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.

采用的经典力学计算时，于复杂构的计算中采用的简化太多，果的准确较差。

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.

本论文针要仿真的冷却剂系统的特点，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的需要。