目前,用来评价汽车整车、部件及零件耐久性的最精确的方法是使试验对象承受使用载荷,并且观察疲劳裂纹的发生与发展。甚至在严格控制试验条件的情况下,试验结果仍是十分离散的。因此,为了得到可靠的疲劳试验结果,必须以大量的试件进行试验,且把结果做统计处理。这些试验要化费很长的时间,这就使零件的换型周期变得很长。所以,建立一种加速试验方法是十分必要的。在复现使用载荷工况方面,最重要的问题是确定所谓的典型使用工况。这个问题通常是用在试车场上进行比较试验来解决的。在试车场试验时,汽车在不同的路面上,以给定的车 At present, the most accurate method to evaluate the durability of vehicle, parts and components is to subject the test object to the service load and to observe the occurrence and development of fatigue crack. Even in the strict control of the test conditions, the test results are still very discrete. Therefore, in order to obtain reliable fatigue test results, a large number of test pieces must be tested and the results should be statistically processed. These tests take a long time, which makes the conversion period of the components become very long. Therefore, to establish an accelerated test method is very necessary. The most important issue in re-using load conditions is determining the so-called typical operating conditions. This problem is usually solved by using comparative tests on the test drive. When testing in a test car, the car is on a different road to a given car