DLX 02: slender frame – eigenfrequencies

Description

Material		Modulus of elasticity	$E = 210 000 N/mm^2$
		Density	$\rho = 7800kg/m^3$
		Poisson’s ratio	$\nu = 0.3$
Geometry	Cross-sections		$b= 4.8mm$ $h=29mm$
	Boundary conditions	Points A	Fixed supports
		For all bars	$R_z, M_x$ and $M_y$ fixed to impose 2D behaviour
Mesh		No. of divisions	12

Eigen mode	Independent reference	Diamonds	Difference
1	8,8Hz	8,8Hz	0,00%
2	29,5Hz	29,4Hz	-0,34%
3	43,8Hz	43,8Hz	0,00%
4	56,3Hz	56,3Hz	0,00%
5	96,2Hz	96,2Hz	0,00%
6	102,6Hz	102,7Hz	0,10%
7	147,1Hz	147,1Hz	0,00%
8	174,8Hz	174,9Hz	0,06%
9	178,8Hz	178,9Hz	0,06%
10	206,0Hz	206,2Hz	0,10%
11	266,4Hz	266,7Hz	0,11%
12	320,0Hz	320,5Hz	0,16%
13	335,0Hz	335,5Hz	0,15%