一、前言我国现行的车架前叉疲劳试验方法与日本1972年以前的JIS标准中的车架疲劳试验方法基本相同。但是在指标上又远比日本标准高。1974年日本重新修订了标准,在JISD9401—74中制订了新的试验方法。这种试验方法在振动频率、受力状态、振动次 I. Introduction The fatigue test method of the current frame fork in our country is basically the same as the frame fatigue test method in the JIS standard before 1972 in Japan. However, the index is far higher than the Japanese standard. In 1974, Japan revised the standard and developed a new test method in JIS D9401-74. This test method in the vibration frequency, stress state, vibration times