Safety Evaluation Based on Identification Approaches Related to Time-Variant and Nonlinear Structures

ISBN-13: 9783528065355 / Angielski / Miękka / 1993 / 324 str.

Hans G. Natke

Opis

Safety evaluation by definition involves many complex factors and thus covers a wide range of topics. In order to focus the content of the workshop the subject matter was specific to the state of the art and the recent developments in nonlinear and time-variant methods employing identification procedures. Participants in the workshop represented a wide range of expertise. They were se lected in order to cover the state of the art of knowledge in fault-detection and dam age assessment, system identification, signal processing, mathematical and physical modelling and applications of techniques such as fuzzy logic and neural networks. The emphasis was placed on the exploitation and understanding of nonlinearity arising from structural or material faults. Figure 1 indicates the range of topics covered in the workshop. Since no unique or general approach yet exists for treating nonlinearity in the field of safety evaluation, many of the topics presented were problem specific. In order to assist the reader in selecting the material of primary interest a matrix of the topics covered by each participant is shown in Table 1. This table relates the authors to the subject matter, providing a guide through the diverse range of topics presented at the workshop."

Spis treści

Evaluation of Diagnostic Methods.- Advantages and Disadvantages of Intensity Measurements.- Measurements of Linear and Nonlinear Structures with Distributed Shell Sensors (Distributed Sensing and Identification).- Damage Evolution and Diagnosis in Operating Systems.- Time-Variant Methods in Machinery Diagnostics.- Nonlinear Mechanical Systems, Sinusodia Excitation Signal and Modal Analysis: Theory.- A Damage Localization Algorithm for Nonlinear Structures.- Dynamic Damage Indicators for Composite Based Structures.- Identification of Parameters, III-Posedness and Adaptive Systems.- Estimation of Physical Parameters for Dynamic Processes with Application to Fault Detection of an Industrial Robot.- Detection and Location of Damage Causing Non-linear System Behavior.- Nonlinear Problems in Selectively Sensitive Identification of Structures.- Safety Evaluation of Electric Pylons Using Impulse Testing.- Damage Assessment Through Nonlinear Structural Identification.- The Identification of Non-linear Systems with Statistically Equivalent Polynomial Systems.- Damage Assessment from the Dynamic Response of Deteriorating Structures.- Some Issues in the Identification of Structural Systems Through the Use of Neural Networks.- The Application of Neural Networks to Condition Monitoring of Non-linear Structures.- Fuzzy Logic, Neural Networks and Soft Computing.- Summary and Conclusions.