i want to make a cyber physical system simulation with openmodelica and ns-2 .but dont know how to combine two of them, does anyone know how to do it

hello,can you teach me how to install the openmodelica on ubuntu,i often failed.

thank u very much.

thanks，but it does not work;
it is always display this meassage:      gpg: no valid OpenPGP data found.

frost@frost-virtual-machine:~$ for deb in deb deb-src;
> do echo "$deb http://build.openmodelica.org/apt `lsb_release -cs` stable";
> done | sudo tee /etc/apt/sources.list.d/openmodelica.list
[sudo] password for frost:
deb http://build.openmodelica.org/apt trusty stable
deb-src http://build.openmodelica.org/apt trusty stable
frost@frost-virtual-machine:~$ wget -q http://build.openmodelica.org/apt/openmodelica.asc -0- | sudo apt-key add -
wget: invalid option -- '0'
wget: invalid option -- '-'
Usage: wget [OPTION]... [URL]...

Try `wget --help' for more options.
gpg: no valid OpenPGP data found.

unable to locate package openmodelica