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Keywords: vibrations
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Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2012, 134(1): 011007.
Published Online: January 4, 2012
..., non-smooth paths. Such paths can be traced by rigid-body or partially compliant mechanisms as well but the complexity, bulkiness and the presence of hinges is a disadvantage in terms of increased friction, backlash, need for lubrication, noise, and vibrations. In designing CCMs, both curved frame...
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. December 2011, 133(12): 124501.
Published Online: December 9, 2011
... using standard identities in spherical geometry. The resulting dynamic model then informs a basic conceptual design optimization, which object is intended to reduce induced driveline vibrations, when the coupling is articulated at nonzero angles of torque transmission. 19 11 2009 14 09 2011...
Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2011, 133(11): 111002.
Published Online: November 11, 2011
... micromechanical devices torque vibrations microelectromechanical systems (MEMS) microgyroscope comb-drive actuator MetalMUMPs finite element method (FEM) A vibratory microgyroscope operates on the Coriolis effect, where a rotation induced energy transfer occurs between two vibration modes...
Journal Articles
Article Type: Research Papers
J. Mech. Des. June 2011, 133(6): 061011.
Published Online: June 21, 2011
...Dario Richiedei; Alberto Trevisani; Gabriele Zanardo This paper introduces a general and flexible design method for the inverse modal optimization of undamped vibrating systems, i.e., for the computation of mass and stiffness linear modifications ensuring the desired system eigenstructure...
Journal Articles
Article Type: Research Papers
J. Mech. Des. June 2011, 133(6): 061004.
Published Online: June 15, 2011
...Liu Dawei; Ren Tingzhi In order to obtain the nonsinusoidal oscillation wave of continuous caster molds, a vibration generator comprised of an eccentric shaft and a new kind of noncircular gears called deformed limacon gear pair is proposed. The pitch curve equations of limacon gears are described...
Journal Articles
Article Type: Research Papers
J. Mech. Des. September 2010, 132(9): 091001.
Published Online: August 30, 2010
...A Zachary Trimble; Jeffrey H. Lang; Jahir Pabon; Alexander Slocum A new device designed to harvest rotational vibration energy is presented. The device is modeled as a spring-mass-damper system connected to a vibration source where a torsion rod is used as a spring element and a shearing...
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. March 2010, 132(3): 034501.
Published Online: March 1, 2010
...Shuyun Jiang; Shufei Zheng This technical brief presents a dynamic model based on the traditional transfer matrix method (TMM) and Jones–Harris nonlinear rolling bearing model to study the effects of the extended structure parameters on the vibration behavior of a high-speed motorized spindle...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2010, 132(1): 011010.
Published Online: December 31, 2009
...A. Artoni; M. Kolivand; A. Kahraman Loaded transmission error (LTE) is one of the primary sources of gear noise and vibration. While ease-off topography has been shown to be powerful in improving the contact properties of a gear drive, its optimization to minimize LTEs has been an open problem...
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. November 2009, 131(11): 114501.
Published Online: October 6, 2009
... stiffness and bearing compliance, and the work from input torque. From the resultant governing equations, the natural frequencies and modes of interest are calculated, and the effect of bearing stiffness on those modes is examined. The rotational vibrations of the sun gears as well as the tooth contact...
Journal Articles
Article Type: Research Papers
J. Mech. Des. October 2009, 131(10): 101003.
Published Online: September 2, 2009
... representatives of all gear teeth because errors may occur in assembly procedure and affect tooth contact condition. Frequently, tooth surface measuring data cannot show contact condition and used to predict gear vibration accurately. Field inspection method whose measured results relate directly to the meshing...
Journal Articles
Article Type: Research Papers
J. Mech. Des. September 2009, 131(9): 091008.
Published Online: August 18, 2009
.... In addition, the effect of the capacitance of the rectifier circuit on charging time was also investigated. Finally, the EH was also used to drive an accelerometer using only energy that was harvested from ambient vibration. The accelerometer was continuously and successfully operated when the persistent...
Journal Articles
Article Type: Research Papers
J. Mech. Des. July 2009, 131(7): 071009.
Published Online: June 25, 2009
.... The outer loop calculates multiple most probable points (MPPs), which are commonly encountered in vibration problems. The dominant MPPs with the highest contribution to the probability of failure are identified. A niching GA is used because of its ability to simultaneously identify multiple solutions. All...
Journal Articles
Article Type: Research Papers
J. Mech. Des. July 2009, 131(7): 071002.
Published Online: May 27, 2009
..., and fasteners are modeled as pure springs. Rigid components are modeled as lumped masses. The proposed screw-nut interface model, which includes the effects of lateral vibrations, is shown to predict the coupling between axial, torsional, and lateral dynamics of ball screw drives. The effects of this dynamic...
Journal Articles
Article Type: Research Papers
J. Mech. Des. June 2009, 131(6): 061015.
Published Online: May 21, 2009
...Edzrol Niza Mohamad; Masaharu Komori; Hiroaki Murakami; Aizoh Kubo; Suping Fang The vibration/noise of power transmission gears is a serious problem for vehicles including automobiles, and therefore many studies on gear vibration have been reported. These studies, however, were carried out...
Journal Articles
Article Type: Research Papers
J. Mech. Des. May 2009, 131(5): 051007.
Published Online: April 6, 2009
... simulation of one design. The methodology is demonstrated on probabilistic vibration analysis and reliability-based design optimization of a realistic vehicle model. It is shown that the computational cost of the proposed re-analysis method for a single reliability analysis is about 1/20 of the cost...
Journal Articles
Article Type: Research Papers
J. Mech. Des. April 2009, 131(4): 041006.
Published Online: March 23, 2009
...Masaharu Komori; Haixiang Li; Fumi Takeoka; Sonko Osawa; Osamu Sato; Takashi Kiten; Daisuke Shirasaki; Yohan Kondo The strength and vibration/noise of gears are influenced by the pitch deviation of micrometer order and therefore, advanced quality control is needed in gear manufacturing processes...
Journal Articles
Article Type: Research Papers
J. Mech. Des. April 2009, 131(4): 041003.
Published Online: March 20, 2009
...J. K. Jiang; Y. R. Iwai This paper presents an improved method for dynamically-compensated (tuned) cam design by minimizing or restricting vibrations in high-speed cam-follower systems. Using this approach, cams can be synthesized with a variety of design requirements and reduced residual...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2009, 131(1): 011009.
Published Online: December 15, 2008
...Bokman Lim; Frank C. Park One means of designing reduced vibration mechanisms is to ensure that the mechanism’s natural frequency be sufficiently greater than the driving frequencies of the actuators. In this paper we consider the problem of determining a mechanism’s mass, inertial, and joint...
Journal Articles
Article Type: Research Papers
J. Mech. Des. December 2008, 130(12): 121402.
Published Online: October 21, 2008
...Gang Liu; Robert G. Parker This work studies the effects of tooth profile modification on multimesh gearset vibration. The nonlinear analytical model considers the dynamic load distribution between the individual gear teeth and the influence of variable mesh stiffnesses, profile modifications...
Journal Articles
Article Type: Research Papers
J. Mech. Des. October 2008, 130(10): 101101.
Published Online: September 10, 2008
... the vibratory behavior, and produces an animation of that behavior by directly animating the user’s sketch. Our user studies have shown that our parsing and recognition algorithms work well even for novice users. While our software is not a comprehensive vibration analysis tool, it is one step toward our vision...