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Method for calculating load amplification factor in system dynamic analysis

A technology of dynamic analysis and amplification factor, which is applied in the dynamic analysis and calculation of pipelines and auxiliary systems, and in the field of main equipment in reactor coolant systems, can solve the problems of high test cost, difficult theoretical derivation, and lack of experience, and reduce the calculation process. Conservative problems, reliable calculation results

Inactive Publication Date: 2020-03-24
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0010] The invention provides a numerical calculation method of the load amplification factor in the dynamic analysis of the reactor coolant system and auxiliary system, which solves the problem of numerical determination caused by lack of experience, high test cost and difficulty in theoretical derivation

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  • Method for calculating load amplification factor in system dynamic analysis
  • Method for calculating load amplification factor in system dynamic analysis
  • Method for calculating load amplification factor in system dynamic analysis

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Embodiment Construction

[0036] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0037] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0038] Please refer to Figure 1-Figure 6 , this embodiment aims at analyzing the dynamic response of a pressurized water reactor system under earthquake load, ...

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Abstract

The invention discloses a method for calculating a load amplification factor in system dynamic analysis. The method comprises the steps of establishing a system model dynamic analysis model by applying a finite element calculation program,through a mechanical analysis result of a nominal model, determining key input and output parameters by combining contact relationships between the components; using the distribution interval and the uniform distribution hypothesis of key input parameters; establishing a probability density function for describing key input parameters of the system model; obtaining a probability density function and a distribution interval thereof; applying a Latin hypercube sampling algorithm to perform numerical sampling on key input parameters of the system and verifythe rationality of the key input parameters; creating a key input-output big database through finite element transient calculation to make a result analysis of the database, acquiring the ratio of anupper limit value of a 99% confidence interval to a nominal model calculation value and quantitatively giving the dynamic response influence degree, namely a load amplification factor, of input uncertainty on response.

Description

technical field [0001] The invention belongs to the field of reactor structural mechanics analysis, in particular to the dynamic analysis and calculation of main equipment, pipelines and auxiliary systems in a reactor coolant system. Background technique [0002] In the structural mechanics analysis and safety assessment of the reactor coolant system, the system dynamic analysis model (hereinafter referred to as the system model) may be the main equipment in the reactor coolant system (such as the reactor system, reactor coolant pump, steam generator, pressure regulator, etc. device), pipeline system (such as main pipeline, auxiliary pipeline) or auxiliary system (such as waste heat removal system, purification system, etc.). This model is generally used to calculate the dynamic response and load distribution among the main components of the analysis object under the action of external dynamic loads (such as earthquake, LOCA, impact, etc.), and provide calculation input for ...

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Application Information

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IPC IPC(8): G06F30/23G06F119/14
Inventor 黄茜熊夫睿王碧浩蔡逢春兰彬余晓菲齐欢欢沈平川宋海洋江小州
Owner NUCLEAR POWER INSTITUTE OF CHINA
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