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  • 2022-06-17
    试作如题[tex=3.143x1.357]mt/w2zN4YWlTNGrZtjvfVQ==[/tex]图所示刚架的弯矩图， 设各杆[tex=1.214x1.0]aXJNSgwe9sYfky/Vv9M4JQ==[/tex]相局。[img=313x449]179dc7782e94fce.png[/img]
    • 解[tex=1.286x1.357]VAHhaW1te0xvoqDVN54/dg==[/tex]基本未知量:共有[tex=0.5x1.0]8C7DKsr6nhrfCdsmGxO88g==[/tex]个基本未知量[tex=1.5x1.786]Nnok1iVLHS+yG463qLYaGYe6FCPnFExwAluFVgvl/Ms=[/tex][tex=1.286x1.357]BEB68bP4vOVk/XYYizw11w==[/tex]杆端弯矩。杆[tex=1.5x1.0]RlW7nqK9loRKpEZxlhR16g==[/tex]的固端弯矩查表求得[tex=18.286x5.143]5ZHvHMJsp/NWMeuKHU68cnDaWU92ANnKIE7wk/oV1p1gX4XSGPz9JGWZspBlDQg7+dK5jxGvujUiZUXlQG4i48EpHNFbjOEt/QXznALqffBp0+4vHLQg8WKDQrgIA+CHKOQ9AfrP+57oHbQ3WAvEAyQDXOSQUTIJ4L0OO6EHZzw+Ir2XyWVk7TrLyky0OH2Y[/tex]各杆的杆端弯矩表达式为[tex=20.071x10.071]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[/tex][tex=12.714x6.286]9/fj8rht+7A3Mp+cAS1wrs98Ghqvpb4SQI+X+Je/W+Tag2+2S8vLGcG1pk2vpi2/s/Ns41LaWcsu2VvPMus0ADCM8qcvP+833X0H4i432l2LhPrSXrAQqaLiwAZKps9SrVqOPZxD13NXpqqhhynVtb8c4oh1QwEuHA8Yr6NczMJjf2zyG1xSK9KzvTKF6ZHMpz1b8QrRQVti/ZhGzFy+YQ==[/tex][tex=1.286x1.357]H6tHfFjOZ3ZWdB4qPQ9Ocg==[/tex]列位移法方程。[tex=10.5x2.786]7EJHVCtO2IWq3KpdB+jQsq4ukPMjg3bNzSgFB4pj1lq4XKIHIpXTLOyEVs6+C62t88HeYg3ZBKEn6wbojoZWURP7o2zvS4RNJpy7s/h8nwmfz8NezSn8DycXxC7AYwyI[/tex]将相关的杆端弯矩代人得[tex=10.643x5.357]7EJHVCtO2IWq3KpdB+jQspVNyJ1e0oCL7gm75ziVzGWicy8KFkw1Uhw8Y2FeF4L2J8Hl39aatgvgxhdLMu/00Fn4OSRaOjU0iIVOtBr6YEYJ0i/ZtYMQlh38nuR0PEAdwmwpDj+3PHfbm2E+B9UH+aeZIz9i1xK08UiqpnGAHa3dHq6RYvDPX+esVMfHreRjvWU95gAsN2R5nw7fWvt5yVEVGl+POnrDIurLnmRZwKY=[/tex](4)求基本未知量。解以上方程组得[tex=10.429x2.429]CzrPB7uVC2g23ubvAfuwEJXj50msXw5FMlN+UxM7kTts9ai4fkjovlDDB2iLYyChMUyvMKT80i48NwgUpzEw30pULSK/smcJreryb2k2gSU=[/tex][tex=1.286x1.357]VHgv8yVrrSZwLqu1l6FPnQ==[/tex]求杆端弯矩。将求得的位移代人杆端弯矩表达式,得[tex=17.357x5.214]73bXXpd6F5x0kb3kCXPiR8d2/GuPrGqH7zm7WS3nwVHmeGUOyBjK/5q0/AX628km1Uf95sbL4g4ZOOUv//qzTffVvVWFCJZI/mfV+YdZmzoJ4HZWdFMPQkDC+7sqfpAl3Wp0xKD1ZS4tnb6kqbRhp0QWB2uy/eYr62gZWQwX79Stu7x4W7nmdOdfLh1bknZp9QhPBbDPX8YtMJ84IwhVw9e2v5nAtJ4PAedIRJ1Wty9AMo1AOps3HOcf3OVXidXqTBBkaiVnBcRE3cTgtlgUHUzlyAokn9AwPxmxWA/XNeSQCPB0sWjSonmTrTMB7Ymj[/tex][tex=1.286x1.357]gfNg2L7OjFhF/G4XiUhPGA==[/tex]作弯矩图(题[tex=3.0x1.357]2tA4WaYywBYfweCTw3dSmQ==[/tex]图)。
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    • 0

      用位移法计算如图6-9a所示结构，作弯矩图。各杆[tex=1.214x1.0]aXJNSgwe9sYfky/Vv9M4JQ==[/tex]常数。[img=385x300]179ec07ab0ede4d.png[/img]

    • 1

      试作 如题[tex=3.143x1.357]0t+AUOmEd9r/k372Y1OLEA==[/tex]图所示刚架的[tex=6.429x1.286]4V0hRAkImz2lJdke4kiTVeG+Oyh4gqd02ma8+HqAsFM=[/tex]图。[img=401x410]179dc810e5152e7.png[/img][img=371x345]179dc813e535f30.png[/img]

    • 2

      图[tex=0.5x1.0]+ElP8Glp1jNyDFWBiVUf/g==[/tex]所示刚架，[tex=1.214x1.0]aXJNSgwe9sYfky/Vv9M4JQ==[/tex]为常数，各杆长度为[tex=0.357x1.0]5vVfAZliYwqMw8JaLE+iEA==[/tex]，则[tex=0.357x1.0]5vVfAZliYwqMw8JaLE+iEA==[/tex]点的竖向位移为。[img=171x148]179ccce8d62902e.png[/img]

    • 3

      图[tex=3.071x1.286]0lNsI6Yjqyg2JAEzZLZipqueOIxgUEAaU/2zdRDjS8Q=[/tex]所示刚架，[tex=1.214x1.0]aXJNSgwe9sYfky/Vv9M4JQ==[/tex]为常数，各杆长为[tex=0.357x1.0]5vVfAZliYwqMw8JaLE+iEA==[/tex]，不计轴向变形，试绘弯矩图。[img=657x198]179c7023a7c2626.png[/img]相关力学基本概念:计算简图的确定，对称性的利用。

    • 4

      设图示各梁的[tex=1.214x1.0]aXJNSgwe9sYfky/Vv9M4JQ==[/tex]已知,试求各支座约束力并作弯矩图。[img=291x158]17d8fbbec7711fe.png[/img]