图示结构,汇交于结点A各杆端的力矩分配系数为:()
A: ,,
B: ,,
C: ,,
D: ,
A: ,,
B: ,,
C: ,,
D: ,
举一反三
- 图示结构中B结点的不平衡力矩(约束力矩)为:()<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/88c7b2d7d28442138ce55089cf7b9336.png"> A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/47d0574ad121412e9d4157cfefdbe4e2.png"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/44cf62aafb4448249c125acf30fafc34.png"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/c03f18530c2449adb6c23d46c25bcb46.png"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/a75bc93c9f754579b24d7dc9c1705930.png">
- 下列结论错误的是() A: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/4a3d4acefd7f4477a8e87e2ae428b31a.png">处连续,则<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/091d1b1af4704a85b8293d2fd567adbf.png">处可导. B: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6a503657edf44fb88c8b115537832ae.png">处不连续,则<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/091d1b1af4704a85b8293d2fd567adbf.png">处不可导. C: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6a503657edf44fb88c8b115537832ae.png">处可导,则<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/091d1b1af4704a85b8293d2fd567adbf.png">处连续. D: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6a503657edf44fb88c8b115537832ae.png">处不可导,则<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6523f26b0ca417294d239696ec45367.png">在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/091d1b1af4704a85b8293d2fd567adbf.png">处也可能连续.
- 图示结构用矩阵位法求解时,等效结点荷载列阵为:()<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/97ca40c3ee6b4d67a2506e645b72a36e.png"> A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/e86f0ab977d94e67aabeb21f165ac815.png"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/02fd4eb6cde249668ff035aa6f433ae5.png"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/bb9ecf1cf72541419a4811205bdbed29.png"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/d4eb9af1d0b744a388f1aa794e44f2d5.png">
- 下列关于极值命题中正确的是() A: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/66e36e20da3f43e9bbd9ce0f42dcbe28.png">,则<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/9d60dd3351b54052b4f4afe27423a0e7.png">必是<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/53f1ecb5821b44f1a56bbc836e49d9b7.png">的极值点 B: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/0a40a2ad34e649e3b999f776e8fe1919.png">,则<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/9d60dd3351b54052b4f4afe27423a0e7.png">必是<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/53f1ecb5821b44f1a56bbc836e49d9b7.png">的极值点 C: 极大值一定大于极小值 D: 若<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/31b1a07ab57347febde3751859364dfb.png">存在且<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/9d60dd3351b54052b4f4afe27423a0e7.png">是极值点,则必有<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/66e36e20da3f43e9bbd9ce0f42dcbe28.png">
- 图示刚架,结点A承受力偶作用,EI=常数。用力矩分配法求得AB杆B端的弯矩是:()<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/7f7f4973567d4fe1bba22dcfda90576b.png"> A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/924668c9b6164abf9ce5f8408ce20881.png"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/7138e815e3484afc811e172c08c9c5ed.png"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/e69f09485ad04e40851c731afb2381a2.png"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/33f68a0494134087b303dd17cfaca7b1.png">