Robust equilibrium design method for dynamic characteristics of generator stator end fixing structure
A technology with fixed structure and dynamic characteristics, which is applied in the field of robust and balanced design of the dynamic characteristics of the fixed structure at the stator end of the generator, and can solve problems such as dynamic characteristic index fluctuations
Active Publication Date: 2020-06-12
ZHEJIANG UNIV
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[0003] On the other hand, due to heat treatment and machining errors, there are uncertainties in the material properties of the fixed structure of the turbogenerator stator end, and these uncertainties will cause certain fluctuations in its dynamic characteristic indicators
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[0058] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0059] Using the robust and balanced design method for the dynamic characteristics of the fixed structure of the generator stator end proposed by the present invention, the anti-vibration design is carried out for the fixed structure of the stator end of a certain type of nuclear power four-pole turbogenerator, as shown in figure 1 As shown, the specific steps are as follows:
[0060] 1) Establish a robust equilibrium design model for the dynamic characteristics of the fixed structure at the generator stator end: figure 2 The fixed structure of the cone ring at the stator end of the generator shown in the design object is taken as h in the section of the fixed structure of the stator end cone ring 1 、h 2 , l as design variables, considering the uncertainty of elastic modulus E and density ρ of the fixed structure material at the st...
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The invention discloses a robust equilibrium design method for dynamic characteristics of a generator stator end fixing structure. The method comprises the following steps: establishing a robust equilibrium design model for the dynamic characteristics of the generator stator end fixing structure; sampling the design variables and the uncertain parameters by adopting a Latin hypercube sampling method, obtaining sample points through a co-simulation technology, and establishing a Kriging model of each dynamic characteristic index value of a stator end fixed structure in a prediction target and aconstraint function; and performing iterative optimization by using a double-layer nested genetic algorithm based on an interval angle overlap ratio coefficient and an overall performance robust equilibrium index to obtain an optimal design scheme of the dynamic characteristics of the stator end fixed structure. According to the method, the interval angle coincidence degree coefficient is introduced, and the generator stator end fixing structure design scheme enabling all dynamic characteristic indexes to be stable and balanced can be flexibly and conveniently obtained according to the robustness requirements needing to be met by the stator end fixing structure under different working conditions.
Description
technical field [0001] The invention belongs to the field of mechanical structure design, and in particular relates to a robust and balanced design method for dynamic characteristics of a fixed structure at a generator stator end. Background technique [0002] During the working process of the turbogenerator, when the natural frequency of the fixed structure at the stator end of the generator is close to the electromagnetic force excitation frequency or a multiple of the excitation frequency, resonance or high-frequency resonance will occur in the fixed structure at the stator end. Various faulty operating conditions such as short circuit and reclosing will inevitably occur during the operation of the turbogenerator. Under fault conditions, the maximum current of the stator winding of the generator will be several times or even more than 10 times that of normal operation, and the amplitude of the stator end winding and its fixed structure under the action of electromagnetic ...
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Login to View More IPC IPC(8): G06F30/17G06F30/20G06N3/12G06F111/10
CPCG06N3/126
Inventor 程锦王荣钱炀明胡伟飞刘振宇
Owner ZHEJIANG UNIV