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本文应用功的互等定理研究了在一个集中弯矩作用下三个角点被支承的三角形板弯曲问题，给出了该问题的精确解．
In this paper, the bending problem of triangular plate supported by three corners under the action of a concentrated moment is studied by the reciprocal theorem of work, and the exact solution of the problem is given.