Instability analysis using component modes

This paper discusses substructuring techniques for instability and free vibration analyses within finite element applications. To date most of the techniques presented in the literature are applied to vibration problems. In this study the component mode method is applied for free vibrations and instability to plate bending problems and comparisons are made with regard to analytical solutions. It is pointed out that a lower degree of accuracy is obtained for instability problems as compared to corresponding vibration problems. In a separate study, instability frame problems using component modes are compared to other instability solution methods. Also, it is emphasized that substructuring techniques can be considered as attractive algorithms when using parallel computing environments.