A theoretical model has been studied to describe the sound radiation analysis for a railway under the action of harmony line moving forces. When a railway is analyzed, it had been modeled as curved beams with distributed springs and dash-pots that represent the radial, tangential stiffness and damping of rail, respectively. The reaction due to fluid loading on the vibratory response of the curved beam is taken into account. The curved beam is assumed to occupy the plane y=0 and to be axially infinite. The curved beam material and elastic foundation are assumed to be lossless Bernoulli-Euler beam theory including a tension force(T), damping coefficient(C) and stiffness of foundation(K2) will be employed. The expression for sound power is integrated numerically and the results examined as a function of Mach number(M), wave-number ratio( ) and stiffness factor(ψ).
목차
ABSTRACT 1. 서론 2. 음향파워 해석 3. 수치해석 4. 결과 및 분석 5. 결론 References
키워드
Fluid Loading(유체하중)Harmonic Point Force(조화집중하중)Loss Factor(손실계수)Railway(철로)Sound Radiation(음향방사)
저자
서양 [ Yang Xu | Department of mechanical engineering, Wonkwang University Graduation school ]
김병삼 [ Byoung-Sam Kim | Member, Department of smart automobile engineering, Wonkwang University ]
Corresponding author