A Member of the Teaching staff in the Department of Materials Engineering / University of Technology receives a Ph.D Prof. Dr. Jabbar Hussein Muhammad Al-Sabba ,a teaching staff in the Department of Materials Engineering/University of Technology, received a Ph.D. for his thesis titled:
Vibration Suppression of a Pipe Conveying Fluid Using Shape Memory Alloy
Where the discussion took place in Dr. Jawamir's Hall in the Mechanical Engineering Department on Sunday, 7/3/2022 at nine in the morning, and the discussion committee consisted of Messrs.
1. Prof. Dr. Ahmed Abdullah Al-Rajhi, Chairman
2. Asst. Prof Dr. Muhammad Idris Mohsen Member
3. Asst. Prof .Dr. Mohsen Nouri Hamza Member
4. Asst. Prof .Dr Wedad Ibrahim Majeed is a member
5.Asst. Prof .Dr. Wafaa Abdel Saud Member
6. Prof.Dr. Mowaffaq Ali Tawfiq Supervisor
7. Asst. Prof .Dr. Qassem Abbas Attia Supervisor
After the discussion committee recorded their observations on the thesis, upon explanation and correction and after the Researcher’s defense on his thesis and the end of the discussion, the committee decided to accept the thesis, and decided to grant the researcher a doctorate degree with a Pass grade.
Abstract
This thesis lies in two main parts; experimental and analytical work. In the first part, an analytical model was prepared to analyze and calculate the dynamic behavior of the random copolymer polypropylene pipe (PP-R) conveying fluid, using Integrated Transformation Techniques (ITT). In the second part, a semi-active control system was designed using Proportional-Integral-Derivative (PID) controller, by employing the shape memory alloy (SMA) wires, made of nickel titanium alloy (Nitinol), to mitigate the vibration of the pipes caused by the fluid flowing inside them. The results demonstrated that there was a large increase in pipe deflection and a significant decrease in natural frequency with increasing temperature and aspect ratio under different fluid velocities. The results manifested that there is a reduction in the level of vibration (about 75%) was obtained by thermal activation of the shape memory wires which leads to alter the dynamic response of the pipe.
