均布荷载问题简支梁受均布荷载作用,如图示,作此梁的剪力图和弯矩图.1.求约束反力由对称关系,可得:RA=RB=1/2ql(向上)V(x)=RA-qx=1/2ql-qx M(x)=RAx-1/2qx² (想问下这里-1/2qx²怎么产生
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![均布荷载问题简支梁受均布荷载作用,如图示,作此梁的剪力图和弯矩图.1.求约束反力由对称关系,可得:RA=RB=1/2ql(向上)V(x)=RA-qx=1/2ql-qx M(x)=RAx-1/2qx² (想问下这里-1/2qx²怎么产生](/uploads/image/z/3251134-46-4.jpg?t=%E5%9D%87%E5%B8%83%E8%8D%B7%E8%BD%BD%E9%97%AE%E9%A2%98%E7%AE%80%E6%94%AF%E6%A2%81%E5%8F%97%E5%9D%87%E5%B8%83%E8%8D%B7%E8%BD%BD%E4%BD%9C%E7%94%A8%2C%E5%A6%82%E5%9B%BE%E7%A4%BA%2C%E4%BD%9C%E6%AD%A4%E6%A2%81%E7%9A%84%E5%89%AA%E5%8A%9B%E5%9B%BE%E5%92%8C%E5%BC%AF%E7%9F%A9%E5%9B%BE.1.%E6%B1%82%E7%BA%A6%E6%9D%9F%E5%8F%8D%E5%8A%9B%E7%94%B1%E5%AF%B9%E7%A7%B0%E5%85%B3%E7%B3%BB%2C%E5%8F%AF%E5%BE%97%EF%BC%9ARA%3DRB%3D1%2F2ql%28%E5%90%91%E4%B8%8A%EF%BC%89V%28x%29%3DRA-qx%3D1%2F2ql-qx+++++++M%28x%EF%BC%89%3DRAx-1%2F2qx%26%23178%3B++++%EF%BC%88%E6%83%B3%E9%97%AE%E4%B8%8B%E8%BF%99%E9%87%8C-1%2F2qx%26%23178%3B%E6%80%8E%E4%B9%88%E4%BA%A7%E7%94%9F)
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