Multi-dynamic absorber effect for quenching the self-excited vibrations of mechanical systems with distributed parameters

... , where p is the mass per unit length of the beam material, E is Y oung’s m o d u lu s, and I is the m om ent of inertia of the cross section of the beam The other notations have the same m eanings ... to the equilibrium of the sy s te m under consideration is stable if MULTI-DYNAMIC ABSORBER E F F E C T R ecalling the form ula ( l ) for the “negative” fr...

Ngày tải lên: 08/04/2015, 15:29

... n = *{* - B.)2 The intersection of Y\ and Ỉ and of Yi and y3 gives the root of equations (90) and (91) The greatest value of these roots determines the maximum of the amplitudes of corresponding ... now the -case when the damper mass m is small of order c The motion equations then become M x + cx = e[ — A(x — t>) + h ị X — /13Ì 3] , Ú = (11 ) V, mi) = \ ( x — v...

Ngày tải lên: 08/04/2015, 15:29

... vibrations of a system with single degree of freedom To avoid repeti­ tion, we shall refer below to the paper [1], where the problem of construction of a solu­ tion of the system of equations of the ... in the system with distributed para­ meters the vibrations with ‘ the lowest frequency (i'jj) play the main role Some experiments were performed...

Ngày tải lên: 08/04/2015, 15:30

... example, Maple and Mathematica REFERENCES [1] F Zheng and T Kaiser, “On the channel capacity of multiantenna systems with Nakagami fading,” EURASIP Journal on Applied Signal Processing, vol 2006, Article ... be useful with respect to channel capacity modeling of multiantenna systems with Nakagami fading The given expressions involve the digamma, expon...

Ngày tải lên: 22/06/2014, 19:20

... for the channel capacity of the Nakagami fading channels The conservativeness of the lower bound comes from the diagonal assumption on Q If, on the other hand, Q is nondiagonal, some kind of knowledge, ... distribution function (cdf) of the conditional Shannon capacity Notice that the last equality of the above equation follows from the fact that C(X;...

Ngày tải lên: 22/06/2014, 23:20

... 3] j - w( v I+0 IjiJ, ^ DYNAMIC ABSORBERS FOR SYSTEMS WITH DISTRIBUTED PARAMETERS 19 We shall find th e s o lu tio n of (4 4) with b' nndary co n d itio n s (4.2) in the form: sin - n x sin j ... lity relation s Jo = ( Mk " z when Y J ; k = J (2.3) DYNAMIC ABSORBERS FOR SYSTEMS WITH DISTRIBUTED PARAMETERS To find the e q u a tio n s for VVn (t), Yn(x)i Un we s...

Ngày tải lên: 08/04/2015, 15:28

... v) Dynamic absorber effect for self-excited systems R m 7777777777777777777777777777, Fig I h e r e t h e f u n c t i o n R { x , x) e xp re ss es t h e a c t i o n o f the self-excited force, ... note on the dynamic absorber, J Mechanics, Hanoi, 2, 1982 N g u y e n Van D a o , N g u y e n Van Dinh, Dynamic absorber for self-excited systems Proceedings of XIVth conferenc...

Ngày tải lên: 08/04/2015, 15:36

... factor in The Puritan theology of mourning  this shift was the increasing prominence at midcentury of jeremiad themes in sermons and other texts By the s, the gap between the ideal and the real ... to the absurdity of weeping for a Savior in heaven and for those who followed him there When they eulogized their dead, they felt that they were obeying Christ’s...

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Ngày tải lên: 20/12/2013, 18:15

... that measurement of acid phosphatase activity was the best estimation of the mRNA abundance in our systems, and from here on we use the ratio of acid phosphatase activities as an indicator of gene ... tested the consistency of the GLAM ratios by performing the assay in a wide set of previously characterized mutants involved in mRNA biogenesis The GL...

Ngày tải lên: 07/03/2014, 12:20

... useful as probes for exploring the active sites of AdoCbl-dependent enzymes In this paper, we have investigated the coenzymic properties of these homologues for diol dehydratase and ethanolamine ammonia-lyase ... totally inactive as coenzyme for ribonucleotide reductase, and the latter inactive for diol dehydratase [27] The X-ray structure of...

Ngày tải lên: 07/03/2014, 21:20

... coastal zone management in the world and in Vietnam are scientific bases for defining the coastal zone extent of Quang Binh, Quang Tri, Thua Thien Hue in general and the study area boundary of ... KC09.08/06-10 Scientific arguments on the coastal zone management and sustainable development model of Quang Binh, Quang Tri, Thua Thien...

Ngày tải lên: 22/03/2014, 12:20

... substance itself QSAR Comb Sci 22 (2003) A Generic QSAR for Assessing the Bioaccumulation Potential of Organic Chemicals in Aquatic Food Webs Table Parameters used to derive the BAF -QSAR The parameter ... transformation on the BAF The latter is illustrated in Figure It illustrates the QSAR Comb Sci 22 (2003) A Generic QSAR for Assessing...

Ngày tải lên: 22/03/2014, 14:20

... different for the two theories of mass terms The p-rules are for the semantic occurrence approach while the s-rules are for the syntactic expression approach The ontological underpinnings of these theories ... able to form the name of a kind from a predicate: (# water') is the name of the kind water and (# (cheap'(wine')) is the name of the kind c...

Ngày tải lên: 24/03/2014, 01:21

... Sections and Consistent with the IIW Recommendations for Fatigue Design of Welded Joints (Hobbacher, 2009), the present Recommendations not apply to low-cycle fatigue conditions However, there ... IIW RECOMMENDATIONS ON METHODS FOR IMPROVING THE FATIGUE STRENGTH OF WELDED JOINTS IIW- 2142-10 P J Haagensen and S J Maddox Oxford Cambridge Philadelp...

Ngày tải lên: 24/03/2014, 02:20