A
E
C
M
杞村悜鎷変几涓庡帇缂╀範棰樺強瑙ｇ瓟
璁＄畻棰?/p>
1
锛?/p>
鍒╃敤鎴潰娉曪紝姹傚浘
2. 1
鎵�绀虹畝鏀
m
鈥?/p>
m
闈㈢殑鍐呭姏鍒嗛噺銆?/p>
瑙ｏ細
锛?/p>
1
锛夊皢澶栧姏
F
鍒嗚В涓轰袱涓垎閲忥紝鍨傜洿浜庢杞寸嚎鐨勫垎閲?/p>
F
sin
飦?/p>
,
娌挎杞寸嚎鐨勫垎閲?/p>
F
cos
飦?/p>
.
(2)
姹傛敮搴?/p>
A
鐨勭害鏉熷弽鍔涳細
x
F
飪?/p>
=0
锛?
Ax
F
飪?/p>
=
cos
F
飦?/p>
B
M
飪?/p>
=0,
Ay
F
L=
sin
3
L
F
飦?
Ay
F
=
sin
3
F
飦?/p>
(3)
鍒囧紑
m
鈥?/p>
m
锛屾姏鍘诲彸鍗婇儴鍒嗭紝鍙冲崐閮ㄥ垎瀵瑰乏鍗婇儴鍒嗙殑浣滅敤鍔?/p>
N
F
锛?/p>
S
F
鍚堝姏鍋?/p>
M
浠ｆ浛
锛堝浘
锛?/p>
銆?/p>
鍥?/p>
鍥?/p>
(a)
浠ュ乏鍗婃涓虹爺绌跺璞★紝鐢卞钩琛℃潯浠跺彲浠ュ緱鍒?/p>
x
F
飪?/p>
=0
锛?/p>
N
F
=
鈥?/p>
Ax
F
=
鈥?/p>
cos
F
飦?/p>
锛堣礋鍙疯〃绀轰笌鍋囪鏂瑰悜鐩稿弽锛?/p>
y
F
飪?/p>
=0
锛?/p>
s
F
=
Ay
F
=
sin
3
F
飦?/p>
宸﹀崐娈垫墍鏈夊姏瀵规埅闈?/p>
m-m
寰峰舰蹇?/p>
C
鐨勫悎鍔涜窛涓洪浂
sin
飦?
C
M
飪?/p>
=0
锛?/p>
M=
Ay
F
2
L
=
6
FL
sin
飦?/p>
璁ㄨ
瀵瑰钩闈㈤棶棰橈紝
鏉嗕欢鎴潰涓婄殑鍐呭姏鍒嗛噺鍙湁涓変釜锛?/p>
鍜屾埅闈㈠娉曠嚎閲嶅悎鐨勫唴鍔涚О涓鸿酱鍔涳紝
鐭㈤噺涓庡娉曠嚎鍨傜洿鐨勫姏鍋惰窛绉颁负寮煩銆?/p>
杩欎簺鍐呭姏鍒嗛噺鏍规嵁鎴潰娉曞緢瀹规槗姹傚緱銆?/p>
鍦ㄦ潗鏂欏姏瀛﹁
绋嬩腑涓昏璁ㄨ骞抽潰闂銆?/p>
璁＄畻棰?/p>
2
锛?/p>
璇曟眰棰?/p>
2-2
鍥炬墍绀虹殑鍚勬潌
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>
2L/3
m
m
F
y
D
L
x
F
Ay