图 [tex=2.286x1.143]CSham/vPIP0iNbtoEXmen+wgEPesQ3V6WpoACfeAWJE=[/tex] 所示的刚架自重不计。已知 [tex=14.571x1.571]0QSXQtXu19o7WkYPQgZWBqgZbtBOxnZbWawClR15Q3VRTSyoLb5ixxaCbfFKrase0OfKjV+Ew1BBfp5Os2vKxsQF15Kw86r0yJZgDqq1yMAEtqPFD7hmDJZNf+2zaWJl[/tex], [tex=2.0x1.214]Jup0ChK5Oj/wyQ52yLmQHQ==[/tex] 为光滑铰链。试求支座 [tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex] 的约束力。[img=979x521]179d239df1f30e4.png[/img]

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2022-06-06

图 [tex=2.286x1.143]CSham/vPIP0iNbtoEXmen+wgEPesQ3V6WpoACfeAWJE=[/tex] 所示的刚架自重不计。已知 [tex=14.571x1.571]0QSXQtXu19o7WkYPQgZWBqgZbtBOxnZbWawClR15Q3VRTSyoLb5ixxaCbfFKrase0OfKjV+Ew1BBfp5Os2vKxsQF15Kw86r0yJZgDqq1yMAEtqPFD7hmDJZNf+2zaWJl[/tex], [tex=2.0x1.214]Jup0ChK5Oj/wyQ52yLmQHQ==[/tex] 为光滑铰链。试求支座 [tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex] 的约束力。[img=979x521]179d239df1f30e4.png[/img]

答案：

[tex=1.357x1.0]7MCrY382EsVHxVweB/6LVw==[/tex]为二力杆，受力如图 [tex=2.357x1.143]eJN7k+Pqq4j3HBVCkuPycA==[/tex] 所示。取 [tex=1.571x1.0]iW5Ht7EzAojfQ+hbsC5yyQ==[/tex] 杆为研究对象，受力如图 [tex=2.286x1.143]+lh4MkK4XsUBmTyCl0louw==[/tex] 所示。解得[tex=19.571x3.643]rZM5/OPAdr7aX+kNl9iwpEZ8yzldWJfVrJi4624Qr2gpHyOIGLOEO+XIgz5GtRIiYi9OxFnfMIhwMOb1VHY4rFfxeu7YVM4mIDNoPXM9VMIkYMXYp1sJlepfi27DRNaq38OC5aAMpsxsHtV+7tQgqkkypXc0jU7Iajxbl/UH5X2Rg8Q3XzOVEJzQL5eyD2MV[/tex][tex=17.071x2.0]dEiM6sjh4I/dLjwFlRQR6yaN792BMVZPhSstvnxJRz3eIpQxJ5u7hpYAsT/3mu6TvtL8xfHthG0fbZIPzpIzV4QSM228iTpqxMnE5nJrl0+4UiiRmy6W5vbYUM1+YRzK[/tex]解得 [tex=15.929x1.429]KBM1+x8CoUUXDH3A9lnQKivNVxpY0SOfe+b0mVdnOOv7N1oiezaarHu/zIWUU/jNYoC48NBbKEK49+EV7B1NHSJItkGsFsaiXzyMrd9eKG+tDAeT/7lkULK3Du3fq7OMM/PDtLJEaxiAwDvP/bslUXOGghpPQ+xTeGC7qKUAwEU=[/tex]

举一反三

内容

0
set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为？ A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
1
假设个体域D={1, 2, 3, 4, 5, 6}，P(x)：x是偶数，Q(x)：x＞0 ，R(x)：x＞6则[img=60x22]17e446cee76fe2e.png[/img]的真值为1;
2
【单选题】设X为连续型随机变量, 其概率密度: f(x)=Ax2, x∈(0,2); 其它为0. 求(1)A=(); (2) 分布函数F(x)=(); (3) P{1<X<2} (10.0分) A. （1）3/8；（2）x<0, F(x)=0; 0≤x<2, F(x)=1/8x³; x≥2, F(x)=1; （3） 7/8 B. （1）5/8；（2）x<0, F(x)=0; 0≤x<2, F(x)=1/8x³; x≥2, F(x)=0 （3） 1/8
3
>>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
4
【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]