Probabilistic and Non-probabilistic Reliability Design of Composite Pressure Vessels
Considering both randomness and range of physical parameters and applied loads of the compos-ite pressure vessels(COPV),the netting theory based on probability was applied to obtain the random function's computational expression of fiber strength exploitation coefficient,including establishing COPV reliability-analyzing model and making use of random factor method and interval factor method to deduce computational expressions of mean value,standard deviation and deviation of the fiber strength,and utiliz-ing probabilistic and non-probabilistic reliability calculation method to implement COPV's probabilistic and non-probabilistic reliability design and inspecting fluctuation influence of structure's uncertain parameters on COPV design thickness.The numerical results show that both probabilistic and non-probabilistic relia-bility design results can meet safety requirements,it's more accurate and reasonable than the traditional safety factor method.Compared with the non-probabilistic method,the probabilistic method has smaller rel-ative error,but the calculation process is more complicated.
NETL
NSTL
万方数据
维普
