From C matrix,
?1 + ?2 = 15
?2 = 5 => ?1 = 10
?3 = 15
From K matrix,
K1 + K2 = 140
K2 = 60 => K1 = 80
K3 = 40
From M matrix
m1 = 1
m2 = 2
m3 = 3
?1 = ?1/(2√m1K1) = 10/(2*√140) = 5/2√35 = 0.4226
?2 = ?2/(2√m2K2) = 5/(2*√120) = 5/4√30 = 0.2282
?3 = ?3/(2√m3K3) = 15/(2*√120) = 15/4√30 = 0.6847
(QUESTION 5] (10 Points) Consider a linear system with three degrees of freedom. In matrix form,...
For the system shown in Figure 5, a. How many degrees of freedom is this system and why? (5) b. If x3-0 (the upper end is fixed and K1 and K2=K (5) Write the equations of motion. Set the necessary matrix to find the natural frequencies and mode shapes Determine and explain how to get the natural frequencies 1. (5) (5) 2. 3. Figure 5 ww ww-
For the system shown in Figure 5, a. How many degrees of freedom...
Problem 5 (20%) For the system shown in Figure 5, a. How many degrees of freedom is this system and why? (5) b. If x3 0 (the upper end is fixed and K1 and K2=K Write the equations of motion. Set the necessary matrix to find the natural frequencies and mode shapes (5) (5) (5) 1. 2. 3. Determine and explain how to get the natural frequencies. m2 Figure 5 www
Problem 5 (20%) For the system shown in Figure...
Single Degree of Freedom -Free Damped Vibration of Machines and Vibrations problem shows a lever with spring, mass and damper system. The lever has a moment p9 shows a lever with Agure so kgm2 pivoted at point O with a pulley of mass 4 kg with a radius r-0.5 m Vibration and and load mp4 kg. The load stioping between the puiley and cable supporting the load m. The stiffiess coefficient sippie spring isk=2x105 N/m. Calculate the following when the...
Consider a single degree of freedom (SDOF) with mass-spring-damper system subjected to harmonic excitation having the following characteristics: Mass, m = 850 kg; stiffness, k = 80 kN/m; damping constant, c = 2000 N.s/m, forcing function amplitude, f0 = 5 N; forcing frequency, ωt = 30 rad/s. (a) Calculate the steady-state response of the system and state whether the system is underdamped, critically damped, or overdamped. (b) What happen to the steady-state response when the damping is increased to 18000 N.s/m? (Hint: Determine...
Problem 7: Consider the two-degrees of freedom system shown in the figure below, where each disk is pivoted at its mass center. The inputs are the torques τι and T2 applied to the pivot points. At t = 0, θί-B2 = τι-T2-0, and each linear spring is at its free length (undeformed). Find the equivalent inertia (la) and stiffness (K matrix T1 T2 02 J2, r2
The equations of motion for a certain mechanical system with two degrees of freedom, can be written as a pair of coupled, second-order, differential equations: (M + m)x - 1/2 mL theta^2 sin(theta) + 1/2 mL theta cos(theta) + k(x - L_0) = 0 1/3 mL^2 theta + 1/2 mLx cos(theta) + 1/2 mgLsin(theta) = 0 We can rewrite them in matrix form, A*qdd - b, to be solved simultaneously: [M + m 1/2 mL cos theta 1/2 mL cos...
MEMB343 MECHANICAL VIBRATIONS ASSIGNMENT l. For the system shown in Figure 1, where mi=5 kg, m,-10 kg, ki=1000 N/m, k2-500 N/m, k, 2000 N/m, fi-100sin(15t) N and f-0, use modal analysis to determine the amplitudes of masses m, and m2. The equations of motion are given as sin(15t), wth natura frequencies 5 01[i, 0 10 500-500x, 500 2500jx, x,[100 ω,-14.14 rad's and a, = 18.71 rad/s, and mode shapes, Φ',, and Φ' k, Im Figure 1
MEMB343 MECHANICAL VIBRATIONS ASSIGNMENT...
I. COUPLED OSCILLATIONS Consider the system below with two degrees of freedom (neglect gravitation). Denote the displacement of each of the particles with respect to equilibrium by óy (t), i= 1,2. 1. Find the Lagrangian describing the system 2. Write down the coupled equations of motion for óyn (t) and by2(t) 3. Find the 2 x 2 matrices Ť and V and solve the normal mode equation for w: det(V-2T) 0. 4. Compute the form of the eigenvectors (normal modes),...
5. Consider the following time-dependent Lagrangian for a system with one degree of freedom , (10) where 8, m and k are fixed real constants greater than zero. (total 10 points) (a) Write down the Euler-Lagrange equation of motion for this system, and interpret the resulting equation in terms of a known physical system. (1 point) (b) Find Hamiltonian via Legendre transformation. (1 point) (c) Show that q(t) and the corresponding canonical momentum p(t) can be found as follows for...
consider the system shown where m=50kg, c=200N.s/m, k1=350N.m,
and k2=550N.m. The free end of the spring k2 is excited by
y(t)=0.4sin3t(m) as shown
4. Consider the system shown where m = 50 kg, c = 200 N.s/m, ki = 350 N.m, and k2 = 550 N.m. The free end of the spring ky is excited by y(t) = 0.4 sin 3t (m) as shown (20 points) a) Determine the equation of motion of the system. b) Determine the natural frequency...