1
1-1
杞绘煷娌瑰湪娓╁害
15
o
C
鏃剁浉瀵瑰瘑搴︿负
0.83
锛屾眰瀹冪殑瀵嗗害鍜岄噸搴︺�?/p>
瑙ｏ細瀵嗗害涓?/p>
830kg/m
3
锛岄噸搴︿负
8134N/m
3
銆?/p>
1-2
鐢樻补鍦ㄦ俯搴?/p>
0
o
C
鏃跺瘑搴︿负
1.26g/cm
3
锛屾眰浠ュ浗闄呭崟浣嶈〃绀虹殑瀵嗗害鍜岄噸搴︺�?/p>
瑙ｏ細瀵嗗害涓?/p>
1260kg/m
3
锛岄噸搴︿负
12348N/m
3
銆?/p>
1-3
姘寸殑浣撶Н寮规�х郴鏁颁负
1.96
脳
10
9
N/m
2
锛岄棶鍘嬪己鏀瑰彉澶氬皯鏃讹紝瀹冪殑浣撶Н鐩稿鍘嬬缉
1%
锛?/p>
瑙ｏ細
E=d
p
/(dV/V)
锛?/p>
d
p
=E
路
dV/V=1.96
脳
10
9
脳
0.01=1.96
脳
10
7
Pa
1-4
瀹圭Н
4m
3
鐨勬按锛屾俯搴︿笉鍙橈紝褰撳帇寮哄鍔?/p>
10
5
N/m
2
鏃跺绉噺灏?/p>
1000cm
3
锛屾眰璇ユ按鐨勪綋绉帇
缂╃郴鏁?/p>
尾
p
鍜屼綋绉脊鎬х郴鏁?/p>
E
銆?/p>
瑙ｏ細
尾
p
=dV/(V
路
d
p
)=1000
脳
10
锛?/p>
6
/(4
脳
10
5
)=2.5
脳
10
锛?
9
m
2
/N
E=1/
尾
p
=1/(2.5
脳
10
锛?
9
)=4
脳
10
8
N/m
2
1-5
鐢?/p>
200L
姹芥补妗惰鐩稿瀵嗗害
0.70
鐨勬苯娌癸紝鐏岃鏃舵恫闈笂鍘嬪己涓?/p>
1
涓ぇ姘斿帇銆傚皝闂悗鐢变簬
娓╁害鍗囬珮浜?/p>
20
o
C
锛屾鏃舵苯娌硅捀姘斿帇涓?/p>
0.18
澶ф皵鍘嬨�傝嫢姹芥补鑶ㄨ儉绯绘暟涓?/p>
0.0006
o
C
锛?
1
锛屽脊鎬х郴
鏁颁负
14000kg/cm
2
锛岃瘯璁＄畻鐢变簬鍘嬪姏鍙婃俯搴﹀彉鍖栨墍澧炲噺鐨勪綋绉紵闂亴妗舵椂姣忔《鏈�澶氫笉瓒呰繃澶?/p>
灏戝叕鏂や负瀹滐紵
瑙ｏ細
E=14000kg/cm
2
=14000
脳
9.8/10
锛?
4
Pa=1.372
脳
10
9
Pa
锛?/p>
E=
锛?/p>
Vd
p
/dV
1
dV
1
=
锛?/p>
Vd
p
/E=
锛?/p>
0.18
脳
9.8
脳
10
4
V/(1.372
脳
10
9
)=
锛?/p>
1.286
脳
10
锛?
5
V
锛?/p>
尾
t
=dV
2
/(V
路
d
t
)
dV
2
=
尾
t
路
d
t
V=0.0006
脳
20V=0.012V
锛?/p>
鍒欙細
V+ dV
1
+ dV
2
=200
锛屾晠
V=197.63L
m=
蟻
V=700
脳
197.63
脳
10
锛?
3
=138.34kg
1-6
鐭虫补鐩稿瀵嗗害涓?/p>
0.9
锛岀矘搴︿负
28cP
銆傛眰杩愬姩绮樺害涓哄灏?/p>
m
2
/s
锛?/p>
瑙ｏ細
蠀
=
渭
/
蟻
=0.028/900=3.11
脳
10
锛?
5
m
2
/s
銆?/p>
1-7
鐩稿瀵嗗害
0.89
鐨勭煶娌癸紝娓╁害
20
o
C
鏃剁殑杩愬姩绮樺害涓?/p>
40cSt
銆傛眰鍔ㄥ姏绮樺害涓哄灏戯紵
瑙ｏ細
渭
=
蠀
蟻
=40
脳
10
锛?
6
脳
890=0.0356Pa
路
s
銆?/p>
1-8
涓�骞虫澘鍦ㄦ补闈笂浣滄按骞宠繍鍔紝宸茬煡杩愬姩閫熷害
u
=1m/s
锛屾澘涓庡浐瀹氳竟鐣岀殑璺濈
未
=1mm
锛屾补
鐨勫姩鍔涚矘搴?/p>
渭
=1.147Pa
路
s
锛岀敱骞虫澘鎵�甯﹀姩鐨勬补灞傜殑杩愬姩閫熷害鍛堢洿绾垮垎甯冿紝姹備綔鐢ㄥ湪骞虫澘鍗曚綅
闈㈢Н涓婄殑绮樻�ч樆鍔涗负澶氬皯锛?/p>
瑙ｏ細
蟿
=
渭
du/dy
=
渭
u/
未
=1.147
脳
1/0.001=1147N/m
2
銆?/p>
棰?/p>
1-8
鍥?/p>
棰?/p>
1-9
鍥?/p>
1-9
濡傚浘绀烘椿濉炴补缂革紝
鍏剁洿寰?/p>
D
=12cm
锛?/p>
娲诲鐩村緞
d
=11.96cm
锛?/p>
娲诲闀?/p>
L
=14cm
锛?/p>
娌圭殑
渭
=0.65P
锛?/p>
褰撴椿濉炵Щ鍔ㄩ�熷害涓?/p>
0.5m/s
鏃讹紝璇曟眰鎷夊洖娲诲鎵�闇�鐨勫姏
F
=
锛?/p>
瑙ｏ細
F
=
渭
Adu/dy
锛?/p>
渭
=0.065Pa
路
s
锛?/p>
b
=(
D
锛?/p>
d
)/2=(12
锛?/p>
11.96)/2=0.02cm
锛?/p>
du
/
dy
=
u
/
b
=0.5/0.0002=2500/s
锛?/p>
A
=
蟺
dL
=3.14
脳
0.1196
脳
0.14=0.0526m
2
锛?/p>
F
=0.065
脳
0.0526
脳
2500=8.54N
銆?/p>