Abstract:

The multidisciplinary design optimization(MDO) methods can be used to solve the design problems of largescale complex engineering system effectively.In order to deal well with the quasiseparable MDO problems usually encountered,a two-level alternating optimization method based on penalty function(PAO) method was introduced.PAO is based on decomposition and coordination strategy,that is,the quasiseparable MDO problem is decomposed into a system level problem and many subsystem level problems,and then the  subsystem level problems are solved alternately to achieve the consistency among all subsystems.PAO was first used to the design optimization of a vehicle crashworthiness problem.Results revealed that this method is effective.
Key words：vehicle engineering;multidisciplinary design optimization methods;decomposition and coordination strategy;quasiseparable MDO problems;vehicle crashworthiness;penalty function

Key words: vehicle engineering, multidisciplinary design optimization methods, decomposition and coordination strategy, quasi-separable MDO problems, vehicle crashworthiness, penalty function