# Correspondence of shock and sine acceleration values

Question

What is the ratio between shock acceleration (it is not always specified) and sinusoidal acceleration?
How can Newton’s 2-nd law be applied in the case if there is no correlation between the specified 200N value (for the vibration exciter TV 51120) and the maximal shaker acceleration value of 98m/s2?

Should I use the formula  200=98×[suspension weight]?

What does the effective dynamic mass of 0,23 kg then stand for?

Answer

Relation of sine signal maximum acceleration value and the one of shock pulse is determined by shaker system structure and may correspond to the range of 20-300%. In the case, if the shaker system manufacturer has not explicitly specified the acceleration and force values for shock vibration tests performance, then one can use the values specified for sinusoidal vibration tests performance.

TV 51120 technical specifications contain the following information: “Effective moving mass – 0.23 kg”, which means that Newton’s 2-nd law is applicable, however, the effective moving mass value still has to be determined.

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