With the use of classic mechanics, there are too many hypothesis and predigestion in the calculation of complex structures, so the veracity of results is not very good.

采用经典力学计算时，杂构计算中采用假设和简化太多，果准确性相较差。

In order to adapt to real time simulation, the nodes of system and the predigestion was made according to the characteristic of reactor coolant system which will be simulated.

本论文针要仿真剂系统特点，系统进行了节点划分，并做了适当简化，以使其适应实时仿真需要。