To prepare a model for numerical analysis expressing a clearance between a rack guide and a conductor in which it is housed.
A rack guide 30 as a component for energizing a rack bar for wheel steering to a predetermined direction is shaped almost like a cylinder, and a concave whose cross section is shaped like a circular arc is formed at one end. A method for preparing a model for carrying out the numerical analysis of a behavior in the conductor of the rack guide 30 comprises a process for defining nodes with predetermined spacing on the central axis of the rack guide; a process for defining spring elements with non-linear characteristics in the nodes; and a process for setting the spring coefficients of an element S for expressing a clearance C. A plurality of elements S facing to angles made by equalizing a circumference with the node N as a center by predetermined values are prepared from the node N. Then, when the rack guide is cut by planes ξ=a
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Yusuke Murata
Tomoyuki Miki