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Practice4 - 1 $0 Wax 21.03““4 —-9 x= acooaoo\Y 25 =...

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Unformatted text preview: 1 $0 Wax: 21.03““4. —-9 x= acooaoo \Y\ 25. = \ + £33011 I. ‘- - ‘ I' ‘1 L w? 7; QACL X —. qgl *' S; ' ,= .. _ = C dis a; . ——» kahuna-5;; : = i t o - CM . _ . 4 I I 45 ._ C x l+ ‘ w .. “8-K; ‘ £217....” I r S I w i r ‘ 7—“ m .. I I" if a. --> A = W I S ‘ 1' d: 4 P“ F: ‘ : 0'0 -7 1 CM {000“ . _ Fo _S_Q.___Efi\_h___:r_ _______ _ o—fi‘i—QSNLMWNMO—thmu—QFPCQX‘ T h \— F—" at——~— —~—_—+~ —————~—————-—~— .fl‘g}; 0 #3445363;— 'T“; Sw__fi_ O _____.__.._..___ “ii—”rt“ AWJJLSfV—‘gimwmm _ $5633 :4: 5M any {+9024 Q-Ef “P IN RSFQ‘HA $4 § _ Q —-—'—m . . _: Jwel )X 1 T“; ,“V C 6'; S wvx lit- . WK- M‘, . H 4“ ~,- ., Mmcawv; _ L ‘ _ - O a )1: :5?) _ ({_q_&rmfli+fiég;gé_q§r_ 1M— ‘ 1 “ \. fM——————) 9—.» FFL— “—3— ‘K 1%. wfi’cmtm‘ in \\ DIME-V98) OHM 2 lfl“. f iqgé}, V‘isf'a’i'ion ’CVF (Engineers? [2] Example 5.3 Dynamics of a Punch Press i The period excitation shown in Figure E5 .3 is applied to the base of a punch press. Deter. mine the resulting motion. F(t) Figure E5 .3 E3? Solution The function F (t) can‘be represented by the Fourier series if m n E Fm = 929 + 2 (it" cos mot + :5" sin mo!) lli n = l 5,} For this excitation, Fm = (Po/Ty. Then *3 T T g au=3f F(t)dt=-—2£2‘1f id: =5}, e T T a o 0 i r T a on = 2-! F(r)cosnwrdt =E§f tcosnwtdt = O a T o T- o ; 7‘ 7" g2: b,l = 2 F(t) sin mold! = 2-59]. tsin mold: = ~59- E? g T o T‘ 0 W :{j Thus, the series expansion of F0) is 3 . an "1'; 1“ F0) = (l — l -1- sin 11011)}70 i}: 2 n = l ._‘.':"I lg Now the differential equation of motion becomes ii °° if m" + ‘fc+kx=(l~—1— lsinnwt)!’ ' 53. x L 2 1r " = 1 n o g The solution is {ll _. fl _ fi 06 ‘1 Sill (110.): "' (bu) .3] ii (This example presents the dynamic analysis of impact-loaded machine mounts, such -: 5.] as a punch press.) El £1 ‘3 l L H.LO fib fiat-tea {5 {01:16:11,} ’W (’9 ASSW’Ma’ 56% 611(4qu Cord {401$ “)9, I016”) 6&2, rasponsrea to £66) @éhdf mince) I LS . t 1- M): j @111er (COILUO mtg/L) 1.5; m AM» 101,151.“) a s 116. ”‘11an XCrfld/Q anti 3.16 6 , 56(1)“? SEW A16 5mm. 5-5/6“ng 42qu «64,55 Mg): 0: 1“: +0 +0 Sabin £23K {fem z 0'5 ...
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