Abstract: Generation of valid and effective test spectra from proving ground recorded loading spectra is critical in the indoor road simulation test. A set of spectrum development methodology is induced, which includes selection of proving ground recorded loading spectra and acceleration of durability test spectra. For the selection of loading spectra, traditional methods are mostly based on spectrum damage. Statistical characteristics of loading spectrum are taken into account, and a new selection methodology, which is based on concatenation of multi-sections minimum standard deviation spectrum(CMSD), is proposed. The generation method of CMSD is also illustrated. Based on proving ground recorded loading spectra, the CMSD is created. Fatigue damage analyses results have shown that CMSD is equal to mean damage spectra. For the acceleration of test spectrum, time domain signal compression method is applied to develop accelerated spectrum. The accelerated spectrum is applied as the target spectrum, and vehicle durability test is conducted. The fatigue models, which are the same as those of proving ground test, have occurred during the test. The validity of this set of methodology is verified, and it can be a reference for other vehicle indoor road simulation tests.

Key words: concatenation of multi-sections minimum standard deviation spectrum(CMSD), indoor road simulation test, selection of loading spectra, time domain signal compression