Mechanical vibrations homeworks

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SUMMARY

The discussion focuses on solving a mechanical vibrations homework problem involving a 1 kg slider and a beam with a mass of 3 kg, where the system's oscillation period is given as 0.9 seconds. The spring stiffness is specified as 75 N/m. Participants are tasked with formulating the ordinary differential equation (ODE) that incorporates the rotational moment of inertia, spring constant, and the unknown distance x from the axis of variation O. The goal is to derive the relationship between x and the desired oscillation period.

PREREQUISITES
  • Understanding of ordinary differential equations (ODEs)
  • Familiarity with mechanical vibrations and oscillation theory
  • Knowledge of rotational dynamics and moment of inertia
  • Basic principles of spring mechanics and stiffness
NEXT STEPS
  • Derive the ordinary differential equation for the system using the given parameters
  • Calculate the moment of inertia for the slider-beam system
  • Analyze the relationship between frequency and distance x
  • Use the derived ODE to solve for x that satisfies the period of 0.9 seconds
USEFUL FOR

Students and professionals in mechanical engineering, particularly those studying dynamics and vibrations, as well as anyone involved in solving mechanical systems involving oscillations.

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Homework Statement



1.png


what distance x from the axis of variation O should be 1 kg
slider, the system oscillations period is 0.9 s?

T=0.9 s;
the spring stiffness k=75 N/m;
slider mass m=1 kg;
beam mass m=3 kg;

Homework Equations


I[itex]\varphi[/itex](over letter "..")+k[itex]\varphi[/itex]=0
[itex]\varphi[/itex](over letter "..")+[itex]\omega[/itex]^2[itex]\varphi[/itex]=0


The Attempt at a Solution



I have no solution. Please help me to find solution. Thanks.
 
Physics news on Phys.org
Can you write the ordinary differential equation that describes the system in terms of rotational moment of inertia, time, spring constant, and dimenions? The moment of inertia of the system will contain an unknown distance x. Once you put the ODE in correct form, you can identify the frequency of vibration. It will contain x. Then find x such that you get the period you seek.
 

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