Method for generating bench test load by road spectrum load

Abstract

The invention relates to a processing method of a road spectrum load, and concretely discloses a method for generating a bench test load by the road spectrum load. The method comprises the following steps of confirming road spectrum data; scheduling the spectrum load; substituting a material attractive S-N curve of a bench test target into the road spectrum data to obtain a damage value D1; performing rain-flow counting statistics on the road spectrum data; substituting a result into the S-N curve to obtain a load-pseudo damage matrix; extracting multi-stage loads from the load-pseudo damage matrix; performing ordered arrangement on the multi-stage loads; after a load time-domain spectrum is formed, substituting the result into the S-N curve to calculate a pseudo damage value D2; comparingwhether a ratio of D1 / D2 is in a range of 95 percent to 105 percent or not; if the ratio of D1 / D2 is in the range of 95 percent to 105 percent, completing the extraction; and if the ratio of D1 / D2 isnot in the range of 95 percent to 105 percent, returning to the previous steps for extracting the multi-stage loads again. The processing method is applicable to high-grade and low-grade bench test equipment, and has the advantages that the test accuracy can be ensured; the reasonable graded load can be fast selected according to the order of magnitude of the damage value; the road spectrum dataprocessing time can be effectively reduced; the efficiency is improved; and the time cost is reduced.

Description

technical field [0001] The invention relates to a method for processing road spectrum loads, in particular to a method for generating bench test loads from road spectrum loads. Background technique [0002] In the development process of auto parts or systems, there are bench fatigue test verification and vehicle reliability test verification. The bench fatigue test verification is due to the short test period, low test cost and the ability to test a large number of samples, so in Bench fatigue test verification will be carried out in the early stage of development to discover and solve fatigue life problems of components as early as possible. However, how to design the load of the bench fatigue test so that the test results can maintain consistency with the verification results of the subsequent vehicle reliability test, there are currently two main ways, one is to extract single-level loads based on road spectrum loads and personal experience Fixed-amplitude and fixed-freq...

AI Technical Summary

Problems solved by technology

The above method requires multi-axial loads, is only suitable for high-end experimental equipment with multi-axial loads, and requires a large number of block cycles

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