天沟怎么计算,如图! 天沟的大小计算是怎么算出来的
\u5929\u6c9f\u5de5\u7a0b\u91cf\u8ba1\u7b97\u600e\u4e48\u7b97
\uff08\u793a\u610f\u56fe\uff09
1\u3001\u9014\u4e2d\u7ea2\u6846\u5185\u7684\u90e8\u5206\u5c31\u662f\u5929\u6c9f2\u3001\u8ba1\u7b97\u6311\u6a90\u5929\u6c9f\u5de5\u7a0b\u91cf\u53ef\u4ee5\u6309\u6311\u6a90\u5929\u6c9f\u90e8\u5206\u7684\u4e2d\u5fc3\u7ebf\u4e58\u4e0a\u5b83\u7684\u622a\u9762\u9762\u79ef(\u5305\u62ec\u5782\u76f4\u6c34\u5e73\u4e24\u90e8\u5206)3\u3001\u4e5f\u53ef\u4ee5\u6309\u697c\u5468\u957f\u52a0\u4e0a\u5916\u6311\u90e8\u5206\u7684\u56db\u89d2\u5916\u6311\u957f\u5ea6\u4e00\u534a\u4e584\u518d\u4e58\u4e0a\u539a\u5ea6\u4e58\u5bbd\u5ea6\u6309\u4f53\u79ef\u8ba1\u7b974\u3001\u8ba1\u7b97\u5de5\u7a0b\u91cf\u7684\u8bdd\u5206\u6210\u5782\u76f4\u3001\u6c34\u5e73\u4e24\u90e8\u5206\uff0c\u6309\u8bbe\u8ba1\u56fe\u793a\u5c3a\u5bf8\uff08\u697c\u7684\u5468\u957f*\u539a\u5ea6*\u5bbd\u5ea6\u6309\uff09\u4f53\u79ef\u8ba1\u7b97\u30025\u3001\u5982\u679c\u4f60\u81ea\u5df1\u5f04\u4e0d\u660e\u767d\uff0c\u6216\u6ca1\u65f6\u95f4\u8ba1\u7b97\uff0c\u5efa\u8bae\u627e\u4ee3\u7b97\uff0c\u6839\u636e\u60c5\u51b5\u4e0d\u540c\uff0c\u8d39\u7528\u4e0d\u7b49\u3002\u4e00\u3001\u5176\u4ed6\u65b9\u6cd51\u3001\u4f60\u53ef\u4ee5\u641c\u7d22\u4e0b \u5c0f\u8682\u8681\u7b97\u91cf \uff0c\u80fd\u505a\u5de5\u7a0b\u91cf\u8ba1\u7b97\u3001\u9884\u7b97\uff0c\u9ad8\u8d28\u3001\u9ad8\u65482\u3001\u4f60\u53ef\u4ee5\u5728\u7f51\u4e0a\u641c\u4e0b\u9884\u7b97\u9020\u4ef7\u5355\u4f4d\uff0c\u6709\u4e00\u4e9b\u5355\u4f4d\u505a\u7684\u6bd4\u8f83\u597d3\u3001\u4f60\u53ef\u4ee5\u53bb\u7b2c\u4e09\u65b9\u5e73\u53f0\u59d4\u6258\u522b\u4eba\u505a\uff0c\u5e73\u53f0\u4e0a\u6ce8\u610f\u9632\u9a97\uff0c\u4f60\u53ef\u4ee5\u627e\u5355\u4f4d\u3001\u4e5f\u53ef\u4ee5\u627e\u4e2a\u4eba\u6765\u505a\u3002\u4e8c\u3001\u6ce8\u610f\u70b91\u3001\u8ba1\u7b97\u5de5\u7a0b\u91cf\u5e94\u6309\u7167\u5de5\u7a0b\u6240\u5728\u5730\u7684\u5b9a\u989d\u6216\u89c4\u5b9a\u6807\u51c6\u8ba1\u7b97\uff1b2\u3001\u5de5\u7a0b\u91cf\u8ba1\u7b97\u719f\u6089\u5b9a\u989d\u3001\u89c4\u5b9a\u662f\u57fa\u7840\uff1b3\u3001\u8ba1\u7b97\u5de5\u7a0b\u91cf\u524d\u770b\u6e05\u695a\u56fe\u7eb8\u662f\u524d\u63d0\uff0c\u5e94\u6ce8\u610f\u5c0f\u7684\u6ce8\u91ca\uff0c\u4ee5\u514d\u770b\u6f0f\u770b\u9519\u662f\u8ba1\u7b97\u7ed3\u679c\u51fa\u73b0\u9519\u8bef\uff1b4\u3001\u5de5\u7a0b\u91cf\u8ba1\u7b97\u539f\u5219\u4e0a\u662f\u4e0d\u5141\u8bb8\u9519\u8bef\u7684\uff0c\u5e0c\u671b\u4e0d\u8981\u62b1\u4fa5\u5e78\u6001\u5ea6\u53bb\u8ba1\u7b97\u5de5\u7a0b\u91cf\u3002
1
H
W
L
B
L
1
\u5916\u5929\u6c9f
\u5185\u5929\u6c9f
\u843d\u6c34\u7ba1
\u5929\u6c9f\u65ad\u9762\u53ca\u843d\u6c34\u7ba1\u8ba1\u7b97
\u6bcf\u4e00\u4e2a\u843d\u6c34\u53e3\u6240\u5206\u62c5\u4e4b\u96e8\u6c34\u91cf\u8ba1\u7b97\uff1a
\u5c4b\u9762\u957f\u5ea6\uff1a
L
\uff08
m
\uff09
\u5c4b\u9762\u5bbd\u5ea6\uff1a
B
\uff08
m
\uff09
\u96c6\u6c34\u9762\u79ef\uff1a
Ar=B
L
\uff08
m
2
\uff09
\u96e8
\u6c34
\u91cf
\uff1a
Qr=Ar
I
10
-3
/3600
\uff08
m
3
/sec
\uff09
\u964d\u96e8\u5f3a\u5ea6\uff1a
I
\uff08
mm/hr
\uff09
\u6ce8\uff1a
1
\uff0e\u5929\u6c9f\u7531
1000mm
\u5bbd\u677f\u6298\u6210\u3002
2\uff0e\u8ba1\u7b97\u5185\u5929\u6c9f\u65f6L\u7528L
1
\u6765\u53d6\u4ee3\u3002
\u5916\u5929\u6c9f\u65ad\u9762\u6838\u7b97
:
\u5929\u6c9f\u6392\u6c34\u91cf\u91c7\u7528\u66fc\u5b81\u516c\u5f0f\u8ba1\u7b97\uff1a
Qg=Ag
Vg =Ag
R
2/3
S
1/2
/n
Ag=W
H
W
R=Ag/(W+2H
W
)
Vg
\uff1a\u5929\u6c9f\u6392\u6c34\u901f\u5ea6
(m/sec)
N
\uff1a
sus
\u6216\u5f69\u8272\u677f\u78e8\u64e6\u7cfb\u6570
=0.0125
S
\uff1a\u5929\u6c9f\u6cc4\u6c34\u5761\u5ea6
=1/1000
W
\uff1a\u5929\u6c9f\u5bbd\u5ea6\uff08
m
\uff09
H
\uff1a\u5929\u6c9f\u6df1\u5ea6\uff08
m
\uff09
Hw
\uff1a\u8bbe\u8ba1\u6700\u5927\u6c34\u6df1\uff08
m
\uff09
\uff08\u901a\u5e38\u53d6
0.8H
\uff09
FOR Qg
Qr
\u4f7f\u7528\u5929\u6c9f\u65ad\u9762\u5982\u53f3\uff1a
2
\u843d\u6c34\u7ba1\u8ba1\u7b97
:
Qd=m
A
d
(2gH
W
)
1/2
\uff08
m
3
/sec
\uff09
M
\uff1a\u843d\u6c34\u7ba1\u652f\u6570
=1
\u652f
d
\uff1a\u843d\u6c34\u7ba1\u5916\u5f84\uff08
m
\uff09
Ad
\uff1a\u843d\u6c34\u53e3\u9762\u79ef\uff08
m
2
\uff09
g
\uff1a\u91cd\u529b\u52a0\u901f\u5ea6
=9.8 m/sec
H
W
\uff1a\u5929\u6c9f\u6700\u5927\u6c34\u6df1\uff08
m
\uff09
FOR Qd
Qr
\u4f7f\u7528\u843d\u6c34\u7ba1\u7684\u7ba1\u5f84\u5927\u5c0f
!!
\u5de5\u7a0b\u540d\u79f0\uff1a\u8303\u4f8b
\u5382\u623f\u6240\u5728\u5730\uff1a\u676d\u5dde
\u964d\u96e8\u5f3a\u5ea6
I=150mm/hr
\u6bcf\u4e00\u4e2a\u843d\u6c34\u53e3\u6240\u5206\u62c5\u4e4b\u96e8\u6c34\u91cf\u8ba1\u7b97\uff1a
\u5c4b\u9762\u957f\u5ea6\uff1a
L=40m
\u5c4b\u9762\u5bbd\u5ea6\uff1a
B=7m
\u96c6\u6c34\u9762\u79ef\uff1a
Ar=B
L=40
7=280m
2
\u96e8\u6c34\u91cf\uff1a
Qr=Ar
I
10
-3
/3600
=280
150
10
-3
/3600=0.012m
3
/sec
\u5929\u6c9f\u65ad\u9762\u6838\u7b97
:
\u5929\u6c9f\u6392\u6c34\u91cf\u91c7\u7528\u66fc\u5b81\u516c\u5f0f\u8ba1\u7b97\uff1a
Ag=W
Hw=0.3
0.16=0.048
R=Ag/(W+2H
W
)
3
200
300
=0.048/(0.3+0.16
2)=0.077
Qg=Ag
Vg =Ag
R
2/3
S
1/2
/n
=0.048
0.077
2/3
0.001
1/2
/0.0125=0.022 m
3
/sec
Vg
\uff1a\u5929\u6c9f\u6392\u6c34\u901f\u5ea6
(m/sec)
n
\uff1a
sus
\u6216\u5f69\u8272\u677f\u6469\u64e6\u7cfb\u6570
=0.0125
S
\uff1a\u5929\u6c9f\u6cc4\u6c34\u5761\u5ea6
=1/1000
W
\uff1a\u5929\u6c9f\u5bbd\u5ea6\uff08
m
\uff09
H
\uff1a\u5929\u6c9f\u6df1\u5ea6\uff08
m
\uff09
Hw
\uff1a\u8bbe\u8ba1\u6700\u5927\u6c34\u6df1\uff08
m
\uff09
\uff08\u901a\u5e38\u53d6
0.8H
\uff09
FOR Qg
Qr
\u4f7f\u7528\u5929\u6c9f\u65ad\u9762\u5982\u53f3\uff1a
\u843d\u6c34\u7ba1\u8ba1\u7b97
:
A
d
=
\u03c0
R
2
=
\u03c0
0.05
2
=0.00785m
2
Qd=m
A
d
(2gH
W
)
1/2
=1
0.00785
(2
9.8
0.15)
1/2
=0.0135
\uff08
m
3
/sec
\uff09
m
\uff1a\u843d\u6c34\u7ba1\u652f\u6570
=1
\u652f
d
\uff1a
\u843d\u6c34\u7ba1\u5916\u5f84\uff08
m
\uff09
Ad
\uff1a\u843d\u6c34\u53e3\u9762\u79ef\uff08
m
2
\uff09
g
\uff1a\u91cd\u529b\u52a0\u901f\u5ea6
=9.8 m/sec
H
W
\uff1a\u5929\u6c9f\u6700\u5927\u6c34\u6df1\uff08
m
\uff09
FOR Qd
Qr
\u4f7f\u7528\u4e00\u652f
100mm
\u843d\u6c34\u7ba1
!!
将截面划分成矩形、梯形、三角形、弓形(扇形-三角形)分别计算后相加。
你要算什么
绛旓細3銆佹婚噸锛氬崟鏉澶╂矡閲嶉噺*澶╂矡鏉℃暟锛堝弬鐓ч洦绡风粨鏋勫浘锛4銆佸鏋滀綘鑷繁寮勪笉鏄庣櫧锛屾垨娌℃椂闂璁$畻锛寤鸿鎵句唬绠楋紝鏍规嵁鎯呭喌涓嶅悓锛岃垂鐢ㄤ笉绛夈備竴銆佸叾浠栨柟娉 1銆佷綘鍙互鎼滅储涓 灏忚殏铓佺畻閲 锛岃兘鍋氬伐绋嬮噺璁$畻銆侀绠楋紝楂樿川銆侀珮鏁 2銆佷綘鍙互鍦ㄧ綉涓婃悳涓嬮绠楅犱环鍗曚綅锛屾湁涓浜涘崟浣嶅仛鐨勬瘮杈冨ソ 3銆佷綘鍙互鍘荤涓夋柟骞冲彴濮旀墭...
绛旓細鎸戞獝澶╂矡 涓庢澘(鍖呮嫭灞嬮潰鏉裤佹ゼ鏉)杩炴帴鐨勶紝浠ュ澧欎负鍒嗙晫绾匡紱涓庡湀杩囨(鍖呮嫭鍏朵粬姊)杩炴帴鐨勶紝浠ユ澶栬竟绾夸负鍒嗙晫绾裤傚澧欒竟绾夸互澶栨垨姊佸杈圭嚎浠ュ鐨勪负鎸戞獝澶╂矡銆傛寫妾愪綔鐢ㄦ槸閬垮厤灞嬮潰鐨勯洦姘村悜涓嬫帓鏀炬椂娴囧埌澧欓潰涓娿傛寜闆ㄦ按鎺掓斁鐨勬柟寮忓垎涓烘湁缁勭粐鎺掓按鍜屾棤缁勭粐鎺掓按涓ょ銆傛湁缁勭粐鎺掓按鏂瑰紡鐨勬寫妾愬舰鎴澶╂矡锛鏃犵粍缁囨帓姘寸殑鎸戞獝...
绛旓細鏍规嵁灞嬮《闈㈢Н绛夌畻銆傚啘鏉戞埧瀛愭媶杩佹埧瀛愪笂灞嬮潰鐨勭悏鐠冪摝澶╂矡鍙互杩欐牱绠楋細澶╂矡鏄綅浜庡眿椤朵袱渚х殑姘存Ы锛屽洜姝ら渶瑕佸厛璁$畻灞嬮《鐨勯潰绉紝鍐嶇畻灞嬮《鐨勫潯搴锛屽ぉ娌鐨勫搴︺佹繁搴︺侀暱搴︼紝鏈鍚庡氨鍙互寰楀嚭鍏蜂綋鐨勭悏鐠冪摝澶╂矡闈㈢Н銆傜悏鐠冪摝澶╂矡鏄寚鍦ㄦ埧灞嬪眿闈袱渚ф垨鍥涘懆鐨勫嚬妲戒腑锛岀敤浜庢敹闆嗗苟鎺掗櫎闆ㄦ按鐨勫缓绛戞瀯浠讹紝澶╂矡涓鑸敱姘存Ы銆佺珫绠°...
绛旓細涓鑸彲浠ョ敤澶╂矡鎬婚暱(mm)x鎴潰灞曞紑(mm)x 鍘氬害(mm)x 7.85 /1000000 澶╂矡閲嶉噺锛圱锛=澶╂矡鎬婚暱(mm)x鎴潰灞曞紑(mm)x 鍘氬害(mm)x 7.85 /1000000
绛旓細闆嗚仛闆ㄦ按鐨勬矡灏辫绉颁负澶╂矡锛屽ぉ娌鍒嗗唴澶╂矡鍜屽澶╂矡锛屽唴澶╂矡鏄寚鍦ㄥ澧欎互鍐呯殑澶╂矡锛屼竴鑸湁濂冲効澧欙紱澶栧ぉ娌熸槸鎸戝嚭澶栧鐨勫ぉ娌燂紝涓鑸病濂冲効澧欍傚ぉ娌熷鐢ㄧ櫧閾佺毊鎴栫煶妫夋按娉ュ埗鎴愩傚湪寤虹瓚涓婏紝澶╂矡鐨勫伐绋嬮噺鎸夎璁″昂瀵镐互浣撶Н璁$畻锛涓嶆墸闄ゆ瀯浠跺唴閽㈢瓔鍙婇鍩嬮搧浠朵綋绉濡傚浘鎵绀猴細...
绛旓細澶╂矡澶氱敤鐧介搧鐨垨鐭虫姘存偿鍒舵垚銆傚湪寤虹瓚涓婏紝澶╂矡鐨勫伐绋嬮噺鎸夎璁″昂瀵镐互浣撶Н璁$畻锛涓嶆墸闄ゆ瀯浠跺唴閽㈢瓔鍙婇鍩嬮搧浠朵綋绉傛獝娌熸槸浠涔堟獝娌熸槸灞嬫獝涓嬮潰妯悜鐨勬Ы褰㈡帓姘存矡锛岀敤浜庢壙鎺ュ眿闈㈢殑闆ㄦ按锛岀劧鍚庣敱绔栫寮曞埌鍦伴潰銆傛獝娌熷垎涓哄妾愭矡鍜屽唴妾愭矡锛屼竴鑸笉鑳借绠楀缓绛戦潰绉紝鍙牴鎹皵璞¤祫鏂欙紝闄嶆按寮哄害浠ュ強鎺掓按閫熷害纭畾娌熺殑灏哄澶у皬...
绛旓細璁$畻杞婚挗闆ㄦ閽㈡澘澶╂矡宸ョ▼閲忔柟娉曞涓嬶細閽㈤洦妫氶挗鏉垮ぉ娌燂紙涓嶉攬閽㈠ぉ娌燂級宸ョ▼閲忚绠楋細瀹為檯闀垮害*灞曞紑瀹藉害*璇ヨ鏍肩殑鐞嗚閲嶉噺 锛堥挗鏉跨悊璁洪噸閲忥紳7.85*t锛夊娉細1銆佸ぉ娌熶袱涓澶寸殑灏佸ご鏉挎寜閽㈡澘闈㈢Н*鐞嗚閲嶉噺璁$畻锛宸ョ▼閲忓苟鍏ラ挗锛堜笉閿堥挗锛夋澘澶╂矡鍐咃紱2銆佹婚噸锛氬崟鏉″ぉ娌熼噸閲*澶╂矡鏉℃暟锛堝弬鐓ч洦绡风粨鏋勫浘锛夈傜浉鍏冲唴瀹癸細...
绛旓細澶╂矡銆佹獝娌熴侀洦妫氱殑鍖哄埆锛氶洦绡凤細鏄缓绛戠墿鍏ュ彛澶勯伄闆紝淇濇姢澶栭棬鍏嶅彈闆ㄦ穻鐨勬按骞虫瀯浠舵寫妾愶細鏄缓绛戠墿灞嬮潰澶勶紝浠ラ槻灞嬮潰闆ㄦ按椤哄澧欓潰婕祦鑰屾薄鏌撳闈紟妾愭矡鍜屽ぉ娌熸湰璐ㄦ槸鐩稿悓鐨勯兘鏄帓姘寸敤鐨勶紝鏄庢樉鍖哄埆妾愭矡鏄鎺掓按锛屽ぉ娌鏄唴鎺掓按銆傚彧鏈夊ぉ娌熸槸鍙互鍗曠嫭鍒嗗嚭鏉ョ殑锛屽叾瀹冪殑鏄牴鎹寫鍑洪暱搴︿笉鍚岃屾寜涓嶅悓鐨勬瀯浠璁$畻銆
绛旓細澶╂矡涓鑸槸绠楀欢绫崇殑锛屾埅闈㈢畻灞曞紑褰╂澘瀹藉害灏卞彲浠ヤ簡銆
绛旓細棰樹富鏄惁鎯宠闂滈棬寮忓垰鏋跺澶╂矡閲嶉噺鎬庝箞璁$畻鈥濓紵澶╂矡鐨勭悊璁洪噸閲=浣撶Н*瀵嗗害銆傛牴鎹煡璇㈤棬寮忛挗鏋堕挗缁撴瀯宸ョ▼鍚婅璁$畻璇存槑寰楃煡锛屽ぉ娌熼噸閲忓彲浠ユ寜鐓уぉ娌熺殑鐞嗚閲嶉噺=浣撶Н*瀵嗗害鍏紡鏉璁$畻锛璁$畻绠鍗曞揩鎹枫