Analysis of Subharmonic Torsional Resonance in Powertrains with Two-Stage Spring Isolators Allison Transmission Incorporated

Format:

Book

Conference/Event

Author/Creator:

Villiger, Jacob, author.

Conference Name:

Noise & Vibration Conference & Exhibition (2025-05-12 : Grand Rapids, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

A vehicle powertrain system with a two-stage spring isolator separating a combustion engine from a transmission can exhibit significant nonlinear dynamics if the input torques cause the spring to continuously alternate between its first-stage and second-stage stiffnesses. In particular, this nonlinearity can result in subharmonic resonance of the system's natural frequencies at half the frequency of the engine's primary excitation order. A 1D torsional vibration model was prepared using Siemens's Simcenter Amesim software to study these nonlinear vibrations. First, a correlated vehicle-level model was developed to replicate a half-order torsional resonance that was measured in a test of a research vehicle. Then, simplified theoretical models were used to study and demonstrate the sensitivity of this kind of subharmonic resonant response to changes in mean input torque level, amplitude of input torque oscillation, first-stage capacity of the spring isolator, and other factors

Notes:

Vendor supplied data

Publisher Number:

2025-01-0096

Access Restriction:

Restricted for use by site license