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Transmissibility is defined as
  • a)
    Ratio of force applied to the force transmitted to the foundation
  • b)
    Ratio of force transmitted to the foundation to the input force
  • c)
    Sum of the forces applied and the force transmitted to the foundation 
  • d)
    Difference of force applied vis-a-vis the force transmitted to the foundation
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Transmissibility is defined asa)Ratio of force applied to the force tr...
In vibration isolation system, the ratio of the force transmitted to the force applied is known as the isolation factor or transmissibility
then ϵ = 1 for all values of damping factor c/cc.
 
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Transmissibility is defined asa)Ratio of force applied to the force tr...
Transmissibility is defined as the ratio of force transmitted to the foundation to the input force.

Transmissibility is an important concept in mechanical engineering that helps us understand the efficiency of force transmission from a source to a foundation. It is commonly used in the analysis and design of various mechanical systems, such as vibration isolation systems, to ensure that the forces applied are effectively transmitted without unnecessary losses.

Explanation:

Transmissibility is defined as the ratio of the force transmitted to the foundation to the input force. In other words, it quantifies how much force is actually transmitted to the foundation compared to the force applied to the system.

To better understand this concept, let's consider a simple example of a vibration isolation system. In such a system, the input force may be generated by a vibrating machine, and the goal is to minimize the transmission of vibrations to the foundation or surrounding structures.

When the input force is applied to the system, some of it gets transmitted to the foundation, and the rest may be dissipated or absorbed by the system itself. The transmissibility of the system tells us how efficient it is in transmitting the force to the foundation.

Mathematically, transmissibility is expressed as:
Transmissibility = Force Transmitted to Foundation / Input Force

For example, let's say we have an input force of 1000 N applied to a vibration isolation system. After analyzing the system, we find that only 800 N of force is transmitted to the foundation. In this case, the transmissibility would be 800 N / 1000 N = 0.8.

A transmissibility value of less than 1 indicates that there is some loss or attenuation of force during transmission. This loss can be due to various factors such as damping, flexibility, or resonance within the system. On the other hand, a transmissibility value of 1 would mean that all of the input force is effectively transmitted to the foundation.

Importance of Transmissibility:

Transmissibility is an important parameter in mechanical engineering because it helps in designing and optimizing systems for efficient force transmission. By understanding the transmissibility of a system, engineers can make informed decisions about the design parameters such as stiffness, damping, or isolation elements to achieve the desired level of force transmission.

In practical applications, such as isolating vibrations from sensitive equipment or reducing the impact of seismic forces on structures, it is crucial to have a low transmissibility value. This ensures that the majority of the force is effectively transmitted to the foundation, minimizing the potential damage or disruption caused by vibrations or external forces.

In conclusion, transmissibility is defined as the ratio of force transmitted to the foundation to the input force. It is an important concept in mechanical engineering that helps in designing and optimizing systems for efficient force transmission. By understanding and analyzing the transmissibility of a system, engineers can make informed decisions to achieve desired levels of force transmission and minimize potential damage or disruption.
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Transmissibility is defined asa)Ratio of force applied to the force transmitted to the foundationb)Ratio of force transmitted to the foundation to the input forcec)Sum of the forces applied and the force transmitted to the foundationd)Difference of force applied vis-a-vis the force transmitted to the foundationCorrect answer is option 'B'. Can you explain this answer?
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