Unit
- Course
- Mechanical engineering
- Study-unit Code
- 70025309
- Curriculum
- Costruzioni
- Teacher
- Filippo Cianetti
- Teachers
-
- Filippo Cianetti
- Hours
- 88 ore - Filippo Cianetti
- CFU
- 11
- Course Regulation
- Coorte 2021
- Offered
- 2022/23
- Learning activities
- Caratterizzante
- Area
- Ingegneria meccanica
- Academic discipline
- ING-IND/14
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- The teaching of "Design in Dynamic Range" is proposed to apply the theoretical tools acquired in the course "Design and Construction of Machines" to the design of machine elements operating in dynamic range and subjected to fatigue design, object of the course "Machine Design" by extending the study to the dynamic behavior in time and frequency domain.
- Reference texts
- Lecture notes of “Progettazione e Costruzione di Macchine” (Prof. Braccesi)
Shigley J.E., Mischke C.R., “Mechanical Engineering Design”, Ed. McGraw-Hill, Inc.
Collins J.A., “Failure Of Materials In Mechanical Design”, John Wiley & Sons
S. Timoshenko, “Vibration Problems in Engineering”, John Wiley & Sons Inc , March 1990
Dahlberg T., Ekberg A., ”Failure Fracture Fatigue: An Introduction”, Studentlitteratur, Lund
Matlab and ANSYS manuals - Educational objectives
- The student will have to demonstrate how to apply the theoretical tools acquired during "Progettazione e Costruzione di Macchines" to design dynamic machine elements and to gain insight into the fatigue design issues that are the subject of "Costruzione di Macchine" extending the study to dynamic behavior in the domains of time and of frequency.
- Prerequisites
- It is requested to pass the test of "Progettazione e Costruzione di Macchine"
- Teaching methods
- The course will be held by conducting frontal lessons
- Other information
- -
- Learning verification modality
- Oral examination
- Extended program
- Signal analysis. Random processes and power spectral density (PSD). Theoretical definitions. Dynamic analysis. Modeling and dynamic simulation in the state space form: systems with one, two and n degrees of freedom (quarter car), state space modeling of systems modeled with modal approach. Integration of the theory of structural dynamics to the application of basemotion. Dynamic analysis in frequency domain with PSD systems MiMo approach. Techniques to obtain responses expressed in terms of PSD from inputs always expressed in terms of PSD and from the frequency response functions array of the system. FEM modeling and simulation. Structure of a generic finite element code, types of structural elements and analysis. Development of a finite element model, static analysis, modal analysis, construction of its representation in state space form, frequency analysis (frequency response and spectrum analysis) and transient analysis in MATLAB and ANSYS. Load spectra. Definition of load spectrum. Methods of cycles counting in time domain. Reconstruction of load spectra from PSD functions in frequency domain. Dirlik formula. Evaluation of equivalent load spectra.