| In the paper, the elastic contact thermal stress of super-pressure stillage body iri theshoot simulating device is carried out by the mixed-method of finite element. The mathemat-ics model used can make lots of convergent process in calculating contact forces concentrateon a few screwthread contact points, which may avoid the initial eouation to be formed andsolved many times and greatly increase the calculating speed.Also, the virtual-springs maybe used to solve the singular problem of giobal stiffness matrix. |