Vibration from Underground Railways: Considering Piled Foundations and Twin Tunnels

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Vibration from Underground Railways: Considering Piled Foundations and Twin Tunnels

Author: Kirsty Alison Kuo King’s College University of Cambridge | Size: 6.8 MB | Format: PDF | Quality: Unspecified | Publisher: King’s College University of Cambridge | Year: September 2010 | pages: 208

Most engineering courses on vibration begin with a mass on a spring, and then move on to continuous systems such as strings, columns and membranes. These simple systems provide students with a good understanding of the fundamentals of vibration theory, and the physical behaviour of such systems is represented by using well-known equations. However, many vibration problems do not involve such simple systems.
In the past, to solve these problems, engineers would turn to experimental investigations, or would construct simple models that could capture the essential physical behaviour and yet be solved using the available computational techniques. Nowadays, many engineers use commercial software packages that make use of powerful numerical methods such as finite-element or boundary-element methods as their primary tool in constructing models. The difficulty that may arise from the use of such software (that is specially designed to have a user-friendly interface) is that many practitioners lack an awareness of the limitations of these numerical models, and the uncertainty that may be present in the results is often poorly understood

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