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Nuclear power plant equipment anti-seismic performance evaluation method based on floor response spectrum

A technology of anti-seismic performance and nuclear power plants, applied in data processing applications, complex mathematical operations, instruments, etc., can solve problems such as increasing calculation time, and achieve the effects of easy programming, simple implementation, and good promotion

Pending Publication Date: 2019-05-21
CHINERGY CO LTD
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Problems solved by technology

However, reducing the analysis step size often greatly increases the calculation time

Method used

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  • Nuclear power plant equipment anti-seismic performance evaluation method based on floor response spectrum
  • Nuclear power plant equipment anti-seismic performance evaluation method based on floor response spectrum
  • Nuclear power plant equipment anti-seismic performance evaluation method based on floor response spectrum

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Embodiment Construction

[0034] The seismic performance evaluation method of nuclear power plant equipment based on floor response spectrum proposed by the method of the present invention includes the following steps:

[0035] (1) Simplify any piece of equipment in a nuclear power plant into a single degree of freedom damping system, and establish the equation of motion of the equipment as follows:

[0036]

[0037] Where u, They are the displacement, velocity and acceleration of the mass point of the equipment, and ξ is the damping ratio of the set single degree of freedom damping system, including 0.5%, 2%, 3%, 4%, 5%, 7%, 10% in total 7 Damping ratio, ω is the set circular frequency of the single-degree-of-freedom damping system, and its selection must meet the requirements of the frequency interval in the Code for Seismic Design of Nuclear Power Plants, a f Is the acceleration of the floor where the equipment is located, and the superscript f indicates the floor where the equipment is located;

[0038] ...

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Abstract

The invention relates to a nuclear power plant equipment anti-seismic performance evaluation method based on a floor response spectrum, and belongs to the technical field of nuclear power plant operation safety. The method comprises the following steps: step 1, simplifying nuclear power equipment into a single-degree-of-freedom damping system, establishing a motion equation, and selecting a damping ratio and circular frequency; step 2, selecting an analysis step length; step 3, calculating time step by step, and for the ith time step, knowing ti- Calculating the displacement and the speed at the ti moment in the i-th time step according to the recurrence formula listed by the invention at the displacement and the speed at the 1 moment; and step 4, calculating the acceleration of the ti moment in the i-th time step through the motion equation, and finally calculating the peak value of the acceleration response curve as the floor spectrum value of the given frequency and damping ratio for drawing the floor response spectrum, and according to the floor response spectrum, firstly evaluating the anti-seismic performance of the nuclear power plant equipment. The method disclosed by the invention has the advantages of higher solution precision, simple operation steps, easiness in implementation and very high engineering application value.

Description

Technical field [0001] The invention relates to a method for evaluating the seismic performance of nuclear power plant equipment based on floor response spectra, and belongs to the technical field of nuclear power plant operation safety. Background technique [0002] With the rapid development of my country's economy, energy demand has increased sharply, and energy supply has become increasingly tight. More and more people have turned their attention to nuclear energy. In recent years, the construction of nuclear power plants has developed rapidly. Compared with building structures, the design of nuclear power plants is unique, and the accuracy of seismic analysis is higher. The main reason is that the main equipment of nuclear power plants, such as reactor pressure vessels, steam generators, etc., are costly. The cost is often several billion, accounting for nearly half of the total construction cost of nuclear power plants. The seismic design of these key equipment relies on re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G06F17/16G06Q50/06
Inventor 钟博孙运轮陈岩李晓红
Owner CHINERGY CO LTD
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