Abstract
The acceleration delivered to the bracket are measured on the expressway, national highway, local road, city street, and unpaved road. The measured acceleration signals are analyzed virtual damage and frequencies by extending the 160,000km. For the accelerated vibration test, the acceleration test of six degrees of freedom (DOF) in the time domain using MAST and the acceleration test of single-DOF in the frequency domain using single axis equipment are performed. The measured PG acceleration signals as same as virtual damage of the 160,000km, are used for the accelerated test of six DOF. The axis which shows the maximum virtual damage value from real road test is used for the single-DOF test. The tests are performed by enveloping and amplifying PSD lines of real roads after analyzing frequencies. No failure is found in the six-DOF acceleration tests. However in single-DOF tests, the connection part between the battery and bracket had been broken. It is the reason why the chosen test axis is with the maximum virtual damage values in analyzing the real roads. The results are satisfactory safety wise, however further research will improve optimization.
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