振动加速因子试验方法研究
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    摘要:

    为了快速获得准确的加速因子,在对Palmgren Miner疲劳累积损伤原理和随机振动宽、 窄带应力作用下累积损伤分布特点研究的基础上,推导出随机振动应力作用下的加速因子计算方程,以此作为加速寿命方程同时结合加速寿命试验理论,设计并实施了样件的加速寿命试验。通过对试验数据的weillbull模型验证和最小二乘数据处理,获得了样件材料的振动加速因子。该试验方法为其他材料的加速因子的试验获取和环境振动试验条件的制定提供实践和理论指导。

    Abstract:

    Determining the acceleration factor which describes the equivalent relation between the time and vibration level is one of the important steps during the vibration durability test. In order to obtain the acceleration factor, based on the law of palmgren-miner fatigue cumulative damage and the theory of cumulative damage under stationary narrow and wide band stress, the calculation equation of acceleration factor is derived. The accelerated life equation, combining with the accelerated life testing theory, is used to design the prototype of the accelerated life test. The test is implemented, and then the test data is verified by weillbull model and processed by least square method, finally the specimen material vibration acceleration factor can be obtained. This test method can provide theoretical and practical guidance to other material acceleration factor test and ambient vibration test.

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  • 在线发布日期: 2013-03-28
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