Dynamic Characteristics of Flexible Bellows

Discrete dynamic models were developed for axial and bending movements. The models were solved by different numerical methods. Experimental verifications showed very good agreement with theory.

Contents

1 Notation
2 Introduction
3 Basic Relations and Limitations
3.1 Bellow Geometry
3.2 Dynamic Loads
3.2.1 Axial Load
3.2.2 Bending Load
4 Theoretical Models
4.1 Analytical model
4.1.1Axial frequencies
4.1.2 Bending frequencies
4.2 Simplification
4.3 Axial MDOF-System
4.3.1 Equation of Motion
4.3.2 Solution Method
4.4 Bending MDOF-System
4.4.1 Equation of Motion
4.4.2 Solution Method
4.5 Combined Axial and Bending Model
5 Comparing the Theoretical Models
5.1 Comparing
5.1.1 Axial Movement
5.1.2 Bending Movement
5.2 Convergence of discrete model
6 Experimental Verification
6.1 Axial Measurement
6.2 Bending Measurement
7 Conclusions
8 References

Author: Tobias Lindberg, Stig Mörtman

Source: Blekinge Institute of Technology

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