1、 , , , , , ; , , , , ; ; ; ; (1987-) , , , , , E-mail: Research on Methods for Powerhouse Turbine Pier Amplitude under Vibration Load Zhang Zhijun Chengdu Engineering Corporation Limited, China Power Construction Corporation; Abstract Magnification of units in hydropower plant leads to increase of t
2、urbine pier size and traditional codes method has not been able to meet the requirements of design and calculation.Finite element method has been popularized greatly, but what kind of finite element method shall be adopted, whether calculation result of finite element method is reasonable or not and
3、 how to evaluate difference between these two methods needs to be solved.Through comprehensive comparison and analysis of codes method and finite element method for turbine pier vertical amplitude in powerhouses, several conclusion is obtained.Calculation result of quasi-static method is larger than
4、 dynamic method and calculation result of dynamic method is larger than codes method.Location of bottom boundary in finite element model has great influence on turbine pier amplitude, so amplitude relative to the reference plane shall be calculated and installation elevation plane should be selected
5、 as reference plane.For finite element method calculation results, its more reasonable to compare amplitude relative to installation elevation plane with allowable limit. Keyword turbine pier amplitude; codes method; quasi-static method; dynamic method; 0 , , ; , , , , , , , , 1, , , , , 2-3 SL 266
6、2014 4 ( ) , 5-6, , , 7 , , 8-9 10, , Ansys , , 1 1 1 Table 1 Load and load combination of turbine pier , , , , 1 , , : 0.15 mm 2 : :A1 , m;P1 , k N, 1 , s, ;w1 , s;G1 i , k N;P0 , k N;Pn , k N;n01 , r/min;n1 , r/min;n2 , r/min; 3 , , 1.5 , , , , , , : (1) 1.3 ; 0.05 (2) (3) 1.5 , , , (4) : , , , ,
7、4 , , 4.1 , , , , 2 2 Table 2 Turbine pier vertical amplitude of schemes 2 , , , 4.2 , 4 1: , , , ; 2: , ; 3: ( ) ; 4: ( ) 4 14 1 1 Fig.1 Model for scheme 1 , 4 , , 3 4 , , 2 2 Fig.2 Model for scheme 2 3 3 Fig.3 Model for scheme 3 4 4 Fig.4 Model for scheme 4 3 Table 3 Turbine pier vertical amplitud
8、e of parts in plants for schemes 4 , ( 4) , , 4 Table 4 Turbine pier vertical amplitude relative to installation elevation plane of parts in plants for schemes 4.3 4 , , , , 5 , , 6 , , , , , 5 Table 5 Turbine pier vertical amplitude of schemes with dynamic method and codes method 6 Table 6 Turbine
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