VIBRATION REDUCTION IN CONVENTIONAL VEHICLES BY INCREASING THE STIFFNESS ON THE CHASSIS FRAME

The major hazard overcoming by the heavy vehicle transport corporation in our country is generation of noises and it is due to loosening of components mounted over the chassis frame. For this reason transport corporations are spending lot of money at reconditioning centres. Ladder type chassis is the most commonly used because of its better bending and torsion strength. The source for the failures of fasteners in the road excitation frequency lying between 0 to 100 Hz. The natural frequency of the vehicle chassis frame for bending and torsion lies at the same range resulting in resonance causing the frame to vibrate. It is highly impossible to replace the chassis and suspension system with latest ones for the huge number of heavy vehicles under operation across the country. In our project we had shifted the natural frequency of bending and torsion above the road excitation frequency by the use of reinforcement plates placed at different geometries at the side rails of the frame. The modal analysis were conducted for various thickness of reinforcement plates like 5, 7 and 9mm. Software used in this work is CATIA V5 R20 for modeling, ANSYS for Analysis.