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The synthesis of optimal controllers for vibrational protection of large-scale structures with multiple actuation devices and partial state information is a challenging problem. In this study, the authors present a design strategy that allows computing this kind of controllers by using standard linear matrix inequality optimisation tools. To illustrate the main elements of the new approach, a five-story...
BIW modal optimization with traditional FEM method was inefficiency and usually with much mass increase. FEM analysis combined with Multi-objective Optimization method was used to improve the first order frequency of BIW. Mathematic model was built by response surface method to replace FEM model and NSGA-II was used to get non-dominated solutions. During the optimization plates with high relative...
The continuum structure topology optimization design has been research hot spot and the difficulty in the structure optimization design. This article uses the reliability theory and the ESO method to solve the program of the reliability-based topology optimal design of continuum structural. The mathematical model is established and the perturbation method is utilized to the reliability restraint....
Taking an engineering design case about the dynamic model updating of long-span bridge under environment excitation, the three dynamic calculating models of the cable-stayed bridge are created by the finite element analysis program ANSYS, and the dynamic characteristics were analyzed, further by experimental results carried out on three models optimized amendment. The analysis results show that according...
It is important to evaluate Building Life Cycle Energy Consumption which is the key problem of building energy-saving. In order to get the global optimization for the whole Building Life Cycle (BLC), the multi-objective optimization model is proposed in this paper. Ant colony algorithm is applied to analyze the BLC and find the minimum of energy consumption. This research will assist the implementation...
Taizhou medical city exhibition Center project first adopts channel curtain wall structure, with a beautiful shape, tilt angle and high technology, which solves the key technical design problems of uneven distribution of internal forces in steel skeleton system and large local deformation. On the premise of the comprehensive analysis of several different load combination, irregular geometric space...
Hyper-heuristics are new approaches which aim at raising the level of abstraction when solving combinatorial optimisation problems. In this paper we introduce a new hyper-heuristic model, namely Ant-Q hyper-heuristic, which transliterates the significant learning ability of Ant-Q algorithm proposed by Gambardella and Dorigo, for building good sequences of low-level heuristics aimed at gradually constructing...
The design of technological systems that can be modelled as discrete event systems (DES) constitute a difficult problem with important implications in the performance of the operation of the systems during their complete lifetime. The independent simulation of the behaviour of selected alternative structures for the system to be designed constitutes a classical approach for the decision support systems...
Topology optimization, also known as structural layout optimization, the basic idea is a design method that looking for the most optimal distributing form structural stiffness in design space or the best way to pass power, in order to achieve optimization of some behaviors or alleviation of the structure weight. Used continuum structural topology optimization theory, and carried out pioneering research...
During construction of high buildings, subsidence increases as load increase, and safe or not and development trend are need to be known, so the method for predicating the deformation of high building is presented through the optimized method of grey system theory. The GM(1, 1) model establishing, the raw sequence's transformation and model optimized method are discussed, and the parameter optimized...
Finite element model of crossbeam of GMCU2060 gantry machine center is proposed, the static and dynamic stiffness is analyzed by using finite element analysis. The weak link of the crossbeam is discovered and a modification scheme is put forward for the design of the crossbeam structure. The analysis shows that the maximum deformation of the improved crossbeam is decreased to 0.03 mm and the first...
The performance of an acoustic absorbent lining can be significantly related to the shape of the introduced holes inside the lining, the general shape of holes can be designed by the topology optimization. In this paper, the finite element model of an acoustic absorbent lining is built, the acoustic and structure response characteristics are performed by used of the direct finite element method(FEM)...
The probabilistic and possibilistic methods of reliability analysis of structures have been developed independently. However, the designers will prefer the flexibility of modeling the structural parameter uncertainty either probabilistically or possibilistically depending on the nature and quality of the available data. Thereby, the complex structural model will involve both types of uncertain parameters...
Optimization design of tower crane steel structure is very important for design technique development of tower crane. This paper proposes a kind of parametric optimization model based on Ansys OPT, combined with finite element analysis (FEA) and overall stability theory. The tower body is taken as an example to introduce the building process and the program structure of the parametric optimization...
According to the structure of beam components of bridge type five axis linkage gantry machining center model TH58, three-dimensional solid models were established and meshed by ANSYS software. Using component analysis from the model analysis theory, the finite element models were analysised on static force, vibration model and harmonic response analysis. As a result, beam components structure has...
This paper mainly study structural effective life of tower crane and tower crane fleet monitoring system from the aspects of optimization design, control and management based on system engineering. Firstly, tower crane working parameters were collected dynamically through wireless data transmission technology, whose feasibility has been tested to be good in experiments. Secondly, with improved RBF...
Structural building relocation is a complex dynamic process while the current study to the project was restricted to a specific project and most of the theoretical researches were focused on the rolling way to realize the relocation. The purpose of this paper is to formulate the model of frame structure building relocation by sliding way and to obtain the force in building elements under different...
Double crank four ring-plate-type pin-cycloidal gear planetary drive is a new-type drive with new drive principle. In order to reduce weight of the whole drive, the method of shape optimization of ring-plate in the double crank ring-plate-type pin-cycloidal gear planetary drive was derived. It bases on the principal idea of structural boundary strength optimization method, makes use of APDL in FEA...
By analyzing the deficiency of the previous structural design of the guyed anchor. The essay studies the design optimiization of the guyed foundation of the transmission line repair tower. It designes the most safe, economical and rational foundation type through building mathematical optimization model using of existing design theory of tower, applying the matlab optimization toolbox, preparing to...
For topology optimization of a structure with tension-only material, the effects of the Poisson's ratio of material on the final structural topologies are investigated. To simulate the topology optimization of a structure with tension-only material, the material-replacement method is presented. In the method the original tension-only material is replaced with a new isotropic material with the same...
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