Fuzzy Reliability Of Mechanical Systems Design Theory And Simulation

With the study in the theory of general reliability, we found that there were not only random variables but also lots of fuzzy variables. We must widen the field of general reliability design.The fuzzy reliability design of which include fuzzy mathematics and reliability theory is a very well means that can deal with "fuzzy" of reliability design.In some extend, based on the randomness and fuzziness of basic variables and state variables, we can do it as follows in the paper:1. In the field of engineering intensive, we can regard them as general and random variables;2. The fuzzy method should be used when we faced to lots of and inevitable fuzzy information;3. By means of the transformation from fuzzy reliability design into general reliability design to deal with the problem which is very difficult to obtain the fuzzy events failure probability by the fuzzy events probability formulae directly.4. When we still can't obtain the results, in the paper, we use the software " MATLAB " to simulate it, then get the reliabilities.Comparison and analysis in the illustrations, the results as follow:1. The simulating results of "MATLAB" can do for the engineering intensive;2. Three methods have different results, but the rhythm no change;3. When the shape parameter of fuzzy strength variable is small and the standard error of random stress is large, the results of three methods access to each other;4. Methodl is more suitable for engineering application than the existed methods in the references, we can select different means according to our need.