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为提高自然伽马能谱测井仪壳体结构的可靠性,设计时按照工程实际,将壳体的几何尺寸、应力等各参数视为随机变量,采用蒙特卡罗模拟技术,通过Inventor三维实体建模、模型导入ANSYS进行静应力分析、生成概率分析文件、使用PDS模块计算可靠度等步骤,可以得到比传统设计方法精度高的壳体失效概率及可靠度。以壳体为例进行计算,在置信度为95%时,该壳体的可靠度为100%;表明这种利用ANSYS/PDS模块对壳体进行可靠性分析的方法是可行的,为自然伽马能谱测井仪壳体的可靠性设计提供了新的思路,具有一定的工程应用价值。
In order to improve the reliability of the natural gamma ray logging tool shell structure, the design parameters of the shell geometry, stress and other parameters as a random variable, using Monte Carlo simulation technology, Inventor three-dimensional entity Modeling, model import ANSYS static stress analysis, generation of probability analysis files, the use of PDS module to calculate the reliability and other steps, you can get more than the traditional design method of high precision shell failure probability and reliability. Taking the case as an example, the reliability of the shell is 100% when the confidence is 95%. It shows that the method of using ANSYS / PDS to analyze the shell reliability is feasible, The design of the horse’s spectrum toolbox provides a new idea for the reliability design of the shell, which has certain engineering application value.