt regarding resonance condition of a cyclic structure (say Bladed disk). Most of the articles mention two criteria to be respected: matching frequency ( excitation force and natural frequency) matching nodal diameter of the structure with...
  4. Domainpower

    Comparing Modal analysis FEA vs Experimental / High modal density problem

    I have a bladed disk with 21 blades. By FEA i have obtained the First family of in plane bending modes. See the attached file(FEA_results). http://files.engineering.com/getfile.aspx?folder=2720cf01-3b8b-4bfa-bb74-05a88111a23e&file=FEA_result.png After i did an experimental modal analysis using...
  5. Domainpower

    Missing nodal diameter

    Hi all , I am doing modal analysis of a rotating machine.In my first run i used a sector and applied cyclic symmetry analysis in ansys code. i tried to extract first 10 nodal diameters of bending modes. I was able to identify bending modes for nodal diameter = 0,3,4,5,6,7,8,9,10. However nodal...
  6. Domainpower

    Interpreting Modal analysis results with excitation frequencies

    Dear all , I have done modal analysis of a turbine using Finite element analysis and as output i have obtained a set of natural frequencies. Now regarding excitation frequency , i have this turbine rotating at a fixed rpm while the water jet will be acting on it at different positions as...
  7. Domainpower

    Initial gap problem in contact pair

    Problem description: I have a test model which has a radial clearance (initial gap)of 0.005 mm around two pins which are holding a mass rotating at some angular velocity(Centrifugal force).The model is created taking advantage of cyclic symmetry and symmetry plane. I used Ansys workbench 13.0...

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