为研究机组在瞬态载荷作用下的运动规律，建立了大型水轮发电机组瞬态动力响应模型。模型将机组整个轴系的主轴、发电机转子、水轮机转轮及各轴承支承条件耦合起来，考虑了机组轴系的连续质量、转动惯量及摆动惯性。采取有限单元法和直接数值积分法相结合的方法，结合工程实例，对机组在瞬时初位移和瞬时不平衡载荷作用下的时程响应及轴心轨迹分别进行了计算机仿真计算，并对计算结果进行了分析和讨论。此计算模型、计算方法及总结的规律为大型水轮发电机组的振动研究提供了有益的参考。

The self made chemical shrinkage test device was used to research on the chemical shrinkage of three types of usual cement, and the calculation method for ultimately chemical shrinkage of cement value and the prediction model used for chemical shrinkage were proposed. The predicted values of the model coincide well with measured data.