Transient Modal Dynamic Analysis - enforced acceleration - zero acceleration as results

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi...I am working on a modal transient dynamic analysis of 40 spring mass Systems with an enforced acceleration. The enforced acceleration is the form of half sine curve, starting from 0 sec to 0.01 sec and then the Transfer function goes linearlly with 0 acceleration from 0.01 sec to 3 sec. For the spring mass Systems, each and every System is fixed in 123456 at the base Points and acceleration is enforced in the base Points in y-directions. So I have used SPC (fixed 123456) and SPCD (acceleration in 2). I want to calculate the Maximum acceleration of each and every mass of the Systems, but I am getting 0 accelerations for results. Can anyone please help me with that? I am attaching my HM file, fem file and Output file herewith.

 

Thanks in advance. 

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited September 2018

    Looks like units are not consistent in your model(Tabled entry for time vs accel).Please take a look and maintain units consistency in your model.

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