材料力学网上作业题参考答?- 百度文库

7.

1-1棺?maxTT??53kpa2-2棺?max??20.5kpa WpWp?T?28.5kpa Wp

3-3棺?max8. Ӧ

?max?T?TD/2??15.9Mpa4Ip?D(1??4)32

?min?T?Td/2??12.35Mpa

4Ip?D(1??4)32T?0.284o4m?D4 G?(1??)32??T180??GIP?9. Ťأ

ABΣŤأ BCΣΪŤأ

Ӧ㣺ŤزͬӦֱÿںӦֵȻԱȽҵӦֵ

ABΣ BCΣ

ȽϵӦBCΣֵΪ

ŤתǣڸŤطһ£ŤתǼΪ᳤ŤתǡʹŤתǹʽʱע⵽ʽʹ

==

P44.110.⣺T?9550?9550??1754.8N.m

n240T16T3?60.7mm ?[?]d?ǿֱ???[?]Wpնֱ?11. 1żصļ

2洫ݵŤ

?T18032T180??59.8mmȡd=60.7mm ??[?]d?4G?[?]?GIp?

T?[?] 3ʵֱ??Wpѡd=45mm.

(4)⡢ѡ ѡ ԡ 12. ǿ㣺?1?1T16TT16T?? ?2?,?=

32Wp?D13Wp?D1-?4?1??2,D=286mm

13. TP3?9550?9550??1061.1N.m

n27T16T3?[?]d??51.3mm ǿֱ??Wp?[?]14. ǿֱ??T16T?[?]d?3?79.9mm Wp?[?]

T18032T1804??[?]d???73.5mmȡd=80mm նֱ??GIp?G?[?]?15.

һʽ

1.:ΪҪεĹΪ

2.Գ:ͨߺͽԳƽΪԳ档

3.Գ: ͨߵԳ桢ϵڸöԳʱκԽλڸöԳڵһߣԳ

4.: ʱеķֲϵĺΪ 5.: ʱ洹ֱķֲϵĺżء

6.: һ£ϵļλö仯ģλߵ

xʾϵļԱʾΪxĺQ=Q (x)ͨѹϵʽΪļ̡

7.ط: һ£ϵλö仯ģλߵxʾϵضԱʾΪxĺM=M(x)ͨѹϵʽΪط̡

1.ڼôļͼͻ䣬ͻֵ֮ΪôСͼڴ˴һ۽ǡ 2. ڼżôļͼޱ仯ͼͻ䣬ͻֵ֮ΪôżС 3. 𣺼ͼijбʵڸôķֲغɼȡ 4. ͼijбʵڸôļ

dQ(x)dM(x)=q(x)=Q(x) dxdx6. ʱʹ˳ʱתļ涨Ϊ֮Ϊ˵ȡΪо󣬼ΪΪʹ²ϲѹع涨Ϊ֮Ϊ 7. 𣺣1ϵļQֵϵڸýһࣨҲࣩƽзͶ

5.

ӰĴ͡Q=?Yiʱʹѡȡо˳ʱ뷽תʱʽұȡţ֮ȡš˹ɿɼ򻯼ΪΪ෴Ϊ

2ϵMֵϵڽһࣨҲࣩԸýOصĴ͡M??Mo(Fi)

8. 𣺼Ϊʽ֧

l3l3ql2?0 ã MB?1. ⣺֧ƽ̵ⷽã?M?0MB?q??B248RB?q??Fy?0

صĹ

lql?0RB?22

qlql23ql2Q3??M3?? M2??2882.

֧

ɣRBl?F?2l2F?0RB?33

Fɣ RA?

3صĹQ1?2Fl2FFM1?Q2??933M2?2Fl2FQ3??93M3?0

3. ԭͼFPͬ

4. 5. 6.

7. AΪԭ㣬һ˵ľΪx : Q(x)??qx(0?x?l)

qx2ط: M(x)??(0?x?l)

2Qmax?ql, Mmaxql2 ?2x?l)ط: M(x)?M(0?x?l)

8.AΪԭ㣬һ˵ľΪx : Q(x)?0(0?Qmax?0, MԼRAmax?Me

?MelBԼRB??Me¡ lAΪԭ㣬һ˵ľΪx : Q(x)?MeM(0?x?l)ط: M(x)?e?Me(0?x?l) llMmaxQmax?10. 11. 12.

Mel,

?Me

maxQmax?200NM?950N.m ?355N.m

Qmax?2667NMQmax?F, Mmaxmax?Fa

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