基于改进遗传算法的桁架结构拓扑优化-研究

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1、目录3.3.1桁架结构的离散变量优化····················································313.3.2改进遗传算法操作·····························································323.3.3算例分析·········································································343.4小结·························································

2、·····························36第4章遗传算法在空间桁架结构拓扑优化设计中的应用···························384.1空间桁架分析··········································································384.1.1空间桁架的应用································································384.1.2桁架结构计算····································

3、······························384.1.2.1基本假设·······························································384.1.2.2模型建立方法·························································384.2桁架的刚度矩阵·······································································394.3空间桁架的设计程序···················

4、··············································424.3.1空间桁架设计的大体流程····················································424.3.2空间桁架设计的数学模型····················································434.3.3遗传算法的编码································································434.3.4计算实例···················

5、······················································444.4小结······················································································46结论与展望······················································································47致谢··················································

6、·············································48参考文献·························································································49作者简介·························································································53攻读硕士学位期间发表的论文和科研成果·······································

7、·······53IV万方数据第1章绪论第1章绪论1.1引言随着全球资源日益短缺，环境污染日趋严重，以及对生活质量要求的提高，人们在社会经济活动、工程建设、企业生产等方面，既要求安全可靠、效益显著，又要求降低材料消耗和保护环境，优化设计与技术成为人们改进工作、提高效率必不可少的手段，其必将会得到更多关注与广泛应用。结构设计优化绝不是用降低安全度来换取经济效益,而是采取更为合理的结构体系和方案,使之更为可靠、经济。例如，如图1.1所示，去年7月23日，河北省晋州市尚未交