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STRUCTURE-BORNE NOISE MODEL OF A SPUR GEAR PAIR WITH SURFACE UNDULATION AND SLIDING FRICTION AS EXCITATIONS

Jayasankaran, Kathik
http://rave.ohiolink.edu/etdc/view?acc_num=osu1269451200

Abstract Details

2010, Master of Science, Ohio State University, Mechanical Engineering.
This study presents an improved gear noise source model with surface undulation or roughness as the main excitation while taking into account the sliding frictional contacts between meshing teeth. This model extends the prior linear time-varying model that predicted the surface roughness-induced air-borne noise source. The structure-borne noise source is examined in this study by employing a six degree of freedom linear time-varying model. Gear contact mechanics is used to determine the mesh stiffness variation and also to relate the surface undulation to an equivalent static transmission error over a range of torques. Four alternate dynamic sliding friction models are also compared. Sound pressure radiated by the casing via structure-borne noise path is predicted using experimental partial pressure to acceleration transfer functions given pinion and gear accelerations in the line of action and the off-line of action direction. Linear time-invariant models are also developed by assuming that the mesh stiffness, moment arm and coefficient of friction do not vary with time. Sinusoidal, periodic and random tooth surface undulations are examined and sound pressures at gear mesh harmonics are predicted; the random undulation also generates off gear mesh frequency components. Both linear time-varying and linear time-invariant models are utilized to quantify the structure-borne noise sources and to understand the role of mesh stiffness, moment arm and coefficient of friction variations. The effects of torque, surface undulation amplitude, coefficient of friction and speed are also examined by using the linear-time varying model. Noise predictions (especially the trends) are compared with prior literature and some plausible explanations regarding the dominant sources are provided.
Dr. RAJENDRA SINGH (Advisor)
Dr. AHMET KAHRAMAN (Committee Member)
88 p.
Acoustics; Engineering; Mechanical Engineering
gear noise; surface undulation; static transmission error; mesh stiffness; random undulation; structure-borne; line of action; off-line of action; linear time-varying; linear time-invariant; sliding friction

Recommended Citations

Citations

  • Jayasankaran, K. (2010). STRUCTURE-BORNE NOISE MODEL OF A SPUR GEAR PAIR WITH SURFACE UNDULATION AND SLIDING FRICTION AS EXCITATIONS [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1269451200

    APA Style (7th edition)

  • Jayasankaran, Kathik. STRUCTURE-BORNE NOISE MODEL OF A SPUR GEAR PAIR WITH SURFACE UNDULATION AND SLIDING FRICTION AS EXCITATIONS. 2010. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1269451200.

    MLA Style (8th edition)

  • Jayasankaran, Kathik. "STRUCTURE-BORNE NOISE MODEL OF A SPUR GEAR PAIR WITH SURFACE UNDULATION AND SLIDING FRICTION AS EXCITATIONS." Master's thesis, Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1269451200

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.