Aiming at the shortage of the conventinal way determing the princiipal parameter in strnctural design of fluid cylinder, there are some shortcomings, however the traditional optimal design also has its flaws. In the traditional optimization algorithms, such as the （＇omplex method, there exists the phenomenon of local optimum. Therefore the resuhs of this traditional optimization design are not the optimalest design. Based on the course, probability and rule in chaos, a software of structural optimal design on chaos search was made, and optima...
