| Abstract: | Determination of eigenvalues and modal shapes for members and frames. For the calculation of stability‐endangered members and frames the determination of eigenvalues and modal shapes has central meaning. Because from the literature numerous, partly strong different analyses are known, the question will be clarified, which procedure will be best suitable due to the specific problem definition. The paper deals with two solutions in detail, with a modified vector iteration method and a particularly adapted matrix decomposition method. Beyond that the determination of eigenvalues and modal shapes by EDV‐programs and the evaluation of their results are explained. |
