f0 34.5[Hz] "优化的频率"
W 18[m] "房间宽度"
H 9[m] "房间高度"
dH 1[m] "设计域高度"
Rob 1[m] "目标域半径"
xob 16[m] "目标域 x 坐标"
yob 2[m] "目标域 y 坐标"
rho1 1.204[kg/m^3] "空气密度"
K1 141.921e3[Pa] "空气的体积模量"
rho2 2643.0[kg/m^3] "铝密度"
K2 68.7e10[GPa] "铝的体积模量"
volfrac 0.85 "设计域体积分数"
alpha_K 0.001 "阻尼系数"
hmax 0.3 "最大单元大小"
rmin 0.1*hmax "最小单元大小"
beta 32 "投影斜率"