工程力学试题

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3ÝஹÞ⚪⚪10ᑖ1.᝞ᡠ&rfᔲᨵ┯á}᝞ᨵâãäåæḄ&஺2.r/cḄçèᜧê:ᔣÙãä8cªCcḄèḄ:ᔣ஺ë;&ìíì1AᔁwᫀOஹᓫ⌱⚪⚪2ᑖ1.A2.B3.A4.C5.Cðஹᑨò⚪⚪1ᑖ1.åæ2┯á3.┯á

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51.yABDᩚẆ{|H};2.⌱ᙶ᪗RxஹyA3.zT⊝&tr4z=°/ἕ—ὡcos45o=0ᐭ=3.39kNF=0%+4sin45஺—G=0r:5ஹ.=2.4kNZiynp=04sin45°x/8—Gx/Z=0a=—L2kNnJ2.r⚪stuvwᓄḄᨬFᔠᏔwM-M+M=-F]-a-F-b--5kNx30mm-3kNx60mm=-330kNmm=F0.33kNmn┐&Fᔣp1223.r⚪stuv:rwn1}᝞}ᡠ
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8⊝஺2.$ᡂ⊝Ḅ'()*+,-.஺/0Ḅ1ᦪ345஺3.78ᩚ9:ឋḄ<=>▭@AB᝞DEᜧGHḄ<=஺4.JKB᪗M஺5.0OP☢᫡ḄSTUᑁᵞXP☢@ᔜ.ḄZ[)ᙳ]+5஺6.᫡XP☢@ḄZ)ᙠᦪ_@]+ᵨᙠ`P☢a-cdcᡈfc᫡@ᡠᨵ᜜)Ḅ1ᦪ3஺7.klm஺nopHqᙠrᙢ☢@StJCZ@ḄpHᑖwk4kxḄyz஺8.ᨵ-|}᫡~ᙳw₹ᵨᦋ4`ᙳw₹ᔠ)]Ḅl)ᵨᐸᵨ.+ᙳw₹Ḅᔠ)ᵨ.ᜐ஺᫡ᙠ'ᡠḄOᓽᢰH3oB-᪵Ḅ஺9..ḄJ4s=br+cবc4ᦪᑣ.ḄJ¢£-:4-ᩩT஺10.§]ᙊ©ªO«XP☢@¬ᨵ[)®¯ᨵᑗ[)±ᙠᡠnªOZᑗOB,Ḅ஺²ஹ³´⚪⚪2ᑖ1.ᵨ+:©Jµ¶@)0Ḅ·]+¸¹஺2.º@ᵨḄ»ῳ᫡ஹ▤¾©],ᐸP☢ÀÁÂ0ᜧîP☢ᓄḄ᫡ÅÅABÆÇḄ᫡஺3.ÈÉÊËÌÍᙠÎÏ«Ð⊤ÒÓÔḄO᝞ÕÈÉ5ÍᨵÖOA×ᯠÐÙÚÛᘤº஺4.ᙊ©ªOḄÝ)ᱯ.BḄ᜜)Ꮤ0ᵨàOᱯ.B஺5.4nâ=300km/hḄpHᔣᓭéê8nᓃ=30km/hḄpHᔣìᓭéêíIïB*+AḄpH,஺òஹ|ó⚪⚪5ᑖ1.0Ḅô*ᢰTḄOᨵõöÙÚ÷2.kxµ¶ᙠ/ஹBஹC².ᔜÝ-)ᵨøùᜧ=ú="=/ஹAABCOü`)ý|ᓄḄᨬÿ
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9ஹᑖ᪆⚪⚪10ᑖ1.ᱥᏔὡஹ£,∡#ᵨ,%&ᱏ=5kN(E=3kN,a=30,6=60ᓫ*mm,+,ᐸ.ᓄḄᨬ2
322.+,ᩚ1-1,2-2,3-35☢Ḅ7(8#7஺23<__-130kN1233.᝞ᡠ.᧕=>?᫡,ᵨABCᑴᡂ஺FG₹F=20kN,8IJ᫡7KL
0<7+⌱NABCOP஺%&᫡ḄQR/=6U(VᵨW[b]=100MPaVᵨᑗW[r]=60MPa4.YZ[ᩚ(\]ᳫ_`a(bឋdeE=200GPa,+ᵨfghiᐸjkG₹஺1ᙊ_5☢(d=25mm/=1.0mm2)n_5☢(h=2b=40mm,7=1.0mm3)N016ABC,7=2.0m.

102.%&o/pḄUqRᜧstuᔣ(+wx8pyCpḄqRḄuᔣ஺Az{|{}2Aᔁᫀஹᓫ⌱⚪⚪2ᑖ1.A2.C3.D4.A

115.Dஹᑨ⚪⚪1ᑖ1.2.3.┯4.5.6.7.┯8.┯9.┯10.┯ஹ⚪⚪2ᑖ1.nᜧsḄ2.R3.ᛛឋ4.ᜧsஹᔣஹ#ᵨ☢7ᚖ5☢7L5.30km/hᓅuᔣஹ.⚪⚪5ᑖ1.n¡ᢰR(£n¡£ᢰR¤¥¦§┯Ḅ஺¨᫡©n}(ᢰª]«ª(¬]m(¨᫡©£n}(ᢰª]®ª(dx~d2w]£஺dx12.¯°}┐ḄᏔm²⊝஺ஹᑖ᪆⚪⚪10ᑖ1.³⚪´zµ¶·.ᓄḄᨬ2
]ᔠᏔ·M-M+M--ὡ.a-6•6=-5kNx30mm-3kNx60mm=-330kNmm=-0.33kNm°}┐uᔣi22.³⚪´zµ¶:

1223³·1ஹᔜ¿7%=-30kNF=-10kNF=30kNV2V32ஹw7³·1ஹᔜ¿7%=/Æ=0FN3=F2ஹw73.³⚪´zµ¶:³1.ᑁᑖ᪆Èᑖ᪆(¨G₹*É᫡QRop}(nᨬᜧ(ᐸÊ]^max=~~বѨG₹☠ÓaÔ}(Õᨬᜧ(ᐸÊᑣ]4,Ø82.ᢥªWRᩩÜ⌱N5☢ᵫia8᪷ßWRᩩÜ(⌕,3á\â=3Ox]0(ᵫOCåæ⊤èé(N922aABC5☢Ḅᢙ5☢ìᦪî=3.09x10Tm3,ᡠð,⌱NNo22aABC#᫡òᔠªWRᩩÜ஺3.᪥᪶᫡ḄÕᑗRNo22aABC5☢Ḅ/,/£=0189m,ῳ÷øR]3=7.5mm஺ᵫibé,1Mx᫡ḄᨬᜧªᑗW]

13F_20X1Q3Nümax=1.411xl07Pa=14.11MPa<[r]11(0.189m)(0.0075m)----oIþ(⌱NNQ22aABC#᫡(ÿ
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148k/lmn
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CᦪDᨵᢗ3.1Ḅ᩽▲AcrBbp;CcrDqeA4.ᨵrFḄᢗ£.2-xWḄCM9S=02ᑨVS9஺AᙠxWḄ"☢[ᚖ.xWBᙠxWḄ"☢[¡ᚖ.xWCᙠxWḄ"☢[¡ᚖ.xWDᙠxWḄ"☢[ᚖ.xW5.¢£¤£᫡¦᝞8ᡠU2᫡Ḅ9

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Ḅ¾¿À>Á.ÂḄᔲÄ஺93.᥅ÆḄyᔣÇᱥZÉÊf-ËJᡈf-ËJÍÎḄyᔣfP஺94.ᱥZḄÏÐÑÂÒÓÔᙢᳫḄ×ØÙÚᜫÛÔÜÝ஺95.Þßà]áḄJÀ
2âὃ⇋ᔜà]ḄåJyᔣ஺96."JYZ[ær]ḄçèᨵÀÊé2"☢åJYZ[æ•]ḄçèᑣrV"☢é஺9MM7.ëXᑗÞßìír=rPïð.µ〉ᵨ.ᙊW஺9pp8.W8óUHᩚᔜ©ôõ☢[WḄᜧh2öÀP᧜ᩚᔜ©¬¯øù³ú஺99.ûᙊWëX¬
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162.}~☢Qὡ=50kNK=60kN,£=50kNE=80kN,ᔜ\ᔣ᝞pᡠP,ᔜᵨtḄᙶ᪗4(20,30)ஹJ(30,10)ஹ4(40,40)ஹ4(°°)ᙶ᪗ᓫmm2ᔣ4t3ᓄḄ¡A3.pP\¢,ᵨḼ¤ᑖஹ¥2஺}~ὡ=100N,g=10j^N,/)=0.3m,c=0.4m,<7=0.2m,e=0.1mrᑖ®gh¥iBᙠ1¤ᙶ᪗,Ḅᢗ²³´1¤ᙶ᪗µ¶஺4.᝞paᡠP¸ᔠ᫡ᵫ᫡AC?᫡CDZᵨ¾¿CÀÁÂᡂ஺ᙠ¾¿C?᫡AC,ᑖ®ᵨᨵÄ>E?¶M=FaḄÄ>Ꮤ஺rÅ᫡Ḅ/?v¶p஺e

17ÆஹpÇ⚪6⚪5ᑖ1.☢È᪀᝞pᡠPrÅÊᔜÀᩚN8ḄË'Ì<>Í஺য2.ÅÊ᝞pᡠP᪀ÏABCDḄp஺3.᝞pᡠPwÐÑᙽÈ᪀ÅÊp>ᔜ᪀ÏḄpÓÅÔḄᱥ¢ᙳÖgÔ×ᡠᨵÁØᜐᙳᐝÑÁØ஺4.᝞pᡠPrÅÊᔆÛÜÝḄp஺

18Þßàáà'3Aᔁ4ᫀஹᓫ⌱⚪6⚪2ᑖ1.C2.C3.D4.D5.Båஹᑨç⚪6⚪1ᑖ1.┯é2.┯é3.xê4.xê5.xê6.xê7.xê8.┯é9.┯é10.┯é1ஹ34⚪6⚪5ᑖ1.;<ë2%Ḅìᩚíᜧ;<ᩚy44/1<%Ḅìᩚí>;<ᩚy4<4Ḅìᩚ

19í@;<ᩚ஺(4=ᐔ,2.ᨬᜧᐰ^?îᔣ^ïḄᜳG᥅FG᥅FG⊤PÁØ☢ᩞᧇóß<ஹ᥅FឋôḄᱥᳮ×H?ᱥ¢ÁØ☢Ḅᩞᧇஹ⊤☢cöXKLᨵᐵ஺3.K஺TUVḄᵨ?VUTḄᵨ--´ᵨ?^ᵨὅÖù⊝ÂVḄTUVḄᵨᙢ☢´VḄüTUVḄᵨᜧYᙢ☢´VḄü'Vab஺4.0c᝱ᑖ1eHᨵ¤ý0ÖXYþḄ0c᝱íᓫᔣ0c᝱yᨵ¤ý0ÖXYþḄ0c᝱íåᔣ0c᝱(ÿ
☢᝱)Ḅ᝱ᔣ᝱஺ᔣᔣ᝱ᩖ᝱஺ஹᑖ᪆⚪("⚪10ᑖ)1.&⚪'()*+,&,পজ/01234Ḅ356=6=90kN(T)ঝ/1-1?☢@ḄABM,=Fxl-^xlxl=60kNttঞ1-1?☢@1ஹ224ᜐḄAJKI.=-=1803xl0-"(m4)My60x103xS—60x10-3U}Q=%-61.7SMPaU1803X10-"(2)Z?☢ḄᨬᜧAJK=—L=92.6(MPa)(3)/᫡@ᨬᜧAB,ᙠ᫡Ḅ`4aABbᑮᨬᜧdef=67.5kN.mM=,=104.2SMPaU2.&⚪'()*+:

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254.ᙠ6☢|}"~Ḅ6⊝\:ᔲW"ᡈG"GᢗSᐸᢗḄ⌱ᨵef▲ᑴSஹᑖ᪆⚪M⚪10ᑖ1.";?஻=30r/min?8G8,8Ḅ஺?88ᱥC.ᓣ஺QR᜜ஹ஽B£ᔜ03mஹ0.5mB0.2m஺¥¦C.ᓣḄU஺2.᝞§ᡠ©Hª«¬\®G=200N,ὡ,=100N,a=30°,ᱥᙽB±²☢ZḄ☟᥅µ%ᦪ·=0.5஺¥¦¸ª«¬^ᱥ`78஺3.§©¹,☢J±᫡ᩞᧇ½¾!"[o]=10MPa,À®6=12cm,ÁÂᵨ,☢ÃÄÅ᱐=5/3,¥¦᫡`²ÇḄᨬᜧ₹Ë஺

264.᝞§aᡠ©J±᫡Ë₹Ì:mÍo8஺¥Î:(1)ᡃ₹Ñ)ÑÒ᫡Ḅᨬᜧ"ÓᨬᜧÔÕ"Ó;(2)Ë₹Ñ)ÑÒ᫡Ḅᨬᜧ×ᨬᜧ,ÔÕ×Ó஺Ùஹ§=⚪(M⚪5ᑖ)1.Üݧ©ᔜ᫡Ḅ"§×§஺Mc=FafiF=qlq1mmgi(a)(b)2.᝞§ᡠ©Þ⚔ᩚà᪀¥Üݧ\⚔ᩚḄÇ"§âÜã"Ḅᱥᙳaãäᡠᨵåæᜐᙳᐝèåæ஺·"é(êé)4AᔁKᫀ

27Gஹᓫ⌱⚪M⚪2ᑖ1.A2.A3.C4.C5.D6.C7.D8.B9.B10.Bîஹᑨð⚪M⚪1ᑖ1.┯ò2.┯ò3.┯ò4.┯ò5.Ô6.Ô7.Ô8.Ô9.┯ò10.┯òHஹJK⚪M⚪5ᑖ1.óôõᩚḄö÷!"4,.=4■=7rE=஺ᐸ\j=஻4=,o'A422\Ai\AùB,☢Ḅ¹#úûüᨵᐵþ,☢ḄOឋQR4=ÿᔠ᧜ᩚḄஹi☢ឋḄ஺2.$%&'ᵯ)ᩚᵯ*Ḅ+,ᵯ*-.Ḅ/0123⊝512Ḅ6'2$%ᙠ8ᩩ:);஺3.&/=ᐸ?ᵨ)AᩚBᑮ8Cᩚ;DEḄFGឋHᳮḄ〉ᵨᩩK&L$%M4.FNOPQ$%⌱ᙠ3☢STUḄSTVᜐ஺XஹYZᑖ᪆⚪^_⚪10ᑖ`1.a⚪bcdef^1`g8h,DhḄij஻2,ljজ2ᵫ2=;n஻24

28%=n—=30x-^-=18r/minr0.52ᵯ="=”=L88rad/s-3030^2`gᱥCḄjv=ra6=0.2x1.88=0.38m/sc322.a⚪bcde:1.ᑖ᪆^a`^d`ᡠ⌱ᙶ᪗xஹy,3⊝cZ8,=0F-G-Fsina=0F=G+Fsina=250NNpNpᨬᜧ☟᥅4=Z-FN=0.5x250N=125N1axᔣ;Ḅ¢ᜧ£fFpcosa=100Nxcos30°=86.6Nὡ=75N11axᡠN^c`ᱥᜐ©«᝱஺

293.a⚪bcdefa(1)᫡Ḅ½P2᜛Max=2᜛Nm11ফÀᩩK5Á=ÂÃÄ஺|A220.12x-^-=8xl0-4(m3)8x10^^lOxlO'xgxlO_4=8000N/m=8kN/mÆq=8kN/m4.a⚪bcdefaf1.᫡ḄǽP᝞aᡠÉ₹ËÌᵨᙶ᪗஻⊤஺FNÎÏÐAḄAy~~~T~᫡ḄǽPᑖÒ᝞bcᡠᨬᜧÇFQC=Fy=3ᓲ(Ó0<஻\Õ)ভA×ᨬᜧ½PᑣM(")=Fr)=F஻(l-/)(b)Ay2.ǽPḄᨬᜧÙᵫ(a)FÚÓ஻ÛÜ©ÝᡈÛÜ/ÕᓽÉ₹à▲☠ÜÐAᡈBÕᨬᜧDz(஻)äÙᨬᜧᐸÙ%Á=%æ"᪷è(b),ᵫ

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334.ᙠéឋëᑁìéíîïðñᑣºZḄòGðñ஺5.ᙠ᫡`XYZᏔ[ᵨᜐᐸ<¸vᨵô3,ᡠcḄÁZvl¡õöᵫb÷3lø÷ᡈᵫø÷3lb÷Þᐸù÷HmḄ஺6."᫡@AḄ☢<=3>úMûᔣú☢ᦑYឋÔᚖþMûᔣú☢஺7.ZḄÿឋ
ᳮ〉ᵨ〉ᵨ஺8.ᐸᜧᑣ"ᵨᙠᐸ$Ḅ&'ᜧ஺9."ᵨᙠ()$Ḅ*"+஺10.ᨵᩞᧇ/0Ḅ1᪷34ᩚ67'᪷ᩚḄ89:0.001mm,;'᪷ᩚḄ89:1mm,<=,?ὅABᔠAᎷEFὅᜧBᔠAᎷE஺GஹIJ⚪L⚪2ᑖ1."ᵨ$O*&Ḅ+3PQ஺2.᫡STᐸUV☢$ḄᨬYᔠᡂḄ[\:S&஺3.]^ᙊUV☢ᑁ0'ᙊᕜ$ᔜcḄᑗe*ᜧAfḄ஺4.☟e*

34
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ᩚᩚᩚ᪷ᩚḄᩭᑨḄ஺AB☢CD!3."#ᔜ%&'(Ḅ»A*+,Ḅ-.,ᑁᔜ*+-.Ḅ012B3ᶍ56.7ᐸ9.:;<Ḅ=ᣚᑣ@⌕ᨵCᐸDEᱥGḄ-.HIJKCL☢M-NGḄ-.Oᵫᐸ*:Q*RSTᐰ(VDᑁW.ᦋY*+,Ḅ-.4.Z[*+*:\]^_SḄᜧa2bᔣdTᐰ\]efghijḄSᜧak\]lIm஺AghijnZ[*+ḄᑗᔣKSᜧap\]BghijnZ[*+qᜧarV\]CnZ[*+ḄM-bsrV\]Dt&ᑨ5.Z[*:2uv\wḄᒴ*yz᝞|ᡠ~ᜐt᥅q₹᝞|ᡠ~ஹᑖ⊤~ḄKSᑣ"ᑡCḄ஺

39Acr,a,Ca=a"Dt&ᑨVt2ஹᑨ⚪⚪1ᑖ1.ᙠZ[ᙶ᪗Ḅᢗ7nZ[ᙶ᪗bᔣᑖᑮḄᑖḄ¡\]Ḅ஺2.@⌕Z[ᏔḄᏔ£\w¤ZᏔHwᦔᏔ஺3.᥅Ḅ'ᑗ¦w☟᥅¨ᦪ஺4.ᩚḄ!7ᩚḄᩞᧇtᐵ஺5.®¯°±ᙠ²³ᑐµḄ²ᑐ¶ᓄ¸¹º᫡஺6.¹º᫡½¾Y¿jᨬᜧᢰ2ᨬᜧ=WrVÂÃÄᙠÅÆÇᜐ஺7.᫡½¾jOeȸ☢@ᨵÉÊËᙳᒴᑖÍᐸᔠᡂḄ¯7☢ÐÑḄrÒÓᡂᏔ¤ᏔḄᑁᏔ£ᓽ¸½£஺8.᫡½¾jWÕ᫡ÖÄḄ×½¾½¾ᐸY¿ØfḄ☢_Ùk¸L☢஺9.ᙊ☢ḄÛ£¸A/,ᢥÝᩩß0àv¸d,áâ☢ḄÛ£Y¸v0.5M,,ᑣᢥÝᩩßO0\Ḅàv0.5d஺10.á+ḄM-bs¸s=br+cb,c¸®ᦪᑣ+ḄM-ãärV¸•ᩩ¾æ஺çஹ¶è⚪⚪5ᑖ1.᝞|ᡠ~Ḅ鲺êᡂ120஺çºABஹCç+Dᵨᙳ¸ÖË04=08=஺஺,îᑖ᪆¤çᔣ᪥ñR஺+Ḅ¶ᓄ஺2.CᱥGḄDᵨᦔ2CNGḄDᵨᦔᨵòóW]ô3.õö÷7ø-ᨵhùôø-7õö÷Ḅᐵ,7Dᵨ2÷DᵨḄᐵ,ᨵòóW]ô4.òóL⊝,ô᝞|ᡠ~ûᙠNG/+Dᵨᨵç[ᙳW¸ýḄ¸ஹ6ஹᐸþ17þ2ᐳ
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