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1
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4
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P
锛屼笌姘撮潰鐨勬懇鎿﹁
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m
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锛屽叾涓婁綔鐢ㄤ竴鍔?/p>
Q
锛屼笖宸茬煡
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=
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銆?/p>
A
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闈炰复鐣屽钩琛?/p>
)
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B
涓寸晫骞宠 鐘舵�?/p>
C
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D
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绗?/p>
1
棰樺浘
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2
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2.
鍥?/p>
(a)
銆?/p>
(b)
涓轰袱绉嶇粨鏋勶紝鍒?/p>
(
)
銆?/p>
A
鍥?/p>
(a)
涓洪潤涓嶅畾鐨勶紝鍥?/p>
(b)
涓轰负闈欏畾鐨?/p>
B
鍥?/p>
(a)
銆?/p>
(b)
鍧囦负闈欎笉瀹氱殑
C
鍥?/p>
(a)
銆?/p>
(b)
鍧囦负闈欏畾鐨?/p>
D
鍥?/p>
(a)
涓洪潤涓嶅畾鐨勶紝鍥?/p>
(b)
涓轰负闈欏畾鐨?/p>
(
浜?/p>
)
濉┖棰?/p>
(
姣忛
3
鍒嗭紝鍏?/p>
12
鍒?/p>
)
1.
娌胯竟闀夸负
m
a
2
飥?/p>
鐨勬鏂瑰舰鍚勮竟鍒嗗埆浣滅敤鏈?/p>
1
F
锛?/p>
2
F
锛?/p>
3
F
锛?/p>
4
F
锛?/p>
涓?/p>
1
F
=
2
F
=
3
F
=
4
F
=
4kN
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璇ュ姏绯诲悜
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涓荤煝澶у皬涓?/p>
R
F
飩?/p>
=____________
锛屼富鐭╁ぇ灏忎负
B
M
=____________
鍚?/p>
D
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____________
銆?/p>
绗?/p>
1
棰樺浘
绗?/p>
2
棰樺浘
2.
鍥剧ず婊氳疆锛屽凡鐭?/p>
2m
R
飥?/p>
锛?/p>
1
m
r
飥?/p>
锛?/p>
飦?/p>
30
飥?/p>
飦?/p>
锛屼綔鐢ㄤ簬
B
鐐圭殑鍔?/p>
4kN
F
飥?/p>
锛屾眰鍔?/p>
F
瀵?/p>
A
鐐?/p>
涔嬬煩
A
M
=____________
銆?/p>
3.
骞抽潰鍔涚郴鍚?/p>
O
鐐圭畝鍖栵紝涓荤煝
R
F
飩?/p>
涓庝富鐭?/p>
O
M
濡傚浘銆傝嫢宸茬煡
10kN
R
F
飩?/p>
飥?/p>
锛?/p>
20kN
m
O
M
飥?/p>
锛屾眰
鍚堝姏澶у皬鍙婁綔鐢ㄧ嚎浣嶇疆锛屽苟鐢诲湪鍥句笂銆?/p>
(a)
(b)
P
Q
o
30
D
C
A
B
F
1
F
2
F
3
F
4
R
r
F
飦?
A
B
O
O
2
O
1
C
A
B
2
O
B
飦?/p>