Reliability Based Design (RBD)

Grid Feature-Based Weighted Simulation Method for Multi-Objective Reliability-Based Design Optimization

“…Reliability analysis is closely related to the uncertainty theory used to describe the uncertain variables. The corresponding reliability analysis is called probabilistic reliability analysis when the uncertain variable X is defined by probability theory [2]. In probability theory, the uncertain variables are considered as random variables obeying a specific probability density distribution, and the value of LSF of the system is also a random variable.…”

“…In general, the optimal design points of engineering problems are located on the boundary of feasible region, and the uncertainty change of design parameters or design variables is likely to make the optimal design points fall out of feasible region due to the disturbance. As mentioned above, since most of the constraints that work are important mandatory index requirements such as safety, this means that there is a great possibility that the optimization design point cannot meet the mandatory index requirements of the actual engineering system, that is, the reliability of the optimization design is not up to standard, so it is important to research the reliability-based design optimization methods [2]. In RBDO, the optimization model can be formulated as:…”