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宸ュ瓧閶�
鎴潰瀵害 B
鑵规澘鍘氬害 Tw
缈肩罚鍘氬害 Tf
浜ゆ帴鍦撳姬鍗婂緫 Rw
RA=RB=P/2
Mc=Mmax=Pl/4
fc=fmax=Pl^3/48EI
胃A=胃B=Pl^2/16EI
绗﹁櫉鎰忕京鍙婂柈浣�
P -- 闆嗕腑杓夎嵎锛孨;
q -- 鍧囧竷杓夎嵎锛孨;
R -- 鏀骇鍙嶅姏锛屼綔鐢ㄦ柟鍚戝悜涓婅€呯偤姝ｏ紝N;
M -- 褰庣煩锛屼娇鎴潰涓婇儴鍙楀锛屼笅閮ㄥ彈鎷夎€呯偤姝�锛孨m;
Q -- 鍓姏锛屽皪閯拌繎鎴潰鎵€鐢�(ch菐n)鐢熺殑鍔涚煩娌块爢鏅傞嚌鏂瑰悜鑰呯偤姝ｏ紝N;
f -- 鎾撳害锛屽悜涓嬭畩浣嶈€呯偤姝ｏ紝mm;
胃 -- 杞�(zhu菐n)瑙�锛岄爢鏅傞嚌鏂瑰悜鏃嬭綁(zhu菐n)鑰呯偤姝ｏ紝掳;
E -- 褰堟€фā閲�锛孏pa;
I -- 鎴潰鐨勮桓鎱ｆ€х煩锛宮^4;
尉=x/l锛屛�=x'/l锛屛�=a/l锛屛�=b/l锛屛�=c/l
寰炲叐鏂归潰鑰冩叜:
锛屽緸姊佺殑鍓垏鎳�(y墨ng)鍔涜€冩叜
绗簩锛屽緸褰庢洸姝ｆ噳(y墨ng)鍔涜€冩叜銆�
寰炲瀷閶艰〃涓彲浠ユ煡鍒板畠鐨勫ぇ鍙敤鍓垏寮峰害T
Tmax=Q/Ib[BH^2/8-<(B-b)h^2>/8]
寮忎腑: Tmax鐐哄ぇ鍓垏寮峰害銆傛妸鍙敤鍓垏寮峰害T浠ｉ€插幓锛屽彲绠楀嚭姊佺殑澶ф壙鍙楄級鑽�銆�
Q鐐哄潎甯冭級鑽�
I鐐哄伐瀛楅嫾鐨勬埅闈㈡叄鐭╁彲鍦ㄥ瀷閶艰〃涓煡寰�(cm^4).
B鐐哄伐瀛楅嫾鎴潰鐨勫ぇ瀵害銆�
b鐐哄伐瀛楅嫾鎴潰鐨勫皬瀵害
h鐐哄伐瀛楅嫾灏忓搴︽埅闈㈢殑楂樺害銆�
H鐐哄伐瀛楅嫾澶у搴︽埅闈㈢殑楂樺害
姝ｆ噳(y墨ng)鍔涚殑瑷堢畻:
Ysigma=M/W
M=澶у綆鐭�=杓夎嵎涔樿窛闆�
W=鎶楀綆妯￠噺銆�
瑷�(sh猫)Ysigma=鍏佽ū鐨勫ぇ鎳�(y墨ng)鍔�锛屽彲寰楀嚭杓夎嵎鐨勫ぇ鍊�銆�
鏅€氬伐瀛楅嫾瑕�(gu墨)鏍艰〃
W= 0.00785 脳[hd+2t ( b 鈥� d ) +0.615 ( R 2 鈥� r 2 ) ]
h= 楂�
b= 鑵块暦
d= 鑵板帤
t= 骞冲潎鑵垮帤
R= 鍏�(n猫i)寮у崐寰�
r= 绔姬鍗婂緫
姹� 250 mm 脳 118mm 脳 10mm 鐨勫伐瀛楅嫾姣� m 閲嶉噺銆傚緸閲戝爆鏉愭枡鎵嬪唺涓煡鍑鸿┎宸ュ瓧閶� t 鐐� 13 锛� R 鐐� 10 锛� r 鐐� 5 锛屽墖姣� m 閲嶉噺 = 0.00785 脳[250 脳10+2 脳13 脳 ( 118 鈥�10 ) +0.615 脳 ( 10 2 鈥�5 2 ) ]= 41.91kg
30鐗瑰伐瀛楅嫾 鍙堢ū30鐣板伐瀛楅嫾 鎴�30t
宸ュ瓧閶�30鐗规槸灏堢偤钁槅寮忚捣閲嶆瑷�(sh猫)瑷堢殑宸ュ瓧閶硷紝涓嬬考绶ｅ姞鍘�锛屼究浜庤懌铇嗚窇杌婂湪涓婇亱琛�
