Development of stiffness and structural damping measurement for rubber engine mount

Name: Thanitkit Waruttamaphanitchakul.

keyword: Rubber mounts.

LCSH: Rubber -- Engines.

LCSH: Rubber machinery industry.

Abstract: Rubber engine mount is one of the necessary parts in vehicle to gain superior comfort and prevent a damage that can occur in the other components. During the engine operation, engine mount is always subjected to the dynamics compression force from engine. The mount must be tough and remained in its elastic properties during the engine operation. It also has significant effect to passenger chamber in term of vibration and hardness while an engine is operated. To investigate this effect, properties of the Original-Equipment-Manufacturer (OEM)-mount and Non-Original-Equipment-Manufacturer (Non-OEM) mount were used. Both of them are sold in the market as aftermarket products for a long time without relevant researches based on those products. It was approved and found that either stiffness or damping coefficient is used in fatigue analysis and strength evaluation which are very important in design procedure to assure the reliability of the mount (1)(2). Besides, the structural damping is one of the easiest ways to analyze both the stiffness and the damping of rubber mount. It is because only displacement is required for an analysis instead of acceleration in other methods. This research was to investigate single mount properties with Single Degree of Freedom (SDOF) by using a test rig which consisted of accelerometers, force sensor, and dynamic excitation with sweep-sine signals. The excitation used the universal testing machine which generates the frequency between 0.5 and 100 Hz and pre-load 80 kg according to the engine and ASTM D5992-96 (2006)(3). As a result of test data, complex stiffness could be use to develop or to study the vibration that occurs in the engine.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Saiprasit Koetniyom

Role: Thesis advisor.

Email : saiprasit.k@tggs.kmutnb.ac.th

Name: Thira Jearsiripongkul

Role: Thesis advisor.

Email : jthira@engr.tu.ac.th

Created: 2012

Modified: 2021-02-23

Issued: 2021-02-23

eng

DegreeName: Master of science

Level: Master's Degree

Descipline: Automotive Engineering (International Program)

Grantor: King Mongkut's University of Technology North Bangkok

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