The determination of freedom less than the actual one may be find implicit constraint properly on the basic of the given one in using the virtual work principle to solve the problems.
由虚功原理解题时可在题中给定约束的基础上，适当考虑隐含约束，确定比实际少的自由度。
The determination of freedom less than the actual one may be find implicit constraint properly on the basic of the given one in using the virtual work principle to solve the problems.
由虚功原理解题时可在题中给定约束的基础上，适当考虑隐含约束，确定比实际少的自由度。
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