General Studies · Mechanical Vibrations

Consider the following statements regarding machine vibration and isolation: 1. If the mechanical stresses are below the acceptable safe working stress levels of the materials involved, no direct vibration protection methods are strictly required. 2. If the stresses exceed safe levels, corrective measures such as stiffening, reduction of inertia and bending moment effects, incorporation of support members, or use of isolators may be required. 3. Shock isolators differ from vibration isolators in that shock isolation typically requires a stiffer spring and yields a higher natural frequency for the resilient element compared to continuous vibration isolation. Which of the above statements are correct?