Mechanical Shock Test
Altair Employee1. I need to do an analysis by giving an acceleration of 20g (longitudinal) and 8g (transverse) for 50ms and similar for 65ms. How do i go about it. Can i do it on optistruct or Radioss.
2. Also i need to do a vibration test for the same component between 7 Hz and 50 Hz and back to 7 Hz traversed in 15 minutes. I have to do this for 12 cycles.
Thanks in advance.
Answers
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Altair Forum User said:
1. I need to do an analysis by giving an acceleration of 20g (longitudinal) and 8g (transverse) for 50ms and similar for 65ms. How do i go about it. Can i do it on optistruct or Radioss.
You can use OptiStruct. Calculate the load for 20G and use it as FORCE.
Altair Forum User said:2. Also i need to do a vibration test for the same component between 7 Hz and 50 Hz and back to 7 Hz traversed in 15 minutes. I have to do this for 12 cycles.
You can use Frequency response subcase to model the same.
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Altair Forum User said:
You can use OptiStruct. Calculate the load for 20G and use it as FORCE.
You can use Frequency response subcase to model the same.
@Prakash Pagadala How do I do w.r.t time? I need to apply 20G for 5ms. Can I use the TSTEP card.
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Hi @tintumat
Please check this tutorial OS-T: 1315 Modal Transient Dynamic Analysis of a Bracket
You need to use Transient response subcase if you want to provide time.
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Altair Forum User said:
Hi @tintumat
Please check this tutorial OS-T: 1315 Modal Transient Dynamic Analysis of a Bracket
You need to use Transient response subcase if you want to provide time.
@Prakash Pagadala how can i ask for acceleration and displacement as output as well. i did for displacement as shown in the tutorial.
my output reuqest is stated as so 'Acceleration exerted to the part to be measured with a minimum of 2 kHz bandwidth. (ACCELERATION)'
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Hi @tintumat
In Control cards>> Global output request>> Activate Acceleration and displacement
<?xml version="1.0" encoding="UTF-8"?>
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