几何非线性中格林应变采用增量的形式和绝对坐标形式的区别？
对悬臂梁进行几何非线性分析，非线性的格林应变采用增量的形式data:image/png;base64,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时，计算的结果是正确的，当采用绝对坐标的形式data:image/png;base64,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时，则计算的结果不对。不知为什么？有高人帮忙指点一下。本帖最后由 zchunhua3120 于 2017-3-23 16:52 编辑
对悬臂梁进行几何非线性分析，非线性的格林应变采用增量的形式时，结果是对的，当采用绝对坐标的形式时，结果却不对，为什么呢？
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