stress matrix
起始应力矩阵 initial stress matrix ; initialstre matrix
叫做应力矩阵 stress-displacement matrix
应力状态矩阵 stress state matrix
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利用自应力矩阵的特性，提出并证明了一种快速识别杆系结构中“必需杆”的方法。
By utilizing the properties of self-stress matrix, a technique for quickly distinguishing "necessary bars" is proposed.
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