2.

2.

2

3

4

5

6

7

1

2

3

4

5

(p)

（S）

1.

IV

T0

5.

1.

H1=H2=4m, 8m,

G1=G2=1176KN,

m1=m2=120000kg,

4OOmmx400mm,

K1=K2=20000KN/m

(10

8

8

[K]=K1+K2

—K2] K11

K2IE

K12]_40.

K22_H__20.

-20. xlO6(N/m)

20.

[K=

ml

0]jGl/g

m2]"L0

[0

o1=I

2

|AT1I

K2\

1.2

105(

K\2

—oK22_m23,

2=1/2(ATI\/m\+K22/m2)+J1/4(K11/

co；

=63.66

of=436.339

cox=7.98/J

?=20.89/5

K22//2

-(Kl1K22-K12K21)/212

Tx=2Na)

x=0.795

T=2/z7◎=0.301S

Xll_ -K\2

X2?~

X^\(KI1

XUX2\[K21

0.003xl()6=0

0.618

1

X12

—K12

K11

_-1?618

1

K\2

K22

X22>={0.618

-20

20

-1.618

x!06

GF600KN,GF500KN,

(15

(15

X"().488 1.710

X,2 1.00() X22J=］卜00()

T2=

(0

=aIG,/1X11=41.88KNF2l=alG2ylX2l=71.514KN

3

2=a2Gj2Xl2=38.25KNF22=a2G2y2X22=—18.64AW

3

V2 73.90(KN)

2

VI 2+( 2+ 2=115.0750

3. G,=2700KNG2=2700KNG3=1800KN,

Ki=245000KN/m.K2=195000KN/m.6=98000KN/m, HF3.5m.H2=3.5m.

H3=3.5m, 8

7.

1,2,3

"1=(6+G2+G3)/KI=O.O294/H"2="1+(G2+G3)/K2=O.O525/Mz/3=“2+G3/K3=0.0709/71

=0.4655

AGhdi+G2u22+G3u32

T\= \G\ul+G2u2+G3u3

amax

=0.16

0?4

JX1OXO16=，

n<i.4rv=0.355,

FEK=aGy=0.14x0.85x(2700+2700+1800)=856*KN

G\H\

G1H1+G2H2+G3H3 7136KW

G2H2

G1HI+G2H2+G3H3 342.72K/V

G3H3

G\H\+G2H2+G3H3

H\=h\

H2=IA+h2

H3=/A+h2+h3

TOC\o"1-5"\h\z

10

V2.V3.X4.X5.X6.V7.V8.X9.V10.X

20 1 20

8 9

9

20

4. 5

8.

9.

1.

3

6

7

9.

1.A2.A3.AC4.A5.

A

1.

10

B

B11

CD

C12 D13

4

B

D

10%B

2%—3%C D50%

)0

B CD

10

2.C3.B

2.

2.

3.

5.

6.

40m,

1.

(10

180

200

260

420

530

2.

8

0.2g,III

mi=,m2-,m3

TF,8n=,￡=.(20

6

7

8

9<

(s)

I

II

III

IV

1.(1)

vs>500m/s

+++=20.7m>20m,do=2Om

(2)

20?

TOC\o"1-5"\h\z

v=—— — — -——=244.47 s

"sc2.2 5.8 &2 3.8

+ + +

180 200 260 420

2 Tgamax=

Tg<T1<5Tga,=,)°x0.16=(_2dl)ox0.16=0.105

0.716

6nFEK=0.0673x250.95=16.89

G/J7j=[116.62x6.5+110.85xl2.5+59.45x(5.0+6.0+6.5)]x9.8=3184.03x9.8=31203.49

g2h:

(1

(1

(1

116.62x6.5

3184.03

x(l-0.0673)x250.95=55.72kN

% 110.85x12.5x(i-0.0673)x250.95=101