机械基础课后习题答案详解

1、,1 b:ggvuTRg1. 1 pQ1 .1 .1 YefBl( 1) cRoRvivQR|0( 2) c6R:ggRVve0( 3) cb:ggvulQ_0( 4) cwvi :ggvwpe0( 5) cNtv蚛sb:ggTwvMOn0( 6) 嬷S0NOoR:ggLRg01 .1 .2 gRoRvQR|1. gg:ghV-NzvRUSCQSO, /fb:ggv KNN0涎/f:ghV-NR坶R vUSCQSO, N*Ng厯fN*N涎, _NN/f1u傲*N涎RTc(WNwvN*NzRvteSO0gVb_hN/f(uvgUSvagbOVb_egh:yv, FORfvw, g:NYvsbRS

2、O0:gg-NvgR:NN|:( 1) g :gg)0(ueg/eb;mRgRg vg O:Nxvz:ggR儶PWh( 2) SR ;NR0麎eQg /fR_v;mRg sSO(ugqRRvg( 3) RvQYO;NRRRv;mRg( 4) N0gRvRvQRw ORvO(u02. RoRRoR/f1u$Ngbv雯SRvTc萆R, /fb:ggvN 01uRoRvINNwRoRvr_YN:( 1) wQgNvc扨b, vb$NgNc扄vhb麎RoRCQ 0( 2) Nv雐R0k, RoRcNQR|:( 1) 9hnc$Ngc扅QR:NoRTNOoR, vQ-Npbc扄vRoR麎oR, 厢c扄v

3、RoR麎NOoR0( 2) cgbRoR$Ng倢雐Rvb_R:NlRoR(鍀:N侔) 0蒯R0oRTtboRI0( 3) NRoRwwP6R$Ng吧N雐RvO(u, b厐RoR9hncvQb_eQ_gvpeR:N! oR0a! oR0b! oR0c! oRTd! oR0(WE:gh-N, 8gNgvQgYYc扄vTcQ, 唞謏aRgTYc所b_eQv_gQ, v9hncb_eQz_gvpeg$R$NgbRoRv|+Rpe0;KN, $NgbvRoR_eQN*N_g, _NwQgN*Nu0k, sbRoRvgY_gpe:N2 , g_gpe:N10RoRvVb_hRcgqv&6R01 .1 .3

4、 :ggRVvQ6R:ggT萆Rv雐RQNTgbvRoR|W( lRoR0RoRoRI) TTgR:耳SnxTRoR雍Onv:造, Ngb_rTYb_:黠V Q0b厬 gRStvVb_, N9hnc:ggvR:cNvO:RoRvMOn, Q(uvRoRv&gUSagbOVb_:ggvRQh:y姬 NE:ggMOnb:kOUSVb_麎:ggRV0Nw:ggRV/fTRdNNRQv;u姄vV, gnZi0WyN:ggvRyr0:gg, _N1/fnx:ggeHhTNRgsQv:sS:ggRV0:ggRV6RvekYN:,Nek: n:gg0eQgN0,Nek: RngHQO;NRRweg, 6qT

5、;NR, c2 :ghYe gRUSCQSOvin:gg-NgNg vgSgg) cTcz1 , 2 , 3 , 0,Nek: nRoR|Wv9hnc$Ngv雐Rb_bRoRCQ vb_r, nRoRv|WvO!k YA, B , C, 0,ek: pS_0W颜OVvbq_sb0颶e厽gUS0nZi0Wb:ggvRQh:y姺NSR0N,:gg-NvYpegRsb:Nbq_b0,Nek: 厺gg:NPWh;NRNN*NS_vMOn, cOTRoRvMOn, v;uRoRv&謺Q厺gg:NPWh1/fQgNRoRvMOn, v厤kMOnO:N摬 ;ug-NTgggvMOnsQb厺gg,g/f&T4

6、lsbPe/fNQv0;NRNS_MOnvv/fO;uggRVnpf, 1/fgag=NN0N0,mQek: TNgRoR(uUSvagwegg v謺QgSRlT4Y, O掺ggvRV01 .1 .4 sb:gguv1. sbN,:gguvvQlQ_:NF = 3 n - 2 pl - ph (1 .1)_( 1 .1) -N, F :N:ggvu, n:N:gg-N;mRgpe pl :N:gg-NNOoRvpe ph :N:gg-NoRvpe0:NNOF cknx, cknx$Re:gg-Nn, pl Tph vpe k, yr+R謏aYtYNRNQ:( 1) cknx$R:gg-Ngpe

7、TRoRvpe0g:gg-NvRUSCQSO, b厬 NggYUOYBg, /fTN*NRUSCQSO, 1/fN*NgRoRpevnx, 謏aYT侔vX(W, sSS_m( m 2) *Ng(WNY厬RoRTc嬀 RgbYT侔, vQlRoRpe:N( m - 1 ) *N0( 2) dS萪1u0萪1u/f(WgN:gg-NNgNuvNq_:ggvQgRv萐Rvu0(W:ggvu嬀 :gg-Nv萪1udSN( OY:Ngg-NRPNR,1 b:ggvuTRg3 0( 3) dSZ_g0Z_g/f:gg-NNgvRENNw_gO(uv_g0(WYYpeQN, Z_g(ueg9eU:ggvRrQ

8、, FOZ_gvX(W;/fO:gguvTINpeNO, k, (W:ggvu嬀 _eQZ_gvRoRTgSN, 厾0Rcknx:gguvv0Z_g8WNR:WT:( 1) S_$NgYc扌gb蒯R, NTc扄Y$NgRveT|_dksL, b$NgYMTgblRoR, NlRtT嬀 R:NN*NNOoR( vQYONOoRYv_gN:N/fZ_g) 0( 2) S_$NgYc扌gbsboR嬀 傄Tc批pYvlQT,:NN*NoR; 傄Tc批pYvlQNT, 儔c批pYOv_gQ/fTN_g0OY傤Ng$NYc扌b_bsboR, $N*Nc批pYlQeTvN|_dkT, /fbsL, R:N$

9、N*NsboRbNN*NsbNOoR0( 3) :gg-N ORNwzO(uvR0;KN, (W:ggvu嬀 HQcknxRgvfnxcg-NX(WvYT侔0萪1uTZ_g, v萪1uTZ_gdSN, Q)R(u_(1 .1) eg:ggvu0gT(_0Rvu/f&TN:gg-NSRpevI02. 蒯Rsb:gguvNg蒯Rbvsb:gg, 1uNN*NgX(WlRvR, g蒐R, b厏kN*NlgMwegvgu:N2 , k, 蒯Rsb:gguvN叟( 1 .1 ) , uNbvlQ_hQ蒯Rsb:ggvu, sSF = 2 n - pl (1 .2)_( 1 .2) -N, n :N:gg

10、-N;mRgpe pl :N:gg-N蒯Rvpe01 .1 .5 wvQ(u1. ww/fO雳bRv$Ngw帶:N樀 sSI) vTp, sSTp0(W:gg-N, Yg$N*Ng/fRv, sSvQTpY4 :ghYe vNIN欀 RvQw麎雬w0Yg$N*NgN/fYbkv,sSvQTpYv:N欀 RvQw麎_02. w;pe$N*NgN*Nw, k1uN *Ng+T:gg) bv:gg, vQwpecTsQ_K = N( N - 1)/ 2 (1 .3)3. wMOnvnx:gg-N楣厐RoRTcv$Ng vQwMOnvnxeYN:( 1) 傤NgblRoR, RlRoR-NsS/fvw

11、0( 2) 傤Ngb蒯R, RvQwMON蒹eTvWvzY0( 3) 傤NgbRvoR嬀 RvQoRc批p1/fvw0( 4) 傤NgbR|QRvoR嬀 vQwMONc批pvlQN0NN楣b_bNOoRbRoRv$Ng, vQMOnN楣姬 R|QRvoRTNN楣b_bRoRv$Ng, R)R(uNtegnxvQwQSOMOn0Nt: OsbRvN*Ng屑gN*Nw, ONTN捀N04. w(WRgNv(u(uwO:ggvRg, vQfnxvQ-N$N*Ng( b) , bNg( b) , Bl擀Ng( b) vQNpv0(uwQNvsQ.(WNnx$N*Ng:ggKN儶N*Nw0(W(uwO:

12、ggvRg嬀 cgYvi 龋县agh:yv$Ng TvTpibY, sTKNTegBl0wN_0W1u;NRsSBlTR叹pvTv, NN:gg+RvP6R; FOw(uegBlN區egBlR, NS_:ggYBg嬀 NvwMOnKNY0,1 b:ggvuTRg51. 2 p巆gVsb:ggvuTRgbgg :gg)SR ;NRRRoRNOoRloR蒯RoR:ggRVINRoR0g8(u:gghe:ggRV6R:ggwQgnxRvag uINSR:gguvsb:gguv: F = 3n - 2 pl - phu謏avNycknxRoRvpe( YT侔I)萪1u:PvQ-NvlRZ_gX(Wvy

13、Qsb:ggvRg: ww_雬w:ggw;peK = N( N - 1 )/ 2wMOnvnx$Ngc厐RoRTc$Ng楣Tc:Nt:ggvRgBl$NgKNBlgT1 .3 p8IW|1 .3 .1 ,gp,gpg压NNeb:( 1) :gg-NvgRoR0YT侔0萪1uTZ_gIi6 :ghYe ( 2) (uv& 6R8(u:ggv:ggRV0( 3) sb:gguvcknx0( 4) wviNtvcknx(u0( 5) (uwO:ggvRg01 .3 .2 8IW|O1 .1 6RV1 .1 ( a ) b:yOPllgvRV(vQT萆R:uV-N楣) , v$Re勺gg/f&TwQg

14、nxvR0V-NOPn1 tA lR, Ys2 Nva (WtClRvW糀 -NR0S_OPn1 cV:yeTVl嬀 NOSl1u8TeQ, Sl杯zcV1 .1 1) TvO:(l ) 6Rdk:ggvRV, YV1 .1( b)b:y0( 2) :ggvu0dk:gg:N愧GdWW:gg01uV1 .1 ( b) wn = 3 , pl = 4 , ph = 0 , 1u_(1 .1)勺ggvu:NF = 3 n - 2 pl - ph = 3 3 - 2 4 - 0 = 11uN勺gggN*NSR b厤k:ggwQgnxvR00謑06R:ggRV嬀 sQ./fRgN*Ng_gsQnxRo

15、Rv|W, 6qTQ(uv&:y姂0O1 .2 V1 .2 b:y FgT:ggvu0WV1 .2 -N, B, E $NYvPlR:N萪1u, C, F Tg$NYN,1 b:ggvuTRg7:ggc扄gb蒯R, FO:NN*N蒯R, 勺gg(WD YX(WhTv, FO1uND YcvWW:NN*Nu:N愶a! Fg, sSDY*g_eQ_g, Ee:gg-NNX(WZ_g0V1 .2:gg-Nv萪1udSN, Rgn = 5 , pl = 6 , ph = 2 , N/f_勍:ggvu:NF = 3 n - 2 pl - ph = 3 5 - 2 6 - 2 = 10謑0Yg勺gg-ND

16、YcvWW9e:NvASWWW嬀R:gg-N1X(WN*NZ_g0(W:gg-N, $NgbRoRb_eQv_gwwP6R$Ng吧N雐R0O雐RbuvO(u0FO(W:gg-N,NRoRTgeQv_gN:ggbvvQ_gY, gvRENNw_gO(u, _g1/fZ_g0O1 .3 V1 .3 b:yv|S:ggvu0V1 .3uV1 .3 Nw勺gg-NX(WgR, ORvz8 :ghYe egw, g:ggABCDE 1NN, vQYO萆R:NNq_:ggR OvY萆R, Ee_eQNZ_g0:gg-N_eQZ_gvY萆RScN, Rn = 5 , pl = 7 ( CY:NYT) , p

17、h = 0 , N/f_勺ggvu:NF = 3 n - 2 pl - ph = 3 5 - 2 7 - 0 = 10謑0X(WZ_gv:gg, N,8wQgbRvgyr_0b厬 Yxvzv:gg(WgNwQgbR, 1gX(WZ_g, 1謏aRg, 厍Qu0O1 .4 V1 .4 b:y:ggvu0V1 .4V 1 .4 b:yvTiWW:gghQ1u蒯Rb, dk:gg-Nn = 3 , pl = 5 , N/f1u_( 1 .2) _勺ggvu:NF = 2 n - pl = 2 3 - 5 = 10謑0謏a, 傺gg-N(W蒯R, (WTg华vlR, 座guvN叟(1 .1) , (u

18、_(1 .2) eg, &TRO0O1 .5 V 1 .5 b:yvgg-N, R = 50 mm, lOA = 20 mm, lAC =80 mm, OAC = 90, 厉1 = 10 rad/ s 刔lR, O:l = 0 .002 m/ mm0(uwBlR v2 0uNtBlvwP12 , P13 TP23 , RpP12 Yv:Nv = 1 ( P13 P12 )l = 2 ( P23 P12 )lR2 = 1 ( P13 P12 )P23 P12=10 1252= 2 .31 r ad/ s (刔)0謑0)R(uwNsb:gg, yr+R/fsboR:gg, L,1 b:ggvuTR

19、g9Rg/fOv0Bl$NgKN, N,HQR+RBlg:ggvw( _) T$N*Ngw(雬w) , 6qTcNpbN濾,HN$NgKNINvQw雟wR_v$Nkv0Yg$Ng雬wQR勞, R$NgT KNRlT0V1 .5O1 .6 Nr4Y(R:ggv:ggRVYV1 .6 b:y, (WV:yw儧 v:N1 , :ggT萆R:V0( 1) dk:ggvu;( 2) BlV:yMOngvvC 0 1) :ggvu0(W勺gg-N, n = 5 , pl = 7( F TF2 Yv蒯RN*N) , ph = 0 , k勺ggvu:NF = 3 n - ( 2 pl + ph ) = 3 5

20、 - 2 7 = 1( 2) Rg0HQBlN3 v_P36 vMOn, QBl_P13 vMOn0NP13 :Ng T3 vITp, b厍vP13 = 1 AP13l = 3 P36 P13l3 = 1 AP13/ P36 P13 ( rad/ s)3 N1 lT NP13 YRP36 P16 , RgvC = 3 P36 Cl (m/ s ) ( 4lsT杩bBl_P15 vMOn, 楣)R(uwP15 Bl_vC = 1 P15 Al ( m/ s) (4lsT杩0謑0(uwLsb:ggvRg, 1/f)R(uw/f$Ng10 :ghYevITpNehh, $N*Ng(WwY楣T獥g0V

21、1 .61 .4 TN拣1 1 4 y:ggv:ggRV0V1 .7 1 1 VV1 .8 1 2 V,1 b:ggvuTRg11V1 .9 1 3 VV1 .10 1 4 VT:ggRVYN:V1 .11 1 1 VV1 .12 1 2 VV1 .13 1 3 VV1 .14 1 4 V1 5 12 cR:ggRV-NvYT侔0萪1uTZ12 :ghYe_g, vT:ggvu0V1 .15 1 5 VV1 .16 1 6 VV1 .17 1 7 VV1 .18 1 8 VV1 .19 1 9 VV1 .20 1 10 V,1 b:ggvuTRg13V1 .21 1 11 VV1 .22 1

22、12 V1 5 F = 3n - 2 pl - ph = 3 6 - 2 8 - 1 = 11 6 F = 3n - 2 pl - ph = 3 8 - 2 11 - 1 = 11 7 F = 3n - 2 pl - ph = 3 8 - 2 11 - 0 = 21 8 F = 3n - 2 pl - ph = 3 6 - 2 8 - 1 = 11 9 F = 3n - 2 pl - ph = 3 4 - 2 4 - 2 = 21 10 F = 3 n - 2 pl - ph = 3 9 - 2 12 - 2 = 11 11 F = 3 n - 2 pl - ph = 3 4 - 2 4 -

23、2 = 21 12 F = 3 n - 2 pl - ph = 3 8 - 2 11 - 1 = 11 13 Bl .23 b:y级gvhQ萬wTg , 3 v1/ 3 0V1 .23 1 13 V级gvhQ萬wYV1 .23 b:y, g , 3 v:N14 :ghYe13=P34 P13P14 P131 14 Bl .24 b:yckR:ggvhQ萬w01 = 10 rad/ s , Blgvv3 0V1 .24 1 14 VckR:ggvhQ萬wYV1 .24 b:y, g v:Nv3 = vP13 = 1 lP14P13 = 0 .21 = 2 m/ s (eTW摔N)1 15 YV1

24、 .25 b:y:Nid椌f OR:gg, Lfn2 Ng , 4 cRc扬 (uwBln1 Nn2 vKN1/ 2 0V1 .25 1 15 V,1 b:ggvuTRg15Bln1 Nn2 vKN, HQnxn10n2 T:gg4 N*NgvN*Nw, sSP12 , P14 TP24 , YV1 .25 b:y0R12= -P24 P12P14 P12= -2 r2r1n2 Nn1 vlT01 16 K:( 1) V1 .26( a) b:yvgT/fN雐RvRAhg;( 2) gT傡nV1 .26( b) b:y:|: AB = CD = EF , BC =AD , BE = AF ,

25、Rg寓厧Nu雐R0V1 .26 1 16 V 1) V1 .26( a ) -NvgTvu:NF = 3 n - 2 pl - ph = 3 4 - 2 6 - 0 = 0u:N欀 :NNRAhg, b厄g华雐R0( 2) V1 .26( b) -NvCD Fg/fZ_g, ScN&TNq_:ggvR0EeV1 .26( b) -N:ggvu:NF = 3 n - 2 pl - ph = 3 3 - 2 4 - 0 = 1b厄g彀Nu雐R01 .5 fNHegKmTHh1 .5 .1 fNHegKm1 1 kXzz( 1) sb:gg-NRoR_eQv_gvpegY:N*N, iRNv16 :

26、ghYeug:N*N0( 2) $N*NOsbsLRvg庎c扄vRoR麎NOoR, g*N_g; :Nc扄vRoR麎oR, g*N_g0( 3) w/f, 雬wN_vp/f,NTp/f0( 4) S_$NgblRoR嬀 vQw(WY; b蒯R嬀 vQw(WY;bRvoR嬀 vQw(WY0( 5) 傀N:ggqQ1umQ*Ngb, qQg*Nw01 2 V1 .27 b:yYFg:ggvu0V1 .27 Km 1 2 V1 3 (WV1 .28 b:y:gg-N, ABEFCD , vQu0V1 .28 Km 1 3 V,1 b:ggvuTRg171 4 V1 .29 b:y Fg蕺ggvu0V

27、1 .29 Km 1 4 V1 5 V 1 .30 :NNFgT:gg, lRv:N1 0勺ggvhQ萬w, vnx(WV:yMOn儧 v0V1 .30 Km 1 5 V1 .5 .2 THh1 1 ( 1) 2 , 1( 2) b, 2 , p, 1( 3) $NgITp, ITp, /f&TIN捀( 4) lRoR-N, 蒯Rvz, 璹p( 5) 1518 :ghYe1 2 F = 3 n - 2 pl - ph = 3 9 - 2 13 - 0 = 11 3 F = 3 n - 2 pl - ph = 3 6 - 2 7 - 2 = 21 4 F = 3 n - 2 pl - ph = 3 6 - 2 8 - 1 = 11 5 YV1 .31 b:y04 = 1 P14 P15 / P14 P45V1 .31 Km 1 5 V,