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EVD5 – Coursework Information for Academic year 2025-2026
Engineering Vibrations and Dynamics 5 (EVD5)
The assessment of Engineering Vibrations and Dynamics (EVD5) course you are required to conduct a
coursework which holds 100% of the total grade of the course consisting in two parts: Part I – Technical
review report (20%) and Part II – Technical simulation report (80%). The coursework should be
conducted individually. Please submit the two parts as a combined single file.
The submission deadline of the coursework is by Tuesday, 21st April 2026 at 14:00.
Part I – Technical review report (20%)
In this part, students are required to conduct a technical review of their chosen topic by analysing one
paper selected from the provided list of publications. All topics are interconnected through the content of
the course. A supporting book chapter will also be provided, focusing on Environmental and Operational
Variabilities (EOV). If the selected topic does not explicitly address EOV, students should include a reflec tion on how an EOV mitigation technique could be applied within the context of the chosen journal paper.
The technical review report should be limited to three pages, with an additional page allowed for references.
The aim of the proposed report is to provide a thorough review of a particular vibration-based analysis or
methodology, enabling an engineer interested in the technique to understand the research question addressed,
the methodology, experimental approach, technical aspects, and the challenges associated with the topic.
More specifically, the technical review report should implicitly address the following questions:
What is the research statement of the work
How the content of EVD5, both theoretical and descriptive (methodologically) can be related to the
work
How the theoretical fundamentals have facilitated the outcomes of the work
Identify and reflect on the innovations proposed in the work
How the work can be extrapolated to other fields or studies
You are advised to use the following structure for your technical review report; however, adherence to
this structure is not mandatory.
Abstract.
Your abstract should be between 100-150 words. It should summarise the main aim of the report given
an indication of the research question addressed, methodology and main general findings.
Introduction and Motivation.
This includes the introduction, background section and problem statement. The introductory sections
set the scene. They do this by providing some basic background information and introducing the
research question that your report will be addressing. You should focus on explaining why this question
is important. A final paragraph in the introduction setting out the structure of the paper is also helpful.
Theoretical fundamentals and Methodology.
Describe and define the theoretical fundamentals on what the work has been set. Try to bring the
content learnt during the course for a comprehensive reflection. What are the approaches conducted
What are the main assumptions How the methodology has been defined and what are the contribu tions of each step on the global study
Experimental and/or Validation of the work.
How the experimental campaign has been defined and what assumptions have been made to facilitate
the experiment and validation of the work. Which instrumentation has been used How the data has
been acquired Also, how would you have complemented the study to provide a more comprehensive
study
Discussion and Innovations.
What are the innovations presented in the work How the work has built up on the fundamentals to
address the research statement under consideration
Conclusions and Limitations.
The conclusions section should summarise the most important points of your technical report. Also
reflect on the main impact of the work and how this can be extrapolated to further analysis, applica tions. You should also be able to identify the limitations of the work and what could be a changed to
overtake the challenges that this work has aroused.
References
You should include the full citation to referenced documents using a recognised referencing system (e.g.
Harvard, Vancouver . . . ). A recommended number of 10 references is appropriated for this report.
Part II – Technical simulation report (80%)
A platform is supported by a beam as illustrated in the Figure 1. The owner of the installation has
concerns due to the potential deterioration of the beam because it is exposed to severe operational conditions
and thus prone to failure. The owner is looking for engineering experts in the field of structural dynamics as
they are looking for installing a vibration-based system to evaluate potential deterioration of the structural
element. The structure is intended to be instrumented with accelerometers along the span of the beam (see
Figure 1) to measure in the longitudinal direction. The structural manager of the company has listed the
requirements for this project and they require a well-justified with evidence report to take the appropriate
decisions. The owner also requests any additional suggestions or innovations beyond the stated requirements.
Figure 1: Graphical representation of the structure.
Specifications:
Diameter: d=30cm
Length: L=5m
Material steel
Elastic modulus: E= 200 GPa
Density: ρ= 7800 kg/m3
A technical simulation report has been asked by the company with maximum five pages and it should
contain the following points:
1. Construct the free body diagram and derive the corresponding equation of motion for every degree of-freedom.
2. Calculate the theoretical modal parameters of the structure.
3. Assuming proportional damping, calculate the modal damping ratios of the structure.
4. Calculate the Frequency Response Function (FRF) of each degree of freedom in respect to the excita tion point at a fixed point.
5. An experimental modal analysis is to be performed before the structure will be in operation thus the
model could be validated. Compare with those obtained in step 2.
6. Now, model the system in the state-space form and using Runge Kutta or matrix exponential method
solve it numerically to obtain the structural displacements, velocities and accelerations for a random
excitation at all the degree of freedom.
7. Calculate the Power Spectral Densities of the responses at each degree of freedom. How do they
compare with the theoretical FRFs
8. Using the model in 6, assume the system to be output-only and apply Operational Modal Analysis
(OMA) to the system considering all the degree of freedom and estimate A and C matrices. Estimate
the modal parameters (natural frequencies, damping ratios and mode shapes) and comment in the
assumptions/parameters selected. Then, compare with ones estimated in step 2 a 5.
The structure is sometimes exposed to 400 Celsius due to its operation, which reduces the Elastic
Modulus of the steel to 180GPa.
9. Please recalculate the modal parameters in the step 2 and in the step 4. As well as the estimation of
the modal parameters estimated as in the step 8.
10. Discuss and evaluate the consequences when comparing before and after the extreme temperature
change.
11. If you were to implement an strategic to mitigate the temperature variability how would you do it
EVD5 – Coursework Information for Academic year 2025-2026
Engineering Vibrations and Dynamics 5 (EVD5)最先出现在KJESSAY历史案例。