Abstract: An estimator for the standard deviation of a natural frequency in terms of second-order statistical properties of the parameters of the system is derived. Results for one simple example is ...

Abstract: Structural dynamic responses of elevator counterweight systems with discontinuous connectivity (a large gap) between the counterweights and their frame are evaluated using the finite element techniques. External base ...

Abstract: Structural dynamic responses imposed by large base excitation and the effectiveness of an intermediate constraint in elevator counterweight systems are studied. A nonlinear contact finite element with nonlinear stiffness ...