Page 120 - Singiresu S. Rao-Mechanical Vibrations in SI Units, Global Edition-Pearson (2017)

problems 117

Frame
Reciprocating
engine

Bolts
Elastic pad
Foundation
block

Soil
FiGure 1.63 A reciprocating engine on a foundation.

FiGure 1.64 A car moving on a rough road.

(suspension), main springs, and seats; and (c) damping of the seats, shock absorbers, and
tires. Develop three mathematical models of the system using a gradual refinement in the
modeling process.

1.5* The consequences of a head-on collision of two cars can be studied by considering the impact
of the car on a barrier, as shown in Fig. 1.65. Construct a mathematical model by consider-
ing the masses of the car body, engine, transmission, and suspension and the elasticity of the
bumpers, radiator, sheet metal body, driveline, and engine mounts.

FiGure 1.65 A car colliding with a barrier.