Sequential coupling analysis method for adaptive step length

A technology of adaptive step size and sequential coupling, applied in the field of multi-field coupled system simulation analysis, can solve problems such as low efficiency and excessive number of iterations, and achieve the effect of avoiding sequence conflicts, ensuring accuracy, reducing data interaction and iterative work

Inactive Publication Date: 2012-07-04
ZHEJIANG UNIV
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Problems solved by technology

At present, for this problem, a very small iterative step size is generally used to ensure accuracy and stability, but the very small step size will inevitably result in too many iterations, and the efficiency is low

Method used

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  • Sequential coupling analysis method for adaptive step length
  • Sequential coupling analysis method for adaptive step length
  • Sequential coupling analysis method for adaptive step length

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 As shown, it is a general flowchart of the present invention in analyzing the coupling problem of the motion field and the electromagnetic field in the short-circuit breaking process of the low-voltage circuit breaker.

[0033] Electrodynamic repulsion is generated between the dynamic and static contacts of low-voltage molded case circuit breakers, including the Holm force generated by the contraction when the current flows through the contacts and the Lorentz force generated by the magnetic field excited by the loop current. The Holm force disappears after the moving and static contacts are separated, and the Lorentz force disappears with the disappearance of the magnetic field. Under the action of electric repulsion, the moving contact arm overcomes the pre-pressure of the contact spring and moves before the operating mechani...

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Abstract

The invention discloses a sequential coupling analysis method for an adaptive step length. The sequential coupling analysis method comprises the following steps of: (1) constructing a coupled field analysis model, setting iterative step lengths of a first sub step and a second sub step, performing first and second sub step sequential coupling analysis on each coupling state variable, and thus obtaining a coupling state variable value of an iterative node; (2) extracting the coupling state variable values of the current iterative node of each coupling state variable value and the previous two iterative node, obtaining a gradient of the current iterative node of each coupling state variable curve, setting a step length adjustment range of each coupling state variable, and thus obtaining theiterative step length of the next sub step; and (3) taking the minimum value of the iterative step length of the next sub step from all the coupling state variables as a system iterative step length of the next sub step, performing next sub step sequential coupling analysis on each coupling state variable of a transient field coupling system by adopting the iterative step length, obtaining a coupling state variable value of the iterative node of the next sub step, and returning to the step (2) until the system analysis finish time is up.

Description

technical field [0001] The invention relates to a simulation analysis method of a multi-field coupling system, in particular to a sequential coupling analysis method of an adaptive step size of a transient field coupling system. Background technique [0002] The sequential coupling method is a method for iteratively analyzing two or more physical fields coupled with each other in different engineering fields in a certain order. analysis effect. Using the sequential coupling method to deal with multi-field coupling problems can reduce the dimension of the analysis model, alleviate the ill-conditioning of the system equations, and reduce the analysis cost. [0003] When the sequential coupling method analyzes the steady-state coupling problem, it does not involve the problem of the iterative step size. It only needs to analyze each physical field in turn, and apply the previous analysis result as a load to the second analysis. When the coupling state variables converge At th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 谭建荣张树有徐敬华赵振
Owner ZHEJIANG UNIV
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