dropped object analysis in SACS

can any body please explain about dropped object analysis in SACS.

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  • C.karthikeyan,

    The support conditions to which you refer are master degrees of freedom. These define which joints are retained when extracting the mode shape and mass matrix. The degrees of freedom are reduced to the master degrees of of freedom before performing the eigenvalue extraction. Refer to Section 2.1 of the dynpac manual for a discussion of retained degrees of freedom and more information on the matter. Essentially your mode shapes will "move" in the retained degrees of freedom that you have specified, so you can control to some extent which modes are extracted by the joints you select.

    Regards,

    Geoff