From fd50873a03215ea5c27cc595d5bec960b0df2adc Mon Sep 17 00:00:00 2001 From: Shubhangi S Bansude Date: Fri, 9 Oct 2020 19:43:38 -0400 Subject: [PATCH] Create Shubhangi_check_lab03_comment Comment on Check_lab03.py > check_p02 --- Shubhangi_check_lab03_comment | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Shubhangi_check_lab03_comment diff --git a/Shubhangi_check_lab03_comment b/Shubhangi_check_lab03_comment new file mode 100644 index 0000000..4c29cb0 --- /dev/null +++ b/Shubhangi_check_lab03_comment @@ -0,0 +1,26 @@ +Check_lab03.py > check_p02 does not work for me. Frequency values differ for specified density and Ypung's modulus. + +Problem 2 - +# your work here +E=210E9 # 70,000,000 Pa=70 GPa +b=2e-3 # width in m +t=6e-3 # thickness in m +I=b*t**3/12 # second moment of area for rectangular cross-section (m^4) +mbar=7800*b*t # 7500 kg/m^3*(cross-section area) -> mbar [kg/m] +L=300e-3 # length in m + +f1=natural_frequency(1,E,I,mbar,L) +f2=natural_frequency(2,E,I,mbar,L) +f3=natural_frequency(3,E,I,mbar,L) +p.check_p02(f1/2/pi,f2/2/pi,f3/2/pi) + +print('the 1st natural frequency is %1.3f Hz'%(f1/2/np.pi)) +print('the 2nd natural frequency is %1.3f Hz'%(f2/2/np.pi)) +print('the 3rd natural frequency is %1.3f Hz'%(f3/2/np.pi)) + +Output : + +Whoops, try again +the 1st natural frequency is 55.879 Hz +the 2nd natural frequency is 350.190 Hz +the 3rd natural frequency is 980.542 Hz