S.A. Pimenov

For a wide range of constructions it is difficult to get an analytic form of relation between stress parameters Q and strength R. In such cases the common way is to apply numerical methods. It is a finite elements method as a rule. Using finite elements method construction is considered as a finite elements model with fixed number of definite characteristics (construction parameters). Each parameter is specified by a statistical array (variational series). Solution is made by iterative calculations of finite elements model with each value of every definite parameter out of its variational series. An easy solving method is a loop with nesting level equals to number of construction parameters (n). Number of construction parameters evidently depends on the construction. So the algorithm needs to be transformed to solve the task for any value of n (i.e. for any construction). Realisation of such algorithm on the computer can be carried out with recursion application. On the basis of this algorithm the special software is constructed. The special software works with NX Nastran.