汽轮机技术
汽輪機技術
기륜궤기술
TURBINE TECHNOLOGY
2014年
1期
9-12,17
,共5页
弯曲振动%旋转软化%应力刚化%陀螺力矩%正%反进动模态
彎麯振動%鏇轉軟化%應力剛化%陀螺力矩%正%反進動模態
만곡진동%선전연화%응력강화%타라력구%정%반진동모태
bending vibration%spin softening%stress stiffening%gyroscopic moment%forward and backward whirl components
利用有限元法，分别建立了梁及实体转子模型，研究弯曲振动特性。考虑转动惯性、陀螺力矩、应力刚化及旋转软化效应，导出了相应的动力学方程。开发程序计算了转子的正、反进动频率、临界转速等。计算表明：旋转软化效应显著影响了转子弯曲的反进动模态，应力刚化则进一步影响了正进动模态。不同弯曲振动模态受到的影响不同，具有非线性特性。与梁模型相比，采用实体模型计算转子的弯曲振动，仿真度高，便于准确求解，同时也拓宽了转子动力学分析范围。
利用有限元法，分彆建立瞭樑及實體轉子模型，研究彎麯振動特性。攷慮轉動慣性、陀螺力矩、應力剛化及鏇轉軟化效應，導齣瞭相應的動力學方程。開髮程序計算瞭轉子的正、反進動頻率、臨界轉速等。計算錶明：鏇轉軟化效應顯著影響瞭轉子彎麯的反進動模態，應力剛化則進一步影響瞭正進動模態。不同彎麯振動模態受到的影響不同，具有非線性特性。與樑模型相比，採用實體模型計算轉子的彎麯振動，倣真度高，便于準確求解，同時也拓寬瞭轉子動力學分析範圍。
이용유한원법，분별건립료량급실체전자모형，연구만곡진동특성。고필전동관성、타라력구、응력강화급선전연화효응，도출료상응적동역학방정。개발정서계산료전자적정、반진동빈솔、림계전속등。계산표명：선전연화효응현저영향료전자만곡적반진동모태，응력강화칙진일보영향료정진동모태。불동만곡진동모태수도적영향불동，구유비선성특성。여량모형상비，채용실체모형계산전자적만곡진동，방진도고，편우준학구해，동시야탁관료전자동역학분석범위。
The finite element models of the beam and solid rotor dynamics are established respectively for the bending vibtation analysis.The dynamic equations for the rotor are deduced from the effects of rotating inertia ,gyroscopic moments , stress stiffening and spin softening .The computer program is developed to determine the forward and backward whirl components,critical speeds.Calculations show that the spin softening effect has significant influence on the backward whirl modes and the stress stiffening effect strongly on the forward whirl modes .There is a big difference between the bending modes of different affected degree ,and the nonlinear characteristics are represented by the effects .The results is applied to the critical speeds .The accuracy of the solid model and the solution techniques have been demonstrated by comparison with results of the beam model ,explaining that the range of study on solid model rotor dynamics can be expand .
