A number of strategies for optimal design of the gas turbine disks are proposed

which include separation of tenons design from disk design

rational simplification of structural model

check on local constraints

optimal design based on elastic analysis and further check based on elastoplastic analysis

multi level optimization by grouping design variables.According to the strategies a computer program TDSOS is developed for practical use.By applying the strategies and the program TDSOS

shape optimization of gas turbine disk with light mass and low stress level can be obtained and the contradiction among high performance index

reliability and long life expectation is better solved.