scholarly journals Imposing minimum and maximum member size, minimum cavity size, and minimum separation distance between solid members in topology optimization

2020 ◽  
Vol 368 ◽  
pp. 113157
Author(s):  
Eduardo Fernández ◽  
Kai-ke Yang ◽  
Stijn Koppen ◽  
Pablo Alarcón ◽  
Simon Bauduin ◽  
...  
Keyword(s):  
Topology Optimization ◽  
Separation Distance ◽  
Cavity Size ◽  
Minimum Separation ◽  
Member Size

Determination of the Interference Distance Between Two Objects Using Optimization Techniques

1994 ◽  
Author(s):  
Meyer Nahon
Keyword(s):  
Optimization Problem ◽  
Accurate Determination ◽  
Separation Distance ◽  
Optimization Techniques ◽  
Robotic Systems ◽  
Separation Problem ◽  
Optimization Formulation ◽  
Minimum Separation ◽  
Two Bodies

Abstract The determination of the interference distance between objects is a problem encountered in the off-line simulation of robotic systems. It is similar to the problem of finding the minimum separation distance between two bodies — a problem which, at present, is commonly solved using optimization techniques. This paper presents an analogous optimization formulation for the quick and accurate determination of the interference distance between two interfering objects. The optimization problem consists of finding the maximum amount by which the boundaries of two interfering object can be moved back while still maintaining a non-empty interference volume. Since the approach used is similar to that used in the minimum separation problem, a single algorithm has been implemented which, given the position and orientation of two objects, will return the separation or interference distance between the objects, as appropriate.

scholarly journals Evaluation of pounding effects between reinforced concrete frames subjected to far-field earthquakes in terms of damage index

2021 ◽  
Author(s):  
S. H. Hosseini ◽  
H. Naderpour ◽  
R. Vahdani ◽  
R. Jankowski
Keyword(s):  
Reinforced Concrete ◽  
Damage Index ◽  
Seismic Intensity ◽  
Separation Distance ◽  
Coefficient Of Determination ◽  
Far Field ◽  
Concrete Frames ◽  
Rc Structures ◽  
Minimum Separation ◽  
Comparison Of The Results

AbstractIn this paper, three different damage indexes were used to detect nonlinear damages in two adjacent Reinforced Concrete (RC) structures considering pounding effects. 2-, 4- and 8-story benchmark RC Moment Resisting Frames (MRFs) were selected for this purpose with 60%, 75%, and 100% of minimum separation distance and also without any in-between separation gap. These structures were analyzed using the incremental dynamic analysis method under 44 far-field ground motion records. Comparison of the results between the MRFs with and without considering pounding effects show that collisions lead to a decrease in the values of coefficient of determination and the nonlinear damage occurs in lower seismic intensity. As a result, using the damage indexes, nonlinear damages can be detected during a specific seismic intensity. Moreover, considering a minimum separation distance leads to an increase in the coefficient of determination between the damage index and the maximum story drift ratio. Furthermore, due to pounding, shorter MRFs are damaged more significantly than the taller structures.

Topology Optimization of Wing Structure with Manufacturing Constraints

2015 ◽  
Vol 789-790 ◽  
pp. 209-212
Author(s):  
Dan He ◽  
Chun Jing Lin ◽  
Yang Chen Deng
Keyword(s):  
Topology Optimization ◽  
Size Control ◽  
Manufacturing Constraints ◽  
Initial Design ◽  
Optimal Procedure ◽  
Draw Direction ◽  
Wing Structure ◽  
Member Size

A methodology and a procedure for topology optimization of wing structure based on manufacturing constraints were proposed. By the methodology and procedure proposed, topology of thin-box wing structure which is easier manufactured than traditional topology result can be obtained. The manufacturing constraints of draw direction, member size control and inexcusable initial design were introduced into the optimal procedure and executed in Optistruct. Effect and efficiency were analyzed and compared with traditional topology optimization.

Sign in / Sign up

Export Citation Format

Share Document