绗簩绔?/p>
杞村悜鎷変几鍜屽帇缂?/p>
2-1
璇曟眰鍥剧ず鍚勬潌
1-1
鍜?/p>
2-2
妯埅闈笂鐨勮酱鍔涳紝骞朵綔杞村姏鍥俱�?/p>
锛?/p>
a
锛?/p>
瑙?/p>
锛?/p>
锛?/p>
锛?/p>
锛?/p>
b
锛?/p>
瑙?/p>
锛?/p>
锛?/p>
锛?/p>
锛?/p>
c
锛?/p>
瑙?/p>
锛?/p>
锛?/p>
銆?/p>
(d)
瑙ｏ細
銆?/p>
2-2
涓�鎵撳叆鍦板熀鍐呯殑鏈ㄦ々濡傚浘鎵�绀猴紝娌挎潌杞村崟浣嶉暱搴︾殑鎽╂摝鍔涗负
f=kx
虏锛?/p>
k
涓哄父鏁帮級锛岃瘯浣滄湪妗╃殑
杞村姏鍥俱�?/p>
瑙ｏ細鐢遍鎰忓彲寰楋細
飪?/p>
0
l
Fdx=F,
鏈?/p>
1/3kl
鲁
=F,k=3F/l
鲁
F
N
锛?/p>
x
1
锛?/p>
=
飪?
0
1
x
3Fx
虏
/l
鲁
dx=F(x
1
/l)
鲁
2-3
鐭崇爩妗ュⅸ鐨勫ⅸ韬珮
l=10m
锛屽叾妯埅闈㈤潰灏哄濡傚浘鎵�绀恒�傝嵎杞?/p>
F=1000KN
锛屾潗鏂欑殑瀵嗗害蟻
=2.35
脳
10
鲁
kg/m
鲁锛岃瘯姹傚ⅸ韬簳閮ㄦí鎴潰涓婄殑鍘嬪簲鍔涖�?/p>