Search results for query: *

Thx amanuensis, but in this book i didn't found this equation ξfriction and the chapter 30 is about VIBRATION OF STRUCTURES INDUCED BY FLUID FLOW

hello, does nastran 2012 segment to segment contact cannot includ friction? may i have any alternative. or i must change my model

hello thinx, I constraint the dofs 1.3.4.5.6 dof and i apply a sine wave at the clamped end but when i plot the results the beam translate in the y direction. i dont obtaine the mode shape. have you any proposition. the attached file is the bdf card of the...

Hello, I wont to model the shaker vibration using sine wave using msc nastran. this shaker is monted at the climped end so i constraint the 1..3.4.5.6 dof and i apply a sinusoidal force at this climped end. the shape i found are wrong. may some help me

thx, i want to determine the modal damping values from a frequency responce analysis or a transient analysis.

Thx, eta is the modal damping?? can you submit please the document or the reference for this equation? Cheers,

Hi, how can i using freqyency response analysis retreive the modal damping value? thx

hi, can you dtermine the strain energy to calculate the damping?? thx regard

Hello, Can'I using a modal analysis determine the effect of friction on the modal damping value of a structure? or I must apply a sinusoidal force and guettig the the damping value correspending to the modal frequency. thx

or i must applay a sunusoidal force and then determin the modal damping

hello, Can i determine the effect of friction on the modal damping values? using a finite element method

i determine the damping using the strain energy methode by the stress element and the strain element of every bending mode

using sol 109 or 112 i can't get the modal analysis. i attached my .bdf file. i apply the following time dependent force t f 0 0 0.0075 45 0.015...

Hello olgola, Thanks for the reply the problem definition is: I work with msc nstran with patran 12.2. I use to simulate a sample excited with a shaker. i must imput a sunusoidal displacement at the clamped end of the sample and then i recover the response from the free end. Then, i must...

thx [smile] , so can i have the modal damping and the friction damping of the bending modes?

thx again, can you tell if nastran can determine the damping effect of friction between to plate.

thx, I work with msc nstran with patran 12.2.

hi, i need to simulate a sample excited with a shaker. i must imput a sunusoidal displacement at the clamped end of the sample and the i recover the response from the free end . i use the dirct frequency response analysis. i ask if some one can help me to imput the sinusoidal displacement.

Can I add contact with friction in normal modes analysis sol(103) using Msc Nastran? If not is there any other alternative? thinks

this is the detail USER FATAL MESSAGE 3060 (PREFACE) - AUTHORIZATION ERROR *** UNABLE TO OBTAIN LICENSES FOR Nastran Solver PLEASE REFER TO THE LOG FILE FOR ADDITIONAL DETAILS thx