Ride Response of a Model Vehicle to Harmonic Inputs.
STEVENS INST OF TECH HOBOKEN N J DAVIDSON LAB
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The document is concerned with vehicle response to harmonic inputs. The theories of mechanical vibrations and linear systems analysis are applied to one, two, and n-dimensional lumped-parameter systems to develop an orientation to the methods of obtaining theoretical system responses. Emphasis is placed on the system transfer function, the frequency and characteristic polynomials, and the steady-state response. Subsequently, the theoretical heave and pitch responses of the sprung mass of a vehicle traveling over a harmonic wave are obtained. The vehicle is represented as a four-dimensional lumped-parameter system and is subjected to a harmonic wave input of sufficient wavelength to allow continuous tire patch contact, but short enought to induce pitch motion. A one-eight scale model of some general vehicle is tested to determine its mass, inertia, damping, and spring parameters. The model is then run on a harmonic track no roll motion imparted, its heave and pitch accelerations of the sprung mass center of gravity measured, and a correlation made with the theoretical results. Author
- Surface Transportation and Equipment