- Q3 A Fixe Sprinkler Pump Is Installed On The Basement Floor Of A Building Which Can Be Modeled As A Rigid Rectangular 1 (271.56 KiB) Viewed 38 times
Q3. A fixe sprinkler pump is installed on the basement floor of a building, which can be modeled as a rigid rectangular plate resting on four clastio columns as shown in Figare Q3. The equivalent mass of the sprinkler pump is m1 of 150×P kg and it is observed to vibrate badly at a frequency of 10 Hz. The vibration is caused by the application of a harmonic force, F of 100×0 N to the pump. A hypothesis was made by a mechanical engincer that the excessive vibration is due to the frequency of the harmonic force which coincides with the natural frequency of the sprinkier pump. (a) Based on the hypothesis made by the engineer, suggest the possible solution to overcome the vibration problem. Please give a reason to support your answer. (4 marks) (b) If the sprinkler pump can be modeled as a single degree of freedom spring-mass system, calculate the stiffness, k for cach elastic column possessed. Give the final answer in the unit of kN. (6 marks ) 4 CONFIDENTIAL. CONFIDENTIAL (f. Inaithin) (1-1nither