The Methods of Smart Structural Dynamic Response Analysis of SINS

2010 ◽  
Author(s):  
Lili Hu ◽  
Jie Li ◽  
Li Qin ◽  
Xining Yu ◽  
Ruiping Tao
Keyword(s):  
Dynamic Response ◽  
Response Analysis ◽  
Structural Dynamic ◽  
Dynamic Response Analysis

Overestimation Analysis of Interval Finite Element for Structural Dynamic Response

2019 ◽  
Vol 11 (04) ◽  
pp. 1950035
Author(s):  
Tuanjie Li ◽  
Hangjia Dong ◽  
Xi Zhao ◽  
Yaqiong Tang
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Structural Parameters ◽  
Upper And Lower Bounds ◽  
Response Analysis ◽  
Uncertain Parameters ◽  
Engineering Structures ◽  
Structural Dynamic ◽  
Dynamic Response Analysis ◽  
Interval Parameters

Dynamic response analysis plays an important role for the structural design. For engineering structures, there exist model inaccuracies and structural parameters uncertainties. Consequently, it is necessary to express these uncertain parameters as interval variables and introduce the interval finite element method (IFEM), in which the elements in stiffness matrix, mass matrix and damping matrix are all the function of interval parameters. The dependence of interval parameters leads to overestimation of dynamic response analysis. In order to reduce the overestimation of IFEM, the element-based subinterval perturbation for static analysis is applied to dynamic response analysis. According to the interval range, the interval parameters are divided into different subintervals. With permutation and combination of each subinterval, the upper and lower bounds of displacement response are obtained. Because of the large number of degrees of freedom and uncertain parameters, the Laplace transform is used to evaluate the dynamic response for avoiding to frequently solve the interval finite element linear equations. The numerical examples illustrate the validity and feasibility of the proposed method.

Interval dynamic response analysis of structures with interval parameters

2008 ◽  
Vol 222 (3) ◽  
pp. 377-385 ◽  
Author(s):  
W Gao ◽  
N Zhang ◽  
J Ma ◽  
X B Wang
Keyword(s):  
Dynamic Response ◽  
Structural Parameters ◽  
Dynamic Responses ◽  
Truss Structures ◽  
Response Analysis ◽  
Superposition Method ◽  
Structural Dynamic ◽  
Dynamic Response Analysis ◽  
Interval Parameters ◽  
Mode Superposition Method

Dynamic response analysis of truss structures with interval parameters under interval loads are investigated using a new method called the interval factor method (IFM). Using the IFM, the structural physical parameters, geometric dimensions, and loads can be considered as interval variables. The structural stiffness and mass matrices can then, respectively, be described by the product of two parts corresponding to the deterministic matrix and the interval factors of structural parameters. The computational expressions for the midpoint value, lower and upper bounds of the structural dynamic responses are derived by means of the mode superposition method and interval operations. The influences of the uncertainty of the structural parameters and loads on the structural dynamic responses are demonstrated by using truss structures.

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