I have modelled a steel frame height and wide is 4 m. bases of coloumn are 400 mm , steel element , density 8036.56 kg / m3 .
and I have used shell element of 5mm thickness. but in analysis result when i am increasing the area ao meshing the areas I am getting different result and above all...
Problem : continuous frame with shell element . heigh and wide 4000 mm , bases of coloumn 400 mm . shell thickness 5 mm. original weight 180 Kgf. density 8036.56 kg / m3 . steel elemnt. E = 200 GPa.
according to a literature its 7th , 8th and 9th mode natural frequency is 4.14 Hz , 4.64...
A cantilever beam length 2m,cross section 60mmX40mm , material density 2800kg/m3. E= 78GPa. when im calculating analytically its free vibration due to its own weight , I am getting 8.52 Hz . But In SAP 2000 is giving me 594.18 Hz.... where is my mistake????????? please help me...
A cantilever beam is 2m long anad has a cross section 60mmX40mm. material property - density 2800kg/m3.E= 78GPa . i am getting its free vibration due to its own weight by analytically 8.52 Hz. But i am not getting this answers in Sap 2000. I am getting 594 hz .. please help me.
