In this paper, a finite element model updating (FEMU) method is proposed based on the response surface (RSM) and genetic algorithm (GA) to establish high-precision (FE) of space station scientific experiment racks. First, fine solid mixed FE models are established, respectively, comparison modal test results conducted. Then, an orthogonal experimental design used analyze significance parameters...

Cracks and other damages generated during the service of bridges can reduce load bearing capacity threaten operational safety.Finite Element Model Updating (FEMU), as one important means structural health diagnosis, identifies damage through changes in model parameters. The three key factors FEMU are updating variables, objective functions, optimization algorithms. poor selection above existing...

Finite element formulations based generally on classical beam theories such as Euler-Bernoulli or Timoshenko. Sometimes, these two formulations could be problematic expressed in terms of restrictions of Euler-Bernoulli beam theory, in case of thicker beams due to non-consideration of transverse shear; phenomenon that is known as shear locking characterized the Timoshenko beam theory, in case of...

Layered materials are becoming increasingly important for the production of high performance components and constructions. Their stiffness properties are fundamental to assess stress fields during design calculations. A testing method to assess the in-plane elastic properties of each individual layer of a laminate has been developed [1]. The proposed procedure is based on a multi-model updating...

This paper proposes a Bayesian RC-frame finite element model updating (FEMU) and damage state estimation approach using the nonlinear acceleration time history based on nested sampling. Numerical (FEM) parameters are selected through sampling, their probability density is estimated history. In first step, we estimate error standard deviation select FEM that required to be updated by FEMU. secon...

Abstract The accuracy of finite element model updating for structural damage identification is easily affected by the noise in measured modal, so sliding smoothing method introduced to reduce impact noise. In each iteration step, denoising applied difference between modal and simulated from because time-frequency characteristic actual different modal. parameters after are used construct objecti...

The Quadratic Finite Element Model Updating Problem (QFEMUP) concerns with updating a symmetric second-order finite element model so that it remains symmetric and the updated model reproduces a given set of desired eigenvalues and eigenvectors by replacing the corresponding ones from the original model. Taking advantage of the special structure of the constraint set, it is first shown that the ...