Rapid transfer of energy to a mechanical system which results in significant increase in stress, velocity, acceleration or displacement within the system is called a shock.
Ek system ki natural frequency 200 Hz hai, matlab system apne aap 200 cycles per second mein vibrate karta hai jab usse disturb kiya jaye. Shock ke baare mein bolne ke liye hum yeh dekhte hain:
Shock kab kaha jata hai?
- Sudden aur High-Intensity Input: Shock tab kaha jata hai jab system ko ek sudden, high-magnitude force ya disturbance mile, jo bohot short time (usually milliseconds ya usse bhi kam) mein hota hai. For example, agar system pe koi heavy object drop ho ya koi sudden impact (jaise hammer strike) ho, toh yeh shock kehlata hai.
- Time Duration: Shock ka input time bohot chhota hota hai compared to system ke natural period (1/frequency). Natural frequency 200 Hz hai, toh natural period = 1/200 = 0.005 seconds (5 milliseconds). Agar disturbance isse bhi chhote time mein hota hai (e.g., 1-2 milliseconds), toh hum use shock bolenge.
- Effect on System: Shock ke wajah se system apni natural frequency (200 Hz) pe oscillate karna shuru kar deta hai. Agar shock ka energy ya frequency components natural frequency ke close hote hain, toh resonance ho sakta hai, jisse vibrations bohot intense ho jate hain.
Kab bolenge ki shock laga hai?
- Jab koi external force ya impact bohot tezi se (short duration, jaise <5 ms) system pe act kare.
- Agar system is force ke baad apni natural frequency (200 Hz) pe vibrate karne lage.
- Example: Agar ek machine (jiski natural frequency 200 Hz hai) pe koi sudden mechanical hit ho, ya usse drop kiya jaye, aur woh tezi se vibrate kare, toh hum bolenge ki system ko shock laga hai.
Simple Check:
- Agar disturbance ka time period natural period (0.005 s) se chhota hai aur amplitude high hai, toh shock hai.
- Agar system ke vibrations 200 Hz ke close dikh rahe hain post-impact, toh confirm hota hai ki shock laga.
Toh, system ko shock tab kaha jayega jab ek high-intensity, short-duration force lage, aur system uske baad apni natural frequency (200 Hz) pe oscillate kare.