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Found 5 results

  1. What is the difference between Frequency Response Analysis and Response Spectrum Analysis?
  2. Hello, Good Afternoon. I have a model to which I need to apply a base excitation. I am basically trying to simulate a forced vibration case wherein I have 2 load cases, which are as follows:- · LC1: 5 – 10 Hz : ±8 mm (Constant displacement) · LC2: 10–500 Hz : ±18 m/sec2 (Const. Acceleration) I am doing it with the FREQUENCY RESPONSE (MODAL) LOAD STEP. I have used all the standard cards that are required for such an analysis like SPCD, RLOAD, DLOAD, FREQ, TABLED1 etc. Let's say I am exciting my model in the X direction, I have checked DOF1(scaled to 1) and unchecked all other DOF's. But the results seem to directly vary with that scale factor which it should but aren't matching with my benchmark results.When i use TABRAND1 instead of TABLED1 i get satisfactory results but I am not sure if I am supposed to do so. I am yet to establish the correct methodology for this sort of forced vibration cases. Could you please help me out.
  3. Hi, Is that possible to couple heat transfer (transient) analysis and direct dynamic analysis? I tried to execute the same procedure indicated in OS-1080: Couple Linear Heat Transfer/ Structure Analysis, but it doesn't work, due to an unsupported subcase (I wrote "TEMP=1" for the SUBCASE_UNSUPPORTED like in the tutorial). Thank you for your help.
  4. Hello, I would like to know how I can simulate/model a mass-spring-damper system in HyperMesh to do a dynamic analysis and get system responses and FRF in acceleration?
  5. Hello Everyone, I have been working on Response spectrum Analysis. I have two loading condition. 1) 100g for 0.01ms and 2) 20g for 10ms Which will yield maximum stress ? Is there a way to co-relate the results? Thanks in Advance. -RathinaVel
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