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Investigation of forced frequency in a commercial vehicle suspension system

Kumar S. D., Kumar S. S., Kumar K. A.

Mechanics and Mechanical Engineering

2018

Vol. 22, nr 4

967--974

Vehicle suspension plays a vital role in maintaining the center of gravity to achieve perfect balancing of the vehicle to provide the comfortable ride. While designing the suspension system of automobile, vibration is the main aspect to be considered. This paper aims to analyze the automobile front and rear suspension for a four wheeler using analytical and numerical approach. Existing details of the suspension is collected using the concept of reverse engineering. Natural and forced frequency of the front and rear suspension system is calculated theoretically based on the collected data's. The natural frequency and forced frequency is numerically computed for front and rear suspension. The amplitude of vibration is reduced by replacing the spring material and its forced frequency is reduced by 1.18% and 1.56% for front and rear suspension system respectively. This result reveals that low carbon steel has ability to reduce the forcing frequency and can produce comfort ride.

A new approach to the determination of the number of oxo groups in carbonyl compounds using the chloramine-T oxidative method

Umesha K. B., Rai K. M. L., Kumar K. A., Prasad K. R., Shashikanth S.

Chemia Analityczna

2001

Vol. 46, No. 2

269-274

A simple titrimetric method for the determination of the number of the oxo groups in car-bonyl compounds via their oximes is described. The method involves the oxidative dehydrogenation of the oximes by chloramine-T in water, followed by the iodometric determination of the unreacted chloramine-T.

Opisano prostą metodę oznaczania liczby grup C=O w związkach karbonylowych na drodze tworzenia oksymów. Metoda polega na utleniającym odwodnieniu oksymów w wodzie za pomocą chloraminy T, a następnie na jodometrycznym oznaczeniu nie-przereagowanej chloraminy T.