Results 271 to 280 of about 5,911,268 (324)

The Critical Excitation of Nonlinear Systems

Journal of Applied Mechanics, 1977
The critical excitation of a mechanical system, in the terminology of this paper, is one that drives the system to a larger response peak than any other in some class of allowed excitations. The critical excitation is of interest in questions related to the reliability and safety because the magnitude of the response peak is frequently an indicator of ...
R. Drenick
semanticscholar   +2 more sources

Critical excitation energy in fusion-evaporation reactions.

Physical Review C, 1990
The widths of the residue-mass distributions are used as a measure of the excitation energy of hot nuclei. They increase with the recoil velocity but saturate much below the calculated velocity {ital v}{sub CN} for complete fusion. Above these critical excitations energies (4.5--6.4 MeV/nucleon) derived from the recoil velocity, the normal evaporation ...
Bohne   +4 more
semanticscholar   +3 more sources

Optimal damper placement for critical excitation

Probabilistic Engineering Mechanics, 2000
Since earthquake ground motions are very uncertain even with the present knowledge, it is desirable to develop a robust structural design method taking into account these uncertainties. Critical excitation approaches are promising and a new probabilistic critical excitation method is proposed. Different from the conventional critical excitation methods,
I. Takewaki
semanticscholar   +2 more sources

Nonstationary Random Critical Excitation for Acceleration Response

Journal of Engineering Mechanics, 2001
The critical excitation method is promising as a robust method for accounting for inherent uncertainties in predicting forthcoming earthquake events and for constructing design earthquake ground motions in a reasonable way. Most of the proposed theories are based on deterministic approaches and deal with displacement responses.
I. Takewaki
semanticscholar   +2 more sources

Critical excitation function of distributed-parameter devices

IEEE Transactions on Electron Devices, 1966
A technique is described to estimate the transient response of thin-film devices at time intervals which exceed the greatest time constant or which are exceeded by the smallest time constant of the device. Relevant properties of distributed-parameter network functions are evaluated by applying the extreme value limit theorem to the corresponding ...
W. Happ, J. Staudhammer
semanticscholar   +2 more sources

Critical excitation of sdof elasto-plastic systems

Journal of Sound and Vibration, 2006
Abstract The critical excitation of a dynamical system is defined as the input excitation with the lowest energy that drives the system from one specified state to another within a given time span. Critical excitations play an important role in first passage problems because they are the most probable point in the first passage failure region of the ...
S. Au
semanticscholar   +2 more sources

An Improved Critical Current Calculation Method of HTS Field-Excitation Coil for Double-Stator HTS Generator With Stationary Seal

IEEE transactions on energy conversion, 2023
In this article, a calculation method for critical current of high-temperature superconducting (HTS) excitation coils made by Bi-2223 tapes is proposed, which can provide a reference for the design and manufacture of HTS excitation coils.
Yubin Wang   +4 more
semanticscholar   +1 more source

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