EMD-based structural member fatigue simulation analysis method and device, terminal and medium
A technology of simulation analysis and structural parts, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problems of neglecting structural dynamic characteristics, not considering modal effects, solving time and large operation scale, etc. The effect of short calculation time, accurate results and high efficiency
Pending Publication Date: 2022-02-18
SHAANXI AUTOMOBILE GROUP
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The quasi-static method has a fast calculation speed, but ignores the structural dynamics and does not consider the influence of the mode on the fatigue results; the transient method considers the influence of the resonance when the load excitation frequency covers the modal point of the structure, but the solution time and calculation large scale
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[0056] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them.
[0057] Such as figure 1 with 2 As shown, the first aspect of the present application provides an EMD-based fatigue simulation analysis method for structural parts, including:
[0058] (a) Obtain the load signal;
[0059]Obtain the load signal x(t) on the structural parts. The load signal can be obtained through actual measurement, or it can be obtained through virtual iteration with a multi-body dynamic model. When obtained through virtual iteration, multi-body simulation software such as Adams can be used to build the structure of the whole or par...
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The invention provides an EMD-based structural member fatigue simulation analysis method and device, a terminal and a medium. The method comprises: (a) obtaining a load signal; (b) carrying out EMD decomposition and effective IMF component signal screening on the load signal; (c) performing finite element simulation on the structural member to obtain a modal result of the structural member, a stress result of a unit load and a modal stress result in a frequency sweeping state; (d) classifying the screened effective IMF component signals according to whether the screened effective IMF component signals cover modal points of the structural member; (e) respectively carrying out fatigue damage calculation on the classified component signals; and (f) solving the total fatigue damage. According to the invention, the original signals are classified according to whether the original signals cover the structural modal points or not, influences of different frequency bands and structural modals are considered, and a mixed algorithm of fatigue calculation is realized.
Description
technical field [0001] The application belongs to the technical field of fatigue simulation analysis of structural parts, and specifically relates to an EMD-based fatigue simulation analysis method, device, terminal and medium of structural parts. Background technique [0002] The traditional time-domain fatigue simulation analysis methods mainly include quasi-static and transient methods, both of which have their own advantages and disadvantages. The quasi-static method has a fast calculation speed, but ignores the structural dynamics and does not consider the influence of the mode on the fatigue results; the transient method considers the influence of the resonance when the load excitation frequency covers the modal point of the structure, but the solution time and calculation large scale. [0003] In 1998, N.E.Huang, a Chinese-American engineer, creatively proposed the empirical mode decomposition method, referred to as EMD decomposition, which is a new type of adaptive ...
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IPC IPC(8): G06F30/23G06F119/04G06F119/14
CPCG06F30/23G06F2119/14G06F2119/04
Inventor 赵卫艳黄森王淼史季青
Owner SHAANXI AUTOMOBILE GROUP