White papers ARMA: how to perform proper modal analysis without an Impact Hammer in VibWorks. 3 March 2017 betavibn01 Download a printable version of this ArticleThis content is restricted to site members. If you are an existing user, please log in. New users may register below.New User RegistrationChoose a Username*First Name*Last Name*Company name*Day Phone*Email*Password*Confirm Password*Please make sure you check your spam folders before trying to register again**Required field