基于Nastran的粘性和粘弹性人工边界的模拟与验证  

Simulation and Verification of Viscous and Viscous-Spring Artificial Boundary Based on Nastran

作　　者：张焜煌[1] 钱彦岭[1] 徐慧峰[1] 王建伟[1] 

机构地区：[1]国防科学技术大学机电研究所,长沙湖南410072

出　　处：《兵工自动化》2009年第3期29-31,共3页Ordnance Industry Automation

摘　　要：采用通用有限元程序Nastran中的弹簧阻尼单元模拟粘性和粘弹性人工边界。在Nastran中粘性人工边界是采用阻尼单元damper单元实现,粘弹性人工边界采用CBUSH1D单元实现。实例证明该两种人工边界具有较高的精度,并且粘弹性人工边界要好于粘性人工边界,能很好的处理岩土与结构动力相互作用的问题。Viscous and viscous-spring artificial boundaries are simulated by using the spring-damper element in Nastran, the general finite element program. Viscous artificial boundary is implemented by the damper element of Nastran, and the viscous-spring artificial boundary is implemented by the CBUSH1D element of Nastran. It is shown by practical example that the two artificial boundaries have high precision, and the viscous-spring artificial boundary is better than viscous artificial boundary; they can well deal with problems in soil structure dynamic interaction.

关 键 词：粘性 粘弹性 人工边界 岩土与结构动力相互作用 

分 类 号：N945.13[自然科学总论—系统科学]