The problem of free transverse vibrations of beams with many elastically mounted masses is considered. Closed form expressions of the equations for the natural frequencies are obtained by means of the Green function method. The solution contains all possible combinations of classical end conditions
VIBRATIONS OF ELASTICALLY MOUNTED MASS SUPPORTED ON SYMMETRICALLY CROSSED BEAMS
β Scribed by WEN-JENG HSUEH
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 167 KB
- Volume
- 234
- Category
- Article
- ISSN
- 0022-460X
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β¦ Synopsis
This study presents a novel method to analyze the vibration of an elastically mounted concentrated mass supported on the joint of symmetrically crossed beams with #exible foundation. Analytical and exact solutions of the free and forced vibration responses of the system are also derived. Herein, the dynamics of the mounted mass and the crossed beams are expressed as two-way state-#ow (TWSF) graph models, in which the interactions between the components are considered. Based on the proposed model, the frequency responses of the displacement of the mounted mass and every beam are derived using a topological method. Moreover, the force transmissibility from the vibrating mass to the foundation and the frequency equation are obtained. The derived results are expressed in both analytical and closed forms. Also presented herein are some special cases including identical structure properties for each beam, simply supported boundary for each beam, mass directly mounted on the beams, and their combinations.
π SIMILAR VOLUMES
The present writer wishes to compliment the authors for their elegant solution to the problem of vibrating Bernoulli-Euler beams with an elastic support carrying elastically or rigidly attached masses [1]. The writer wishes to point out that free vibrations of Timoshenko beams carrying elastically
An exact solution of the title problem is presented. The overall situation is of great interest in many engineering applications. Three combinations of boundary conditions for the structural element are considered: simply supported, simply supported - clamped and clamped at both ends. An analysis of
Exact stiffness and consistent mass matrices for beams on elastic foundations are derived. Using these matrices it is possible to find the natural frequencies and mode shapes of vibrations, for beams fully or partially supported on elastic foundations. Several examples are given for frequencies and