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本文阐述了用谱分解定理再现路面谱的方法，它可用于汽车的室内模拟试验，试验结果表明这种方法简单易行且有足够的模拟精度。
In this paper, we describe the method of spectrum representation using spectral decomposition theorem, which can be used in indoor simulation test of automobile. The experimental results show that this method is simple and feasible and has sufficient simulation accuracy.