璇惧悗涔犻
绗竴绔?/p>
娴佷綋娴佸姩
銆愪緥
1-1
銆?/p>
宸茬煡纭吀涓庢按鐨勫瘑搴﹀垎鍒负
1830kg/m3
涓?/p>
998kg/m3
锛岃瘯姹傚惈纭吀涓?/p>
60%
锛堣川閲忥級鐨勭～閰告按婧舵恫鐨勫瘑
搴︿负鑻ュ共銆?/p>
瑙ｏ細鏍规嵁寮?/p>
1-4
=
锛?/p>
3.28+4.01
锛?/p>
10-4=7.29
脳
10-4
蟻
m=1372kg/m3
銆愪緥
1-2
銆?/p>
宸茬煡骞茬┖姘旂殑缁勬垚涓猴細
O221%
銆?/p>
N278%
鍜?/p>
Ar1%
锛堝潎涓轰綋绉?/p>
%
锛?/p>
锛岃瘯姹傚共绌烘皵鍦ㄥ帇鍔涗负
9.81
脳
104Pa
鍙婃俯搴︿负
100
鈩冩椂鐨勫瘑搴︺�?/p>
瑙ｏ細棣栧厛灏嗘憚姘忓害鎹㈢畻鎴愬紑灏旀枃
100
鈩?/p>
=273+100=373K
鍐嶆眰骞茬┖姘旂殑骞冲潎鎽╁皵璐ㄩ噺
Mm=32
脳
0.21+28
脳
0.78+39.9
脳
0.01
=28.96kg/m3
鏍规嵁寮?/p>
1-3a
姘斾綋鐨勫钩鍧囧瘑搴︿负锛?/p>
銆愪緥
1-3
銆?/p>
鏈闄勫浘鎵�绀虹殑寮�鍙ｅ鍣ㄥ唴鐩涙湁娌瑰拰姘淬�傛补灞傞珮搴?/p>
h1=0.7m
銆佸瘑搴?/p>
蟻
1=800kg/m3
锛屾按灞傞珮搴?/p>
h2=0.6m
銆佸瘑搴?/p>
蟻
2=1000kg/m3
銆?/p>
锛?/p>
1
锛夊垽鏂笅鍒椾袱鍏崇郴鏄惁鎴愮珛锛屽嵆
pA=p'A pB=p'B
锛?/p>
2
锛夎绠楁按鍦ㄧ幓鐠冪鍐呯殑楂樺害
h
銆?/p>
瑙ｏ細
锛?/p>
1
锛夊垽鏂缁欎袱鍏崇郴寮忔槸鍚︽垚绔?/p>
pA=p'A
鐨勫叧绯绘垚绔嬨�傚洜
A
涓?/p>
A'
涓ょ偣鍦ㄩ潤姝㈢殑杩為�氱潃鐨勫悓涓�娴佷綋鍐咃紝骞跺湪
鍚屼竴姘村钩闈笂銆傛墍浠ユ埅闈?/p>
A-A'
绉颁负绛夊帇闈€�?/p>
pB=p'B
鐨勫叧绯讳笉鑳芥垚绔嬨�傚洜
B
鍙?/p>
B'
涓ょ偣铏藉湪闈欐娴佷綋鐨勫悓涓�姘村钩闈笂锛屼絾涓嶆槸杩為�氱潃鐨勫悓涓�绉嶆祦浣擄紝鍗虫埅闈?/p>
B-B'
涓嶆槸绛夊帇闈€�?/p>
锛?/p>
2
锛夎绠楃幓鐠冪鍐呮按鐨勯珮搴?/p>
h
鐢变笂闈㈣璁虹煡锛?/p>
pA=p'A
锛岃�?/p>
pA=p'A
閮藉彲浠ョ敤娴佷綋闈欏姏瀛﹀熀鏈柟绋嬪紡璁＄畻锛屽嵆
pA=pa+
蟻
1gh1+
蟻
2gh2
pA'=pa+
蟻
2gh
浜庢槸
pa+
蟻
1gh1+
蟻
2gh2=pa+
蟻
2gh
绠�鍖栦笂寮忓苟灏嗗凡鐭ュ�间唬鍏ワ紝寰?/p>
800
脳
0.7+1000
脳
0.6=1000h
瑙ｅ緱
h=1.16m
銆愪緥
1-4
銆?/p>
濡傛湰棰橀檮鍥炬墍绀猴紝
鍦ㄥ紓寰勬按骞崇娈典袱鎴潰
锛?/p>
1-1'
銆?/p>
2-2'
锛?/p>
杩炰竴鍊掔疆
U
绠″帇宸锛?/p>
鍘嬪樊璁¤鏁?/p>
R=200mm
銆?/p>
璇曟眰涓ゆ埅闈㈤棿鐨勫帇寮哄樊銆?/p>
瑙ｏ細鍥犱负鍊掔疆
U
绠★紝鎵�浠ュ叾鎸囩ず娑插簲涓烘按銆傝绌烘皵鍜屾按鐨勫瘑搴﹀垎鍒负
蟻
g
涓?/p>
蟻
锛屾牴鎹祦浣撻潤鍔涘鍩烘湰鍘熺悊锛?/p>
鎴潰
a-a'
涓虹瓑鍘嬮潰锛屽垯
pa=pa'
鍙堢敱娴佷綋闈欏姏瀛﹀熀鏈柟绋嬪紡鍙緱
pa=p1
锛?/p>
蟻
gM
pa'=p2
锛?/p>
蟻
g
锛?/p>
M
锛?/p>
R
锛夛紞
蟻
ggR
鑱旂珛涓婁笁寮忥紝骞舵暣鐞嗗緱
p1
锛?/p>
p2=
锛?/p>
蟻
锛?/p>
蟻
g
锛?/p>
gR