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Elastic bearing of ropeway towers on top of a hotel building A concept of an elastic bearing system by reinforced rubber elements was developed for the insulation of vibrations and structure‐borne noise of two girders, two deflection towers and a motor station of a circular ropeway on top of a newly constructed building. The target was to reduce the vibration immissions as well as the noise which is radiated from transmitted structure‐borne noise. The main difficulties occurred in defining realistic dynamic forces and applicable impedances of the building structure. The design was carried out by the aid of three‐dimensional finite‐element models. The results of measurements while the ropeway was set into operation showed that the constructions work properly and the contractual target criteria were met. [ABSTRACT FROM AUTHOR]

It is pivotal to predict the multiaxial vibration fatigue life during mechanical structural dynamics design. An algorithm of the finite element method implementation for multiaxial high cycle fatigue life evaluation is proposed, on the basis of elastic evolution model of continuum damage mechanics. By considering structural dynamic characteristics, namely, resonant frequencies and mode shapes, this algorithm includes a modal analysis and harmonic analysis, which makes this different from existing fatigue life prediction methods. A 10% decrease in the resonant frequency is regarded as the failure criterion. A critical damage value was obtained, which indicates mesocrack initiation fulfilment. To validate the effectiveness of the algorithm, auto-phase sine resonance track-and-dwell experiments were conducted on notched cantilever beams made of Ti-6Al-4V alloy. The life predictions are conservative and in good agreements with the experimental results, which are mainly distributed within a scatter band of 2. This investigation could provide technical support for structural dynamics design and the analysis of reusable spacecraft. [ABSTRACT FROM AUTHOR]

Based on energy functional and with the inclusion of high-order incompatible dynamic displacement modes, a formulation for 3-D finite dynamic element method (DEM) is developed and a new 8-node solid element is derived in this paper. Numerical results exhibit that the present method provides the most economical and efficient solution when compared with the usual FEM and DEM. Copyright © 2000 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]