In order to improve the comfort and perceptive quality of vehicle on the climate
conditions worldwide, the temperature effect on rattle and squeak of instrument
panel and console is studied under temperatures of −30°C, 23°C, and 60°C. First,
the modal accuracy of finite element model is certificated by real vehicle test.
The first global mode shapes are reciprocating rotation and reciprocating
translation for instrument panel and console, respectively, corresponding to
frequencies of 36.6 Hz and 29.6 Hz, which attain about 91% and 92.5% relative to
the experiment values. Second, on basis of the “3σ” threshold
of 0.27%, an assembly clearance in left instrument panel has non-negligible
rattle risk under all temperatures. Another three clearances have no rattle risk
but get rattle increase under temperatures of −30°C and 60°C. In addition, the
rattle risk is increased around console end clearances at the temperature of
60°C. In other cases, the rattle risk is 0% or can be neglected. Third, based on
the squeak threshold with an inverse of impulse rate gained from stick–slip
test, the maximal tangential relative displacements of some clearances are above
the corresponding thresholds under the temperatures of 23°C and 60°C,
illustrating squeak isn’t produced in low temperature, but become annoying to
people’s hearing as the temperature is increased. Moreover, there isn’t squeak
noise around armrest box due to acoustical compatibility of PP+EPDM+TD20 versus
PC_ABS in all temperatures.