By means of the method of combining optimal calculation with rolling-theory,the mathematic model of 4200 mill s base frame stiffness are studied.
本文采用优化计算和轧制理论相结合的方法，研究４２００轧机机座刚度数学模型，并将设备改造问题的物理模型转变为数学模型。
According to the uncertain problem of elastic support stiffness for complicated space truss in practical projects,which is led by differential settlement of weak foundation,mathematical anti-problem method is proposed,and mathematic analysis models for anti-problem are established.
根据实际工程中存在的软弱地基不均匀沉降造成的空间复杂杆系结构弹性支座刚度的不确定性问题 ,提出了数学反问题方法 ,建立了反问题分析的数学模型 ,并给出数学反问题的解法 ,绘制了计算框图 ,内力分析采用空间杆系有限元法 ,求解方法为迭代法。