Vibration of double-walled carbon nanotube based nanomechanical sensor with initial axial stress

► Transverse vibration of DWCNT-based sensor under initial axial stress is analyzed. ► Nonlocal Euler-Bernoulli beam with a concentrated mass at any position is modeled. ► Transfer function method is used to obtain frequency of a bridged microbeam. ► Effects of attached nanoparticle, initial axial stress on frequency are discussed.