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讨论了相框—悬线系统的平衡位形,对于理想的长方形相框模型,悬线长度小于某个极限值时,系统存在两种稳定平衡位形,两个悬线不等平衡位形的重力势能比两个悬线相等平衡位形的重力势能更低.
The equilibrium configuration of the frame-suspension system is discussed. For the ideal rectangular frame model, when the suspension line length is less than a certain limit, there are two kinds of stable equilibrium configuration. The gravity potential of two suspension lines with unequal equilibrium configuration The gravitational potential is lower than the equilibrium shape of two suspended lines.