Français
6. Choice and optimal layout of structures
As we stated in chapter , the simplest way to take damping into account when modeling a complex structure is to use the loss factor η. This is especially true when finite elements are used to model the system and calculate the dynamic behavior of the structure [3]. In this case, indeed, by using the factor η for material modeling, we arrive at an estimate of the overall damping of the structure, for each natural frequency of the complete structure.
If we want to calculate the damping of the s-th vibration mode, η s , for a structure composed of N elements each with damping η e , we show that this can be approximated by :
The Ultimate Scientific and Technical Reference
This article is included in
Functional materials - Bio-based materials
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Choice and optimal layout of structures
Conclusion
Viscoelastic materials have many applications in various fields; examples are shown in figure 1 .
Bibliography
References
Standardization
Current standards for materials testing
- Standard test methods for rubber deterioration-Dynamic fatigue - ASTM D430-06 - (2000)
- Standard test method for measuring vibration-damping properties of materials, American Society for Testing and Materials - ASTM E756-05 - (2005)
- Method for graphical presentation of the complex modulus of damping materials, UK - BS 7544 - (1991)
- Determination of the...
The Ultimate Scientific and Technical Reference
