TY - JOUR AU - Rainer, J.H. AU - Pernica, G. PY - 1994/09/01 Y2 - 2024/03/29 TI - Determination of dynamic properties of nonlinear structures using thepull-release test JF - Canadian Acoustics JA - Canadian Acoustics VL - 22 IS - 3 SE - Proceedings of the Acoustics Week in Canada DO - UR - https://jcaa.caa-aca.ca/index.php/jcaa/article/view/907 SP - 177-178 AB - For the determination of the dynamic properties-natural frequencies, mode shapes and damping-of an existing structure, a number of experimental methods are available. Among the most common ones are: the shake table test for small and medium size structures; excitation by a shaker mounted on the structure and locating the resonances by sweeping across a frequency band either slowly or in discrete steps; monitoring the ambient vibrations and determining the properties by signal analysis; and pulling (or pushing) the structure and suddenly releasing it and measuring the resulting decaying vibrations. This pull-release test is one of the simplest dynamic methods for determining a complete set of dynamic properties. While it is usually employed at low amplitudes of vibration, the method can also be employed at large amplitudes and consequently to obtain amplitude-dependent dynamic properties for structures with non-linear deformation and damping properties. This presentation focuses on the theoretical and analytical issues that have to be considered in planning such a test and interpreting the results ER -