
 C BÌNH



 Chuyên ngành: 
 : 62 52 01 01  2014

- V


ng dn khoa hc:

- 

   
 

             
.
- 

- 
 



, 
    
  
2

t và hai
 
 

-      

 



-    



a) b) c) d) e)
Hình 1.4 Các dng mt ct ngang thân máng
        

1.3.3 

 

1.3.4 Phân tích v  chng thm ca cu máng XMLT

              
ngoài.
4

            
14TCN 63-2002.
1.4. Mt s công ngh ch to kênh, cu máng XMLT
1.4.1 Ch to bng th công.
.
.

 
   
     
  gia






 
  c- khác nhau.


tông: 
.  
. 
  
tông 


máng XMLT



o
+ m
1
)
y
+ b
y
y
+ C
y
y
= F
a

OY, N/m; b
y
     
        


 m
0
+ m
1


2
2 cos
a
y oy
F
y h y y t
M

  
(1.8) 
a
= m
o

2

( y
0
cos

1
t +
00
1
y
y h y



1
t ) 

   
 
 
 
2 2 2 2
0 1 0 1
1
2
2 2 2 2
0
2
2 2 2 2
0
cos sin




(1.9)

22
10yy
h



y
ht
e

.
7

        
sau:
 
cos
ay
y y t



(1.10)

y






(1.12)




          theo các 

            
 và 
    


Các tài






 

8

C
MÁY 

tg V V



os 1,sinc
  


c:
T
x
= -
y
= - , suy ra là
T
x
-T và
T
y
- T= -T V
y
/V
x


x

y
 V
y
Hình 2.2. 
1.Bàn
ng 4.Lò xo ngang
2. 
2
0 1 x x 0
2
0 1 y y 0
(m m )x b .x C .x m .r. .cos t (a)
(m m )y b .y C .y m .r. .sin t (b)

     


     


(2.5)

o
-
1
-
 
o
(kg); C
x
, C

x
M 4h


    
;
 
2
0
a
2
2 2 2 2
oy y
mr
y
M 4h


    

10

2
0 ox
22
ox
2
ch
a
xx

x
h



ch
x

- Ox


     




lv
=

a


a

ax
/ V
ay


tt
ox






2
tt
lv
oy
2
kn
M.ω
ΣC
e

(N/m) (2.23)
e
kn

kn

trí m
y

a
     
(2.9) :

2
2 2 2 2 2
1000. .
( ) 4 .
o lv
a
ox lv x lv
mr
X
Mh

  


(mm) (2.9)
Thay m
0

ox
= 305,32 (rad/s),
h
x


a
= 0,7944 (mm).

= 314 (rad/s), X
a
= 0,7944 (mm) vào (2.42) ta có :

a
X
= 10
-3
. 0,7944.314
2
= 78,32 (m/s
2
).




2
2 2 2 2 2
1000. .
( ) 4 .
o lv
a
oy lv y lv
mr
Y
Mh

  



2
(m/s
2
) (2.56)
Thay 
lv
= 314 (rad/s), Y
a
= 0,48686 (mm) vào (2.56) ta có

a
= 0,48686.314
2
.10
-3
= 48 (m/s
2
)


2
Vm
o
r = 0,46 (kg.m); M = 1500 (kg); h
x
=60 (1/s) ; h
y
=50(1/s);
ox

 sau:

 th hàm s V
ax

ay


2.4.3. Kho sát hàm gia tc
T  th trên, t biu thc (2.71), (2.72) v  th gia
tc-tn s ( sau:

 th hàm s
a
X

a






14 Hình 2.15  quy trình tính toán có tr giúp ca máy tính
15

Kt lu



lv
=314 rad/s
              
22
0,7944 0,4869 0,932A   


lv
=314 rad/s).
16


lv


Y 

3.1. T  
3.1.1. 
3.1.1.1.Các mô h
dùng ph
Mô hình
 

3.1.1.2.Chun s ng dnh chun s ng dng
  
, 
 tính toán thi

        :
-

 



Các thông s ng lc h c 
phù hp vi yêu cu công ngh, có th c b sung, sa i thit k
 có kt qu ti sn phm. Vi các s liu 
bng 3.2: m
o
r = 0,046 (kg.m); M = 200 (kg); C
t
ox
= 133278 (N/m);
C
t
oy
= 46078,3 (N/m); h
x
= 70 (1/s); h
y
= 60 (1/s) và theo quy trình
tính toán  hình 2.15, ta xây d th sau:

18

a) B - X
a

3.1.3.5. 
 hành   

o
r khác nhau

19

3 máy rung
mô hình: 
            Xây



- 
o
r .
 -:

a
 Hình 3.29  th X
a
- i m
o
r = 0,046 kg.m
ng Y
a

n
 t

21

a)  

. 

o
r = 0,046 kg.m).


.
Hình 3.36 Quan h gia áp lc thm - thi gian rung - 


, 
m
o

o
r = 0,036

o



trng nhi vi kt cu v mng XMLT nói chung và cu máng
23

 có th tính
trc ti           nh qua thc
nghim  chng thm ch thông qua thc nghim.

2. Phân tích ni lc ca c
h ph    u dm và phân tích
theo h không gian dùng phân tích kt cu v mng, áp d
pháp phn t hu hn tính theo chuyn v và ng dng phn mm
 tính toán ng sut và bin dng ca kt cu vi mt thông s
u vào quan tri E bê tông có th i do
các thông s máy rung.

3  ch to kt cu bê tông và
XMLT, làm rõ các tính chn v n ca hn hp bê tông
n tính chm cht, phân tích các nguyên nhân
và bi m lèn ch ng có l
bn và tính chng thm ca bê tông và cu máng XMLT.

4. Nghiên cu t mô hình c to cu
máng XMLT thm c
 m cht hn hp bê tông, luh  xut mt mô
hình máy rung hoàn toàn mo cng
i dng tuyn tính hóa ma sát ca chuyng ca
va bê tông trong mô hình mu qu m cht bê tông,