Download Bosch Automotive Handbook by Bentley Publishers PDF

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Can be absorbed by absorbers with natural frequencies proportional to the rotational speed (pendulum in the centrifugal force field). The absorption is effective at all rotational speeds. Absorption is also possible for oscillators with several degrees of freedom and interrelationships, as well as by the use of several absorption bodies. Modal analysis The dynamic behavior (oscillatory characteristics) of a mechanical structure can be predicted with the aid of a mathematical model. The model parameters of the modal model are determined by means of modal analysis.

Absorption is also possible for oscillators with several degrees of freedom and interrelationships, as well as by the use of several absorption bodies. Modal analysis The dynamic behavior (oscillatory characteristics) of a mechanical structure can be predicted with the aid of a mathematical model. The model parameters of the modal model are determined by means of modal analysis. A time-invariant and linearelastic structure is an essential precondition. The oscillations are only observed at a limited number of points in the possible oscillation directions (degrees of freedom) and at defined frequency intervals.

One measure to be taken: The bearing point should be set below resonance, so that the natural frequency lies below the lowest exciter frequency. Damping impedes isolation. Low values can result in excessively high vibrations during running-up when the resonant range is passed through. Passive vibration isolation Machines are to be mounted so that vibration and shaking reaching the base support are only transmitted to the machines to a minor degree. Measures to be taken: as for active isolation.

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