CAJ | 학술논문

针对汽轮机部分进汽试验台建立三维计算模型，通过有限元方法对不同工况下汽轮机组的振动情况进行数值分析，并通过在基频下实验与模拟结果的比较，验证了数值计算的正确性，同时给出了在倍频上没有出现振动的原因。计算结果表明：不同工况下，转速、进口总压对激振力引起的基频振动都有较强的影响；随着进口总压的上升，机组在基频上的振动将加强，同时也要关注高频激振力引起的高频振动。计算的结果为机组的安全运行提供了有价值的数据。
침대기륜궤부분진기시험태건립삼유계산모형，통과유한원방법대불동공황하기륜궤조적진동정황진행수치분석，병통과재기빈하실험여모의결과적비교，험증료수치계산적정학성，동시급출료재배빈상몰유출현진동적원인。계산결과표명：불동공황하，전속、진구총압대격진력인기적기빈진동도유교강적영향；수착진구총압적상승，궤조재기빈상적진동장가강，동시야요관주고빈격진력인기적고빈진동。계산적결과위궤조적안전운행제공료유개치적수거。
In accordance with the testing apparatus ,establish a three-dimensional calculation model .This paper analyzes the vibration characteristics of steam turbine under different conditions through the finite element method .The correction of the model is achieved through comparing the experimental data with the simulation results in basic frequency .The multiple frequencies do not appear in the simulation and the reason is analyzed .The results show that rotate speed and inlet total pressure have influence on vibration in basic frequency caused by exciting force under different conditions .With the inlet total pressure rising ,the set vibration in basic frequency will be strengthened and high frequency vibration excited by high frequency force should also be focused on .The calculation results provide valuable data for the set ’ s safety running .