General Mechanical

General Mechanical

UNRESOANABLE MODAL and TRANSIENT ANALYSIS RESULTS

    • ssozen_72
      Subscriber

      Dear members,

      In the pre-stressed modal analysis of a historical clock tower, I got results unreasonable. Although I want to extract 7 modes in total, ANSYS calculates a total of 14 modes. The consecutive modes have the negative values of the previous one (shown in table). Could it be a negative frequency value? Besides, I calculate very small stress and displacement values in my transient analysis using a scaled bidirectional acceleration record. So much so that the structure behaves almost as if it is not affected by horizontal loading at all.

      I need your valuable help. Thank you very much in advance for your kind interest.

      Şahin SÖZEN

    • Ashish Khemka
      Ansys Employee


      Please refer to the following link for an analysis of Burj Khalifa. This may help you.
      Regards Ashish Khemka
    • ssozen_72
      Subscriber
      Thanks a lot for your response.
      Regards.
      ┼×ahin
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