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So before you end this Modal Space series ... can you provide some last pieces of advice?
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- Experimental Techniques, 2015, v. 39, n. 1, p. 3, doi. 10.1111/ext.12142
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So what is the best way to make a free-free test set up... because nothing is really free-free.
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- Experimental Techniques, 2014, v. 38, n. 6, p. 3, doi. 10.1111/ext.12125
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So I am still confused about the MAC? What is a 'good' value for MAC?
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- Experimental Techniques, 2014, v. 38, n. 5, p. 5, doi. 10.1111/ext.12122
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Does gravity come into play when testing to find frequencies? Does orientation make a difference?
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- Experimental Techniques, 2014, v. 38, n. 4, p. 3, doi. 10.1111/ext.12108
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Do you need to mount triaxial accelerometers at all locations? Can that result in more channels and more cost?
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- Experimental Techniques, 2014, v. 38, n. 3, p. 3, doi. 10.1111/ext.12093
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An eigensolution gives us frequencies. But how do we get modes shapes?
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- Experimental Techniques, 2014, v. 38, n. 2, p. 3, doi. 10.1111/ext.12088
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Someone told me they used a Hanning window for an impact test. That doesn't seem right ... Can that distort data?
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- Experimental Techniques, 2014, v. 38, n. 1, p. 3, doi. 10.1111/ext.12072
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So now I have another question... if the hammer impacts a node, then there is no response elsewhere? That seems incorrect.
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- Experimental Techniques, 2013, v. 37, n. 6, p. 5, doi. 10.1111/ext.12060
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If we perform a roving impact test and impact many points, Is there any possibility of missing a mode?
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- Experimental Techniques, 2013, v. 37, n. 5, p. 3, doi. 10.1111/ext.12049
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Do you really need to measure FRFs? Or is a Transmissibility OK?
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- Experimental Techniques, 2013, v. 37, n. 4, p. 3, doi. 10.1111/ext.12043
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Can you explain the Complex Mode Indicator Function (CMIF) again? What are these crossover frequencies?
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- Experimental Techniques, 2013, v. 37, n. 2, p. 3, doi. 10.1111/ext.12015
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If the frequencies between test and model are close then is the model correlated? Do you really have to look at the mode shapes?
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- Experimental Techniques, 2013, v. 37, n. 3, p. 3, doi. 10.1111/ext.12021
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We updated a composite model but the properties seem to not be physical. Can the model be used for response studies?
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- Experimental Techniques, 2013, v. 37, n. 1, p. 4, doi. 10.1111/ext.12007
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So what really is a drive point FRF? Do you have to impact exactly at the same point?
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- Experimental Techniques, 2012, v. 36, n. 6, p. 1, doi. 10.1111/j.1747-1567.2012.00875.x
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How Free Does a Test Need To Be? Does It Really Matter That Much?
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- Experimental Techniques, 2012, v. 36, n. 5, p. 1, doi. 10.1111/j.1747-1567.2012.00846.x
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If you don't excite a structure at its natural frequency then how can you know what it is?
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- Experimental Techniques, 2012, v. 36, n. 4, p. 1, doi. 10.1111/j.1747-1567.2012.00847.x
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Simulating Built-in in the Lab.
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- Experimental Techniques, 2012, v. 36, n. 3, p. 1, doi. 10.1111/j.1747-1567.2012.00834.x
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Modal Space.
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- Experimental Techniques, 2012, v. 36, n. 2, p. 1, doi. 10.1111/j.1747-1567.2012.00822.x
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Sometimes when I have a double impact, I switch hammer tips to eliminate it. Is that OK?
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- Experimental Techniques, 2012, v. 36, n. 1, p. 1, doi. 10.1111/j.1747-1567.2011.00805.x
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Someone told me that you can't accept an FRF, when the spectrum has more than a 20 dB rolloff.
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- Experimental Techniques, 2011, v. 35, n. 6, p. 1, doi. 10.1111/j.1747-1567.2011.00791.x
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So if I use multiple reference vs single reference FRFs, is there really a difference in modal parameters?
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- Experimental Techniques, 2011, v. 35, n. 5, p. 1, doi. 10.1111/j.1747-1567.2011.00778.x
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Is there really a difference running a modal test with MIMO as opposed to SISO?
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- Experimental Techniques, 2011, v. 35, n. 4, p. 1, doi. 10.1111/j.1747-1567.2011.00769.x
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Why can't I run a modal test with one big shaker and just 'crank up the signal'?
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- Experimental Techniques, 2011, v. 35, n. 3, p. 1, doi. 10.1111/j.1747-1567.2011.00742.x
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Does the structure need to come to rest between impact measurements? Doesn't the damping window take care of that?
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- Experimental Techniques, 2011, v. 35, n. 2, p. 1, doi. 10.1111/j.1747-1567.2011.00711.x
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Will the support mechanism have any effect on FRFs?
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- Experimental Techniques, 2011, v. 35, n. 1, p. 1, doi. 10.1111/j.1747-1567.2010.00701.x
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Hey-I ran a test and got some extra modes. Does the overall test set up have any effect?
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- Experimental Techniques, 2010, v. 34, n. 6, p. 9, doi. 10.1111/j.1747-1567.2010.00680.x
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I hear mode participation all the time What does that really mean?
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- Experimental Techniques, 2010, v. 34, n. 5, p. 9, doi. 10.1111/j.1747-1567.2010.00662.x
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I am still confused about how the SDOF in modal space is related to the physical response?
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- Experimental Techniques, 2010, v. 34, n. 4, p. 13, doi. 10.1111/j.1747-1567.2010.00648.x
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Can the shaker stinger have any effect on the frequency response measurements?
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- Experimental Techniques, 2010, v. 34, n. 3, p. 11, doi. 10.1111/j.1747-1567.2010.00636.x
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Is there any effect in impact testing when hitting harder or softer with the different tips?
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- Experimental Techniques, 2010, v. 34, n. 2, p. 13, doi. 10.1111/j.1747-1567.2010.00627.x
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Curvefitting still seems like black magic to me. Can you explain transfer function, FRF, and parameters to me?
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- Experimental Techniques, 2010, v. 34, n. 1, p. 13, doi. 10.1111/j.1747-1567.2009.00610.x
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MODAL SPACE: When the transfer function is evaluated along the frequency axis, the damping is zero. Does this mean there is no damping in the system?
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- Experimental Techniques, 2009, v. 33, n. 6, p. 19, doi. 10.1111/j.1747-1567.2009.00589.x
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MODAL SPACE: If I run a shaker test with the input oblique to the global coordinate system, how do I decompose the force into the specific components in each direction?
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- Experimental Techniques, 2009, v. 33, n. 5, p. 11, doi. 10.1111/j.1747-1567.2009.00570.x
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MODAL SPACE: I made a stiffness change to the tip of a cantilever, beam but l can only shift the frequency so far. What's up?
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- Experimental Techniques, 2009, v. 33, n. 4, p. 9, doi. 10.1111/j.1747-1567.2009.00547.x
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MODAL SPACE: I made a stiffness modification to a free-free system. The flexible modes shifted down! What's up?
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- Experimental Techniques, 2009, v. 33, n. 3, p. 13, doi. 10.1111/j.1747-1567.2009.00513.x
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MODAL SPACE:Do you really need an accurate updated model? What are the effects if it is not perfect?
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- Experimental Techniques, 2009, v. 33, n. 2, p. 11, doi. 10.1111/j.1747-1567.2009.00492.x
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MODAL SPACE: Double Impacts are Undesirable. What about Multiple Impacts?
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- Experimental Techniques, 2008, v. 32, n. 6, p. 19, doi. 10.1111/j.1747-1567.2008.00432.x
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MODAL SPACE:Can You Describe Reciprocity? It Just Doesn’t Make Sense to Me.
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- Experimental Techniques, 2009, v. 33, n. 1, p. 11, doi. 10.1111/j.1747-1567.2008.00458.x
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MODAL SPACE: My Accelerometer is Not Overloaded, but the Measurement is Terrible. What Could be Wrong?
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- Experimental Techniques, 2008, v. 32, n. 5, p. 11, doi. 10.1111/j.1747-1567.2008.00408.x
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INTEGRATING DYNAMIC SYSTEMS MATERIALS INTO A MECHANICAL ENGINEERING CURRICULUM THROUGH INNOVATIVE USE OF WEB-BASED ACQUISITION AND HANDS-ON APPLICATION AND USE OF VIRTUAL GRAPHICAL USER INTERFACES Part 6: Design of a Measurement System to Integrate STEM Material
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- Experimental Techniques, 2008, v. 32, n. 4, p. 19, doi. 10.1111/j.1747-1567.2007.00220.x
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MODAL SPACE: My Coherence is Better in Some Measurements Than Others When Impact Testing. Am I Doing Something Wrong?
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- Experimental Techniques, 2008, v. 32, n. 4, p. 17, doi. 10.1111/j.1747-1567.2008.00383.x
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INTEGRATING DYNAMIC SYSTEMS MATERIALS INTO A MECHANICAL ENGINEERING CURRICULUM THROUGH INNOVATIVE USE OF WEB-BASED ACQUISITION AND HANDS-ON APPLICATION AND USE OF VIRTUAL GRAPHICAL USER INTERFACES Part 5: Graphical User Interfaces (GUIs) Assist in Solidifying Analytical Materials
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- Experimental Techniques, 2008, v. 32, n. 3, p. 18, doi. 10.1111/j.1747-1567.2007.00219.x
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INTEGRATING DYNAMIC SYSTEMS MATERIALS INTO A MECHANICAL ENGINEERING CURRICULUM THROUGH INNOVATIVE USE OF WEB-BASED ACQUISITION AND HANDS-ON APPLICATION AND USE OF VIRTUAL GRAPHICAL USER INTERFACES Part 4: Alternate Approaches for Teaching Fourier Series Applications
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- Experimental Techniques, 2008, v. 32, n. 2, p. 16, doi. 10.1111/j.1747-1567.2007.00218.x
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MODAL SPACE: Should More Residuals be Used to Improve a Curvefit? The Results Look Better When Many Extra Terms are Used.
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- Experimental Techniques, 2008, v. 32, n. 3, p. 13, doi. 10.1111/j.1747-1567.2008.00349.x
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MODAL SPACE: A Reference DOF is Needed for all Modal Software Systems. Why is the FFT Analyzer Reference Different?
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- Experimental Techniques, 2008, v. 32, n. 2, p. 9, doi. 10.1111/j.1747-1567.2008.00329.x
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- Publication type:
- Article
INTEGRATING DYNAMIC SYSTEMS MATERIALS INTO A MECHANICAL ENGINEERING CURRICULUM THROUGH INNOVATIVE USE OF WEB-BASED ACQUISITION AND HANDS-ON APPLICATION AND USE OF VIRTUAL GRAPHICAL USER INTERFACES Part 3: Dynamic Systems—Analytical and Experimental System Characterization
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- Experimental Techniques, 2008, v. 32, n. 1, p. 17, doi. 10.1111/j.1747-1567.2007.00217.x
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- Publication type:
- Article
INTEGRATING DYNAMIC SYSTEMS MATERIALS INTO A MECHANICAL ENGINEERING CURRICULUM THROUGH INNOVATIVE USE OF WEB-BASED ACQUISITION AND HANDS-ON APPLICATION AND USE OF VIRTUAL GRAPHICAL USER INTERFACES Part 2: Numerical Difficulties Processing Measured Data.
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- Experimental Techniques, 2007, v. 31, n. 6, p. 30, doi. 10.1111/j.1747-1567.2007.00216.x
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MODAL SPACE: Sometimes the Mode Shapes Appear to be Rotated from What is Expected. Are the Modes Wrong?
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- Experimental Techniques, 2008, v. 32, n. 1, p. 11, doi. 10.1111/j.1747-1567.2007.00306.x
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MODAL SPACE: Bolted Joints are Common in Structures. Can the Frequency Change Signifi cantly due to Joints?
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- Experimental Techniques, 2007, v. 31, n. 6, p. 25, doi. 10.1111/j.1747-1567.2007.00278.x
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MODAL SPACE: The Stability Diagram has Poles That are Not Indicated by the MMIF or CMIF; are They Really Modes?
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- Experimental Techniques, 2007, v. 31, n. 5, p. 17, doi. 10.1111/j.1747-1567.2007.00253.x
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