initial commit / add all books

1 files changed, 23 insertions, 0 deletions

diff --git a/49/CH4/EX4.7/ex7.sce b/49/CH4/EX4.7/ex7.sce
new file mode 100755
index 000000000..728446efc
--- /dev/null
+++ b/49/CH4/EX4.7/ex7.sce
@@ -0,0 +1,23 @@
+//CHAPTER 4_ Motion and Dimensional Measurement

+//Caption : Seismic vibration

+// Example 7// Page 232

+disp("ty=0.6")

+disp("fn=10")

+disp("f=25")

+disp("M=0.15")

+disp("xo=1.5*10^-3")

+ty=0.6  //(' enter the damping ratio of seismic vibration pickup=:')

+fn=10   //('enter the natural frequency =:')

+f=25  //('enter the frequency at which the table is vibrating=')

+M=0.15  //( 'enter the seismic mass=:')

+xo=1.5*10^-3  //('enter the relative amplitude of the mass=:')

+r=f/fn;

+disp("xi=xo/((r^2)/sqrt((1-r^2)^2+(2*ty*r)^2));")

+xi=xo/((r^2)/sqrt((1-r^2)^2+(2*ty*r)^2));

+error=(xi-xo)/xo;

+printf('error in measurement is %fd\n',error)

+wn=2*%pi*fn;

+Ks=wn^2*M;

+printf('spring constant is %fd N/m\n',Ks)

+B=ty*(2*sqrt(Ks*M));

+printf(' damping coefficient of pickup is %fdN-s/m\n',B)
\ No newline at end of file