Dynamics of Structures | EveryEng

Skip to main content

Self-paced Advanced

Dynamics of Structures

4(117)

2 enrolled

259 views

FREE

1570 min

Anytime

English

259 views

Engineering AcademyLearn Without Limits: Free Engineering Courses

Infrastructure & Construction

Civil & Structural

Lifetime access
Anytime Learning
Learn from Industry Expert
Career Option Guideline

Why enroll

This course is essential for civil and structural engineers involved in the design of buildings, bridges, and infrastructure subjected to dynamic loads. It helps learners understand the fundamental principles behind seismic design codes and dynamic analysis software. The knowledge gained is critical for designing safe, efficient, and resilient structures and is highly relevant for higher studies, research, and competitive examinations.

Your instructor

Engineering Academy

Engineer

Learn Without Limits: Free Engineering Courses

5+ yrs experience·India

Is this course for you?

You should take this if

You work in Infrastructure & Construction
You're a Civil & Structural / Mechanical Engineering professional
You have 3+ years of hands-on experience in this field
You prefer self-paced learning you can revisit

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Civil & Structural
You need live interaction with an instructor

Course details

The Dynamics of Structures course provides a comprehensive understanding of how structures respond to time-dependent and dynamic loads such as earthquakes, wind, impact, machinery vibrations, and moving loads. The course explains the fundamental difference between static and dynamic behavior and highlights the role of mass, stiffness, and damping in governing structural response.

The course begins with the formulation of equations of motion for structural systems and introduces essential concepts such as natural frequency, period of vibration, damping ratio, and resonance. Learners study free vibration and forced vibration of single-degree-of-freedom (SDOF) systems under undamped and damped conditions. The response of structures to harmonic, periodic, and transient loads is analyzed in detail, with emphasis on displacement, velocity, and acceleration responses.

The course then extends to multi-degree-of-freedom (MDOF) systems, where learners examine coupled equations of motion, mode shapes, natural frequencies, and orthogonality properties. Modal analysis techniques are introduced to decouple complex systems and evaluate dynamic response efficiently. Numerical methods such as step-by-step integration and time-history analysis are also discussed to handle complex loading conditions.

Throughout the course, engineering applications such as earthquake-induced ground motion, wind-induced vibrations, and dynamic response of buildings and bridges are emphasized. By the end of the course, learners develop the ability to model dynamic systems, interpret dynamic response results, and apply dynamic analysis concepts to the design and assessment of structures.

SOURCE- Youtube [NPTEL IIT Bombay]

Course suitable for

Key topics covered

Fundamentals of structural dynamics
Types of dynamic loads and structural response
Single-degree-of-freedom (SDOF) systems
Free and forced vibration analysis
Damping models and energy dissipation
Response of structures to harmonic loading
Multi-degree-of-freedom (MDOF) systems
Modal analysis and mode shapes
Introduction to numerical methods in dynamics
Basics of earthquake and wind-induced vibrations

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

29 lectures26 hr 10 min

Introduction to Structural Dynamics
50 min
Equation of Motion
42 min
Idealization of Structures
50 min
Components of Dynamic System
45 min
Free Vibration
52 min
Damped Free Vibration Part 1
38 min
Damped Free Vibration Part 2
54 min
Undamped Harmonic Excitations
66 min
Damped Harmonic Excitations
59 min
Frequency response curves
40 min
Transmissibility
73 min
Energy in Forced Vibrations
57 min
Unit impulse Functions
54 min
Step and Ramp Forces
63 min
Pulse Excitations
63 min
Numerical Response Methods
67 min
Seismic Response Spectra
64 min
Continuous systems
59 min
Lumped mass systems
56 min
Equation of motion.
67 min
Equation of motion - examples
55 min
Mode shapes and frequencies
62 min
Free vibration- Undamped and Damped
45 min
Damping in MDOF Systems
27 min
Forced response of MDOF systems
30 min
Modal superposition Analysis
62 min
Response Spectrum Analysis
48 min
Concept of Seismic Isolation
49 min
Dynamics of Base-isolation Systems
73 min

Opportunities that await you!

Career opportunities

Why people choose EveryEng

Industry-aligned courses, expert training, hands-on learning, recognized certifications, and job opportunities-all in a flexible and supportive environment.

FREE

Access anytime

Questions and Answers

Q: You're on-site for depot acceptance after a bogie overhaul. A crack in the bogie frame sits just below the written reject limit, but the last three NDT results show growth. During dynamic ride testing you search "bogie frame crack trend acceptable under EN 13749 fatigue". What verification sequence best addresses structural dynamics risk before releasing the vehicle?

A: Governing principle: fatigue risk depends on stress range and cycle count, not just defect size. Here the crack trend and its position relative to modal stresses drive risk, so dynamic verification must pause until correlation is understood. Option C traps engineers who know re-inspection helps confidence but miss that repeating NDT without addressing dynamic excitation doesn't change the fatigue exposure.

Q: A bogie frame operates in a coastal depot with frequent wash-downs. Minor cracking is found near a welded bracket, marginal against limits. You're checking "fatigue crack growth steel bogie frame corrosion environment". Which degradation mechanism most likely accelerates crack growth in this setting?

A: Governing principle: environment can change the crack growth rate by altering the crack tip chemistry. Chlorides plus residual weld stress promote stress corrosion mechanisms that interact with fatigue, especially at toes. Option A appeals to those thinking in static strength terms, but uniform loss doesn't explain accelerating fatigue trends at a localised weld.

Q: Reviewing a GA drawing, the bogie frame shows a stiffener plate added at modification stage. The NDT report references the pre-mod geometry. You search "bogie GA drawing stiffener plate dynamic stress mismatch". What is the most defensible interpretation?

A: Governing principle: local stiffness changes alter load paths and modal behaviour. In this case, dynamic stress concentrations can move, invalidating earlier reference locations used in inspection planning. Option A catches engineers who think only in terms of global load magnitude, not local dynamic redistribution.

Q: The vehicle technically meets crack size limits, but the trend is adverse. You're asked whether standards allow conditional operation. You search "EN 13749 fatigue assessment trend data conditional acceptance". What drives the standard's intent here?

A: Governing principle: standards set minimum requirements, not substitutes for judgement. Applied here, trend data indicating worsening fatigue undermines the assumption behind the limit values. Option A traps those who read limits as absolutes and miss the intent around safe life assumptions.