| 摘要 |
PROBLEM TO BE SOLVED: To increase the speed and accuracy of an analysis of development of damage such as crack or separation by a new element breakdown method. SOLUTION: A point (Fig. 4(a)) on a boundary line is divided as a nodal point by a Deloney triangle division method (Fig. 4(b)), and circles without crossing one another are arranged in a target region 20 by a Monte Carlo method, a Lawson exploration method and a predetermined function (Fig. 4(c)). Six circles having the smallest distances to one circle are identified by the Monte Carlo method, the central coordinates of the one circle are tentatively moved, and when the degree of dispersionΦof the distances to the one circle is lowered, the central coordinates after the movement is employed (Fig. 4(d)). The center of the circle and the point on the boundary line are divided as nodal points by a Deloney triangle division method (Fig. 4(e)). The coordinates of a nodal point extracted by the Monte Carlo method are tentatively moved, and when the total of non-regular triangle levels DTR of all the triangles using the extracted nodal point as apexes is lowered, the nodal coordinates after the movement are employed and divided by the Deloney triangle division method (Fig. 4(f)). COPYRIGHT: (C)2008,JPO&INPIT
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