Pingzhang Zhou

Pingzhang Zhou
Beijing Institute of Technology | BIT · School of Aerospace Engineering

Doctor of Philosophy

About

11
Publications
4,951
Reads
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96
Citations
Education
September 2013 - June 2018
Tsinghua University
Field of study
  • Topology optimization, Computational mechianics, Finite element method

Publications

Publications (11)
Article
Full-text available
In this brief note we show that the number of design variables in density-based topology optimization can be phenomenally reduced using discrete cosine transform (DCT), which is one of the most frequently used transforms in digital image compression. Only quite a few nonzero DCT coefficients corresponding to low frequency components are needed to g...
Article
Full-text available
A vibration isolation system is designed using novel hybrid optimization techniques, where locations of machines, locations of isolators and layout of supporting structure are all taken as design variables. Instead of conventional parametric optimization model, the 0-1 programming model is established to optimize the locations of machines and isola...
Article
We developed a new multi-objective and multi-level optimization method to design an active vibration isolation sys-tem. Both the layout of the continuum (i.e. the supporting structure) and the loci of the isolators are designed using topology optimization technique in a unified formulation for the first time. The static, dynamic and vibration-isola...
Article
Full-text available
The non-differentiability of repeated eigenvalues is one of the key difficulties to obtain the optimal solution in the topology optimization of freely vibrating continuum structures. In this paper, the bundle method, which is a very promising one in the nonsmooth optimization algorithm family, is proposed and implemented to solve the problem of eig...
Article
Full-text available
The problem of optimizing truss structures in the presence of uncertain parameters considering both continuous and discrete design variables is studied. An interval analysis based robust optimization method combined with the improved genetic algorithm is proposed for solving the problem. Uncertain parameters are assumed to be bounded in specified i...
Article
PurposeThis article presents a novel approach for synthesizing the vibration isolation system that simultaneously considers the layout of the host structure, the distribution of free or constrained damping layers, and the positions of resilient mounts.Methods The topology optimization model is established by using multi-objective optimization metho...
Article
In this paper, a new topology optimization method is discussed. The basic idea consists of exploring a combination of a density-based method together with a level-set description to form a new optimization frame. Due to the level-set description, solutions show clear and smooth boundaries that are deemed more materially efficient. Additionally, the...
Article
Full-text available
In this paper, we propose to use time-domain transient analysis to compute the response of structures in a wide frequency band by means of Fourier transform. A time-domain adjoint variable method is then developed to carry out the sensitivity analysis of frequency-domain objective functions. By using the concept of frequency response function, it t...
Article
Full-text available
The center of mass and the inertia tensor are important parameters characterizing the kinetic properties of many structural systems, e.g., the rotor, spacecraft, and aircraft. In these occasions, designs not consistent with the requirements on the center of mass and inertia tensor cannot be accepted. In this paper, mathematical models are establish...
Article
In this paper, a novel topology optimization method based on discrete cosine transform (DCT) and density interpolation is proposed for layout designs of 2D and 3D continua. As one of the most frequently used transforms in digital image compression, the DCT may significantly reduce the number of design variables in density-based topology optimizatio...

Questions

Question (1)
Question
I am wondering if GA is capable of solving large-scale(say, 10000 design variables) 0-1programming problems. If not, what is the potential alternatives?

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Projects

Projects (2)
Project
Explore the possibility of applying digital image compression methods to density-based structural topology optimization; Attempt to improve the efficiency of traditional density-based topology optimization methods.