tension estimation of elastic cables using viberational method

This paper presents a simplified method for the evaluation of the tension in elastic cables and tendons based on vibrational method. the accuarcy and simplicity of this method is compared with other methods. force transmitting members in different structures including, cable-stayed bridges, post-tensioned segmental bridges and so on as axiallyone-dimensional tensioned structures reflect the health of entire system, therefore a rapid tension estimation is needed for condition monitoring. estimated tension with numerical pre-determined formulas of string theory, beams theory with different boundary conditions are compared with estimated tension conducting mode shape ratios and modal frequenciesfor multiple measurment. furthermore, sensor location and mode selection of mode shape functions method is simplified by dominating the first mode to simplify the error function with changing reference sensor location to mid-length as equation 1.