abaqus出现这一error是怎么回事呢？
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大家好，请问在用abaqus中riks进行非线性分析时出现
error:"A zero displacement solution was found in the first iteration of a riks step. The analysis cannot proceed. The most likely cause is that all displacement degrees-of-freedom are constrained to be zero."
是怎么回事呢
凌云 
