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MBTシュ?ズ ??店 lex swv rmow kzz

发表日期:2011-07-11 摄影器材: 点击数: 投票数:
 Ball screw CNC vertical vibration of the inherent 
 Manufacturing Technology and Machine Tools National University Research Association, is mainly engaged in CAD / CAM, CNC machining theory and technology and other areas of teaching and research work, published nearly 30 papers. Received date :2004-4-12 8 Secretary to the elastic vibration theory in Figure 1 do not get a straight rod flexibility inherent in longitudinal vibration equation: EA Lu: pA + Σ | j} u (xl,Beats By Dre Studio, t) 6 () (2) set out dt11 (2) the solution is: u (,Beats By Dre Headphones, t) = u () sin (+) (3) to (3) generations (2) to be: boxing u: a) (4) where: Ap ∞ / E of type (4) to obtain ::++? life Laplace transform in (5) the inverse Laplace transform obtained: u (): u (.) + si + (...) (6 ) where: c-= {: (6) is shown in Figure 1 Straight inherent longitudinal vibration when the vibration function. 1) When a straight rod fixed at both ends, its boundary conditions u (0) = U (L) = 0,Salvatore Ferragamo outlet, Straight natural longitudinal vibration mode shape for the: u ()=[) sin) a] (7) as = u (): u (), using (7) can be characterized by their frequency equation: All a 1A2l ●: All222-1 ●: A: 0 (i, j: 1,2, ... n) (8) type in: ki [n) a] 2) When the straight bar with one end fixed, one end of the freedom, the boundary conditions: u (0) = du (L) / dx = 0 Straight natural longitudinal vibration mode shape as: u (): [muscle) sinA (a) a] (9) Therefore, the straight rod natural longitudinal vibration frequency of the characteristic equation: Bl1-1B2l ●: Day lBl2B22-1 ●: on this point, Straight natural longitudinal vibration frequency of the characteristic equation for the Cl1-1Cl2 ... Ch support, its boundary conditions: EA ? du (0) / dx-ku (O): du (L) / dx = 0 Straight natural longitudinal vibration mode shape is: u () = u () 1 (...) sin ~ (X - Xi) a + a +!!:!! Mexico II +:!! two] r1 '. AEsinA thirty-one kcosAL.) tEA (AEsinA thirty-one kcosAL), J At this point, the inherent vertical straight bar The characteristic equation for the vibration frequency: lDl1Dl2 ... I1D'D: nI: O (i, j: 1,2,MBTシュ?ズ ??店, ...) D, 2:-I type in: = k1In (x; a) sinA (a) _ + cosAx. ? cosA (L-) ksinAx ? cosA (L-), + _ face cases, using (7) can be written directly for the bar mode shapes: ux): [sm (a] (14) using (8) we can write the frequency characteristic equation is: China +: 0 (15) / ~ 1SlnA '(15), the results associated with the use of sub-legislative solution is consistent with the results,herve leger sale, indicating that the proposed method is simple and feasible, and the result is the exact analytical solution. References 1 Wu Chi-bing, Wu Jianmin, Shao Bing. Ball Vice-bearing screw 72 means the mechanical model. right process = 0 (, = 1,2, ... n) (10) the accuracy of the [J]. machine tools and hydraulic ,2004,12:93-95 formula: [( n a) a 3) When the straight rod ends are free, its boundary condition is du (0) / dx: du (L) / dx: 0 Straight natural longitudinal vibration mode shape as: u () = 2 Huchang Bin, Wangkui Hua, XIE Kang Considering the role of elasticity of pile-soil-coupled vertical vibration analysis of bearing piles and application [J]. Engineering Mechanics, 2003,20 (2) :146-154] 3WangT, WangKH, XieKH.Ananalyticalsolutiontolongitudinalvi-bratlonofapileofarbitrarysegmentswithvariablemodulus [J ]. ActaMechanicalSolidSinica, 2001,14 (1) :67-734 Chen Guohua, summer, Shi-to. with a focus on quality and flexibility inherent in supporting a horizontal ladder shaft vibration analysis [J]. Southwest University of Science and Technology, 2002,17 (3) :40-42 ....) si a 。)+]( 11) as a ¨ ¨ ¨ 
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