The Research And Development Of Multiobjective Optimization Design Platform For Rotor Disk

Gas turbine is a large advanced power device which is the essentialequipment in the field of power. Rotor disk is one of the most importantcomponents of gas turbine which achieves great effect of using and safetyperformance of gas turbine. Therefore, how to improve the structure designquality and optimization design results of rotor disks has been a major taskfor gas turbine industry.The current process of optimization design is that the designers useCAD, CAE and optimization software respectively on the rotor disk designto create models, parameterize dimensions, computational analysis and dooptimization to find the best combination of the parameters. Owing to theindependence of the software, designers have to parameterize the model, transfer data between software and set the parameters manually which maycause high error rate and even low efficiency. With the development ofcomputer science, most commercial software provides the externaldevelopment interface, so it’s an effective way to establish the automaticoptimization design platform for rotor disk by using CAD/CAE/MDOintegration.Under this background, the system with the demands of the enterpriseand cooperative development projects for an important basis, establish themulti-objective optimization design platform to achieve the integration andautomation of the optimization process. Through the research of systemintegration method, this paper designs and develops a CAD centricCAD\CAE\MDO integration system for rotor disk design which solves theproblem that traditional MDO solution can only exchange information withneutral file which may cause the lost of high-level design information whichincreases the difficultuy of effective integration. This system use NX, Ansysand Isight as the basic platform, through their respective secondarydevelopment interface to achieve the automatically optimization process ofmulti-objective optimization for rotor disk. The NX platform of this systemis developed by NXOPEN to build friendly interface, automaticallyparameterization and dimension of geometry model. This system use APDL parametric language to establish automatically structure analysis process inAnsys platform and use the Isight Developer development tools in Isightplatforms to establish the data interfaces between the software and drive themulti-objective optimization process of rotor disk.Building a parameterized design model, selecting key geometricparameters as design variables, and minimum the tilt and weight asoptimization objectives, an automatic optimization design platform andprocess is achieved by this platform. It is tested that it improves theefficiency of design for a rotor disk and shortens product development timewhich provides a convenient platform for designers.