滑倒
反向
有限元法
接口(物质)
情态动词
非线性系统
接触面积
结构工程
点(几何)
单方面接触
反问题
模态分析
计算机科学
工程类
数学分析
数学
几何学
材料科学
物理
接触角
经典力学
量子力学
坐滴法
化学工程
高分子化学
作者
Matthew D. Fronk,Kevin Eschen,Kyle Starkey,Robert J. Kuether,Adam Ray Brink,Timothy Walsh,Wilkins Aquino,Matthew Robert Brake
出处
期刊:Conference proceedings of the Society for Experimental Mechanics
日期:2018-06-07
卷期号:: 45-56
被引量:2
标识
DOI:10.1007/978-3-319-74280-9_5
摘要
In computational structural dynamics problems, the ability to calibrate numerical models to physical test data often depends on determining the correct constraints within a structure with mechanical interfaces. These interfaces are defined as the locations within a built-up assembly where two or more disjointed structures are connected. In reality, the normal and tangential forces arising from friction and contact, respectively, are the only means of transferring loads between structures. In linear structural dynamics, a typical modeling approach is to linearize the interface using springs and dampers to connect the disjoint structures, then tune the coefficients to obtain sufficient accuracy between numerically predicted and experimentally measured results. This work explores the use of a numerical inverse method to predict the area of the contact patch located within a bolted interface by defining multi-point constraints. The presented model updating procedure assigns contact definitions (fully stuck, slipping, or no contact) in a finite element model of a jointed structure as a function of contact pressure computed from a nonlinear static analysis. The contact definitions are adjusted until the computed modes agree with experimental test data. The methodology is demonstrated on a C-shape beam system with two bolted interfaces, and the calibrated model predicts modal frequencies with <3% total error summed across the first six elastic modes.
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