HARMONIC VIBRATION ANALYSIS OF 2-WHEELER TAIL LAMP TO GET THE PARTICULAR RESPONSE ON THE CENTRE OF LENS AND CORRELATION WITH PHYSICAL TEST RESULTS

Automotive components undergo various loadings in different conditions during operation. So, every component must be designed according to its assurance of withstanding the certain and uncertain loads as well. Tail lamp is one of the components which may not take any structural forces but must be designed precisely to resist the vibration coming from the engine and road. Harmonic simulation helps to verify the design of tail lamp for given excitation and fixed testing range of frequencies. Apart from this, OEM companies demand the testing of tail lamp to get the particular G level response on the center of lens of the assembly and accordingly the inputs have to be defined. This paper demonstrates the harmonic simulation of the 2-wheeler tail lamp to maintain the 15G acceleration response on the center of lens. For this, calculation of input acceleration for given frequency range is important. This is carried out by using response from the preliminary simulation where constant acceleration is applied at the mountings of the lamp. Then further it is used to calculate the input acceleration values required to maintain the 15G response at the center of the lens. In the physical testing, same calculations are taken care by the feedback system. In this the control sensor (accelerometer) is placed on the center of the lens. This generates the feedback which further used to adjust the input acceleration for getting the 15G response on the lens. Post the test, tail lamp is checked for any mechanical failure, cracks, or powder formation.