Bauwerksschwingungen Baudynamik  

           Are you confronted with a structural dynamics' problem??
      Three elements are characterizing a structural dynamics' problem:
 

   Basically: If we know two of the three we can determine the third.

The once standard problem when it came to civil engineering applications: Determination of H through measurement of  X and Y (Forced Vibration Testing, FVT) has mainly been replaced through Ambient Vibration Testing, AVT, in the last ten years. With AVT, the system dynamic characteristics are determined from processing response signals Y only. However, in this case, H is unscaled and thus does not contain any information on mass and stiffness. Both procedures, FVT as well as AVT, are also called Experimental Modal Analysis (Projects Langensand, Erfttal,  KW Eglisau, San Luzi).

The most simple problems are those, where the system response Y is measured only and where this response can be rated using standards. However, such standards are quite vague in Switzerland and Germany. As a consequence, the test engineer has to take responsibility based on experience. (Project  Stallikon).

The most beautiful problems are those, where all three elements X, H und Y can be determined experimentally As a consequence, the possible problem with Y can be solved through working either on X or H. Everything is under control! But the effort can be very large (Diss. Cantieni.pdf).

The most difficult problems are those where some ideas exist concerning the properties of  X und H and the engineer is asked to derive a prognosis concerning the system response Y. Success is quite rare in such cases (Project  Langensand).

                                          Structural dynamics' problems are never boring!
            Structural dynamics' problems have been our daily business for more than 35 years.

       We look forward to being challenged through your structural dynamics problem!