A multilevel optimal method and its engineering application for heterotypic space grid structure

作者：Hou, Gang Ling^*; Wang, Xiao Dong; Qiu, Ji Jun

来源：Engineering Mechanics, 2018, 35(z1): 188-192 and 199.

DOI：10.6052/j.issn.1000-4750.2017.05.S037

• Computational optimization
• Difference quotient
• Discrete variables
• Engineering applications
• Geometrical characteristics
• Multilevel optimization
• Parameterized languages
• Space grid structures

The heterotypic space grid structure (HSGS) is featured with complex mechanical behavior, a variable structural shape and a strong correlation relationship among structural parameters. HSGS's optimization has always been a challenging subject. By studying geometrical characteristics and mechanical behavior of HSGS, a multilevel optimization method was proposed to minimize the HSGS weight. In the first stage, the strength and stability of HSGS members were optimized in the local constraint. In the second stage, the overall stiffness and stability of HSGS were optimized in the overall constraint. The computational optimization method for HSGS was realized by combining the discrete variable optimization design theory with the relative difference quotient algorithm. The multilevel optimization method of HSGS was programmed by using the ANSYS parameterized language. The validity of the optimization method and program were testified by comparing the results of a real engineering case from the multilevel optimization method with the results of the MST software.

• 出版日期2018
• 单位哈尔滨工程大学