关键词: 承载构件, 汽车可靠性, 汽车试验场, 试验规范, 雨流计数法, 载荷谱

Abstract: In order to research the fatigue reliability of the load carrying structures on a heavy duty vehicle, a new reliability test technique correlated customer usage is proposed based on automotive proving ground, and the technique can combine the real customer field usage to the vehicle with the enhancement test on proving ground, and avoid the test blindness. Aiming at the data that are tested on the typical road surfaces of the customer and enhancement roads of proving ground, the rain-flow counting method is used to obtain the load distribution matrixes, according to the correlation equation, the cumulative fatigue damage and loading spectrum covering the 90% customer and proving ground are optimized and calculated. Through the correlation analysis of the test data, the road surface enhancement coefficient and the customer data reliability test specifications of proving ground are obtained. The test results indicate that the new specifications can predict the potential failures of the load carrying structures quickly, shorten the test cycles, and reduce the test cost and new product development expense, compared with the existing test method.

Key words: Automobile reliability, Automotive proving ground, Load carrying structures, Loading spectrum, Rain-flow counting method, Test specifications