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Hybrid methodology using balancing optimization and vibration analysis to suppress vibrations in a double crank-rocker engine
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Universiti Teknologi Petronas (UTP), Department of Mechanical Engineering, 32610 Bandar Seri Iskandar, Perak, Malaysia
Publication date: 2022-03-31
Eksploatacja i Niezawodność – Maintenance and Reliability 2022;24(1):53-61
  • A combination of balancing and vibration analysis is introduced for engine evaluation.
  • Variable speed balancing optimization was conducted for reliable results within speed range.
  • Vibration analysis was performed in frequency and time domain for comparison and verification.
  • Vibration analysis operates as a monitoring tool for engine balancing process outcome.
This study aims to present mathematical modelling to evaluate and analyze double crankrocker engine performance. The study suggests the use of two methods to reduce system vibration through balancing optimization and vibrational analysis. The combination of both methods acts as a verification method; besides it can be used as a tool for further system design enhancement and condition monitoring. The derived mathematical model is then used for balancing optimization to identify system shaking forces and moments, while variable speed is considered as an added parameter to evolve the optimization process. This factor shows better enhancement in reducing system shaking forces and moments compared to constant speed balancing method. Next, the system characteristics were concluded in terms of mode shapes and natural frequencies using modal and frequency response analysis, which give clear clue for secure system operational ground. Finally, the reduction in system vibrations was translated into engine’s centre of mass velocity, which evaluates balancing process effectiveness and indicate if further enhancement should be conducted.
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