Vehicle road simulation test can simulate random service load spectrum fairly well in laboratory, and is currently a preferable way to fast verify vehicle fatigue properties. Applying a reasonable load spectrum editing technique is a crucial way to accelerate the test and reduce testing time and costs. The present study deals with the generation of test load spectrum for vehicle road simulation test by applying a load spectrum two-dimension time-domain-threshold editing method (STTE) to delete useless load-time segments with negligible fatigue damage to vehicle components. Additionally, a method of load spectrum connection by applying window function was proposed to smoothly connect retained load-time segments when the useless segments were deleted. Taking a vehicle four-post bench test as an example, the process of load spectra generation was discussed in detail. The generated accelerated spectra were reduced to 33% in length relative to the original spectra. The accelerated spectra showed good consistency with the original spectra in terms of amplitude and frequency characteristics. Finally, the accelerated spectra were applied as target spectra to conduct four-post bench test, and good load spectra simulation effect was realized. Therefore, the accelerated spectra can be served as a substitute of the original spectra to conduct the test. To conclude, the proposed load spectra generation methods are suggested as an alternative technique in automotive fatigue data editing.

车辆道路模拟试验可以在实验室中较好地模拟随机服役载荷谱，是目前快速验证车辆疲劳特性的较好方法。应用合理的载荷谱编辑技术是加速测试、减少测试时间和成本的关键方法。本研究通过应用载荷谱二维时域阈值编辑方法 (STTE) 来删除对车辆部件的疲劳损伤可忽略不计的无用载荷时间段，从而为车辆道路模拟试验生成试验载荷谱。此外，提出了一种应用窗口函数的载荷谱连接方法，在删除无用段时平滑连接保留的加载时间段。以汽车四柱台架试验为例，详细讨论了载荷谱的生成过程。相对于原始光谱，生成的加速光谱长度减少到 33%。加速光谱与原始光谱在幅度和频率特性方面表现出良好的一致性。最后将加速光谱作为目标光谱进行四站台架试验，实现了良好的载荷谱模拟效果。因此，加速光谱可以作为原始光谱的替代品进行测试。总而言之，所提出的载荷谱生成方法被建议作为汽车疲劳数据编辑的替代技术。加速光谱与原始光谱在幅度和频率特性方面表现出良好的一致性。最后将加速光谱作为目标光谱进行四站台架试验，实现了良好的载荷谱模拟效果。因此，加速光谱可以作为原始光谱的替代品进行测试。总而言之，所提出的载荷谱生成方法被建议作为汽车疲劳数据编辑的替代技术。加速光谱与原始光谱在幅度和频率特性方面表现出良好的一致性。最后将加速光谱作为目标光谱进行四站台架试验，实现了良好的载荷谱模拟效果。因此，加速光谱可以作为原始光谱的替代品进行测试。总而言之，所提出的载荷谱生成方法被建议作为汽车疲劳数据编辑的替代技术。