Exhaust system hanging position optimizing method based on mode superposition
A technology of exhaust system and optimization method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems affecting the smooth performance of the whole vehicle, and achieve the effect of predicting the impact
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[0012] Example: see figure 1 .
[0013] 1) Establish a finite element model of the exhaust system and perform free modal analysis;
[0014] 2) On the finite element model, select a part of the potential exhaust system hanging nodes, and perform weighted superposition calculation on the modal displacement of the nodes;
[0015] 3) Determine the hanging position of the exhaust system according to the weighted displacement of each potential node, combined with various factors such as layout;
[0016] 4) According to the determined hanging position of the exhaust system, conduct a sensitivity analysis of the exhaust system to verify the rationality of the hanging position.
[0017] The calculation method of the weighted displacement summation is as follows, assuming a single point excitation, based on the modal analysis theory of a multi-degree-of-freedom system, the frequency response function between the response point l and the excitation point p is: among them, Is the l-th measuring p...
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