Effect of using a Dynamic Absorber On Vibrations of an Opposed-Piston Ultralight Aircraft Engine

Document Type : Original Article


Department of Mechanical Engineering, University of Imam Hossein comprehensive, Iran


In this paper, vibrations reduction of piston engine of ultralight aircrafts was studied with considering a combination of experimental, analytical and numerical methods. Analytical equations of dynamic absorber were obtained. Afterward, experimental test was used to determine the system torque. Due to the difficulty of obtaining experimental data, the amount of angular acceleration and then velocity and angular displacement were calculated numerically using MATLAB software and verified with experimental results with a difference of less than 2%. Different components of the system were designed with reverse engineering method using SolidWorks software. After data transmission to Adams software, vibrational analysis of the system was performed and validated with analytical results with a difference of less than 1.91%. A suitable dynamic absorber was selected. The results showed that engine vibrations is reduced up to 40%.


[1]     Feyzi, T., Tikani, R., Esfahanian, M., and Ziaei Rad, S., Performance Analysis of Different Modified Mr Engines Mounts, Journal of Solid Mechanics, 2011.
[2]     Taylor, C. F., Aircraft Propulsion, Smithsonian Annals of Flight, Vol. 1, No. 4, 1971.
[3]     Lee, E. C., Nian, C. Y., and Tarng, Y. S., Design of a Dynamic Vibration Absorber Against Vibrations in Turning Operations, Journal of Materials Processing Technology, Vol. 108, No. 3, 2001, pp. 278–285.
[4]     Higashi, K., Okamoto, S., Nagano, and H., Yamada, Y., Effects of Mechanical Parameters on Hardness Experienced by Damped Natural Vibration Stimulation, 2015.
[5]     Mousavi, S. A., Rahmani, M., Kaffash Mirzarahimi, M., and Mahjoub Moghadas, S., The Dynamic and Vibration Response of Composite Cylindrical Shell Under Thermal Shock and Mild Heat Field, Journal of Solid Mechanics, Vol. 12, No. 1, 2020, pp. 175–188.
[6]     Ryabov, I. M, Chernyshov, K. V., Pozdeev, Comparative Evaluation of the Vibration Isolation Properties of a Suspension with Different Flywheel Dynamical Absorbers of the Car Body Oscillations,  Procedia Engineering, Vol. 129, 2015, pp. 480–487.
[7]     Simakov, O. B., Mikhalkin, I. K., and Ponomarev, Y. K., Experimental Research of Ultra Small Vibration Dampers for Protection Against Vibration of Memory Units in Automatic on-board Systems on Vehicles, Procedia Engineering, Vol. 176, 2017, pp. 429–437.
[8]     Genta, G., On the Stability of Rotating Blade Arrays, Journal of Sound and Vibration, Vol. 273, No. 4–5, 2004, pp. 805–836.
[9]     Genta, G., Feng, C., and Tonoli, A., Dynamics Behavior of Rotating Bladed Discs: A Finite Element Formulation For The Study of Second And Higher Order Harmonics, Journal of Sound and Vibration, Vol. 329, No. 25, 2010, pp. 5289–5306.
[10]  Lin, S. M., Lee, S. Y., and Wang, W. R., Dynamic Analysis of Rotating Damped Beams with an Elastically Restrained Root, International Journal of Mechanical Sciences, Vol. 46, No. 5, 2004, pp. 673–693.
[11]  Rao, S. S., Yap, F. F., Mechanical Vibrations. Singapore: Pearson Education Inc, 2010.
[12]  Turhan, Ö., Bulut, G., Linearly Coupled Shaft-Torsional and Blade-Bending Vibrations in Multi-Stage Rotor-Blade Systems, Journal of Sound and Vibration. Vol. 296, No. 1–2, 2006, pp. 292–318.
[13]  Yang, C. H., Huang, S. C., The Influence of Disk’s Flexibility on Coupling Vibration of Shaft-Disk-Blades Systems, Journal of Sound and Vibration, Vol. 301, No. 1–2, 2007, pp. 1–17.
[14]  Mohtasebi, S. S., Afshari, H., and Mobli, H., Analysis of Crankshafts Vibrations to Compare the Dynamic Behavior, Journal of Applied Sciences, Vol. 6, No. 3, 2006, pp. 591–594.
[15]  Hu, X., Sun, Q., Li, G., and Bai, S., Numerical Investigation of Thermo-Hydraulic Performance of an Opposed Piston Opposed Cylinder Engine Water Jacket with Helical Fins, Applied Thermal Engineering, 2019.
[16]  Gao, J., Tian, G., Jenner, P., and Burgess, M., Intake Characteristics and Pumping Loss in The Intake Stroke of a Novel Small Scale Opposed Rotary Piston Engine, Journal of Cleaner Production, 2020.
[17]  Lu, X., Zhang, F., Liu, Y., and Wang, S., Analysis on Influences of Scavenging Ports Width to Scavenging Process Based on Opposed Piston Two Stroke Diesel Engine, In: Energy Procedia, 2019.
[18]  Liu, Y., Zhang, F., Zhao, Z., Cui, T., Zuo, Z., and Zhang, S., The Effects of Pressure Difference on Opposed Piston Two Stroke Diesel Engine Scavenging Process, In: Energy Procedia, 2017.
[19]  Grabowski, Pietrykowski, K., and KarpiƄski, P., The Zero-Dimensional Model of the Scavenging Process in the Opposed-Piston Two-Stroke Aircraft Diesel Engine, Propulsion and Power Research, 2019.
[20]  Hua, Y., Wong, W., and Cheng, L., Optimal Design of a Beam-Based Dynamic Vibration Absorber Using Fixed-Points Theory, Journal of Sound and Vibration, Vol. 421, 2018, pp. 111–131.
[21]  Fischer, O., Wind-Excited Vibrations—Solution by Passive Dynamic Vibration Absorbers of Different Types, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 95, No. 9–11, 2007, pp. 1028–1039.
[22]  Taghipour, J., Dardel, M., and Pashaei, M. H., Vibration Mitigation of a Nonlinear Rotor System with Linear and Nonlinear Vibration Absorbers, Mechanism and Machine Theory, Vol. 128, 2018, pp. 586–615.
[23]  Hafezalkotob, A., Hafezalkotob, A., Risk-Based Material Selection Process Supported on Information Theory: a Case Study on Industrial Gas Turbine, Applied Soft Computing, Vol. 52, 2017, pp. 1116–1129.
[24]  Lee, C. Y., Lin, J. H., Incorporating Piezoelectric Energy Harvester in Tunable Vibration Absorber for Application in Multi-Modal Vibration Reduction of a Platform Structure, Journal of Sound and Vibration. Vol. 389, 2017, pp. 73–88.
[25]  Ibrahim, R. A., Recent Advances in Nonlinear Passive Vibration Isolators, Journal of Sound and Vibration, Vol. 314, No. 3–5, 2008, pp. 371–452.
[26]  Hemati, Tajdari, and Khoogar, Roll Vibration Control for a Full vehicle Model Using Vibration Absorber, International Journal of Automotive Engineering, Vol. 3, No. 4, 2013.
[27]  Marzbanrad, J., Jamali, and Shakhlavi, S., A Biomechanical Modeling of an Automotive Passenger Body to Investigate the Vertical Vibration in Various Road Profiles Using Transmissibility Analysis, International Journal of Automotive Engineering, Vol. 7, No. 1, 2017.
[28]  Mahjoub-Moghadas, S., Internal Combustion Engines Control And Diagnostics Through Instantaneous Speed Of Rotation Analysis, Thesis Of PHD, L'ensam-Paris, 1985.
[29]  Najafzadeh, M., Fault Control and Detection in Internal Combustion Engines Through Angular Velocity and Vibration Analysis, 2007.