Further Comment on "Mathematical Modeling of Spinning Elastic Bodies for Modal Analysis

AIAA Journal ◽  
1975 ◽  
Vol 13 (11) ◽  
pp. 1541-1542
Author(s):  
Bertrand T. Fang
Keyword(s):  
Mathematical Modeling ◽  
Modal Analysis ◽  
Elastic Bodies

Mathematical modeling of spinning elastic bodies for modal analysis.

AIAA Journal ◽  
1973 ◽  
Vol 11 (9) ◽  
pp. 1251-1258 ◽  
Author(s):  
PETER W. LIKINS ◽  
FRANK J. BARBERA ◽  
VICTOR BADDELEY
Keyword(s):  
Mathematical Modeling ◽  
Modal Analysis ◽  
Elastic Bodies

Some Remarks on the Identification of Damping Parameters at the Boundary of Vibrating Systems

1995 ◽  
Vol 48 (11S) ◽  
pp. S107-S110
Author(s):  
Peter Hagedorn ◽  
Ulrich Pabst
Keyword(s):  
Mathematical Modeling ◽  
Modal Analysis ◽  
Mechanical Systems ◽  
Experimental Modal Analysis ◽  
Steel Beam ◽  
Modal Data ◽  
Stiffness And Damping ◽  
Parameter Values ◽  
Vibrating Systems

In many cases, vibrating mechanical systems permit a reliable mathematical modeling with parameter values which are reasonably well known beforehand, except for the joints between different subsystems and at the boundaries. The boundary stiffness, which is often assumed as infinite, and the damping at the boundary, which is frequently ignored, are typically not well known. In this note, we discuss the identification of the boundary stiffness and damping parameters from modal data. As an example, we treat an elastic steel beam, for which an experimental modal analysis had been carried out in our laboratory.

Modal Analysis for the Tower of Large Scale

2013 ◽  
Vol 299 ◽  
pp. 31-34
Author(s):  
Jie Zhou ◽  
Ji Sheng Ma ◽  
Hui Yong Deng ◽  
Mei Yin Zhang ◽  
Bao Jian Wu
Keyword(s):  
Mathematical Modeling ◽  
Finite Element ◽  
Optimal Design ◽  
Modeling And Simulation ◽  
Modal Analysis ◽  
Large Scale ◽  
Vibrational Mode ◽  
Dynamical Characteristic ◽  
Shell Elements ◽  
Multimodal Analysis

The rocket launch tower is a kind tower of large scale which is used in many important palces, in order to counter the tower faults problems such as leaning, bulking, etc.According to the theory of multimodal analysis, mathematical modeling and simulation of vibrational mode were conducted for the tower. The paper describes how the finite element modal for steel tower is built by means of beam and shell elements by Patran, and the analysis of the tower’s dynamical characteristic, bulking phenomenon employing commercial software Patran/Nastran,show that the results are closer to the test data,providing a basis for the tower optimal design.

Analysis and Design of Integrated Optimization of 1.5MW Wind Turbine Tower

2014 ◽  
Vol 971-973 ◽  
pp. 958-961
Author(s):  
Yong Zhi Xie ◽  
An Le Mu
Keyword(s):  
Mathematical Modeling ◽  
Wind Turbine ◽  
Modal Analysis ◽  
Static Analysis ◽  
Optimization Algorithm ◽  
Parametric Modeling ◽  
Analysis And Design ◽  
Wind Turbine Tower ◽  
Tower Structure ◽  
Ansys Workbench

This paper uses Isight_FD 5.6 to integrate UG8.0 parametric modeling, ANSYS Workbench static analysis, modal analysis, and mathematical modeling of design optimization, by means of optimization algorithm, to meet strength and the stiffness of the tower, to realize the optimization of tower structure, so as to attain the expected target which reduces the weight of tower.

scholarly journals Mathematical modeling of low-frequency diagnostic vibration-acoustic vibrations of linear-extended energy objects of housing and communal services

2020 ◽  
Vol 216 ◽  
pp. 01076
Author(s):  
V.E. Zakharova ◽  
S.O. Gaponenko ◽  
A.O. Fedotova
Keyword(s):  
Mathematical Modeling ◽  
Modal Analysis ◽  
Software Package ◽  
Lateral Pressure ◽  
Low Frequency ◽  
Acoustic Vibrations ◽  
Ansys Software ◽  
Natural Vibrations ◽  
Polyethylene Pipes

A modal analysis of natural vibrations of polyethylene pipelines is proposed, which is a calculation of the vertical and lateral pressure exerted by the soil on the pipelines, on the basis of which the study of vibrations in the ANSYS software package was carried out. The results of modal analysis are presented for polyethylene pipes with a layout with inclined walls and various soils.

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