Diesel-engine vibration isolation system modal-analysis method of considering thermal expansion of smoke exhaust pipe

• Main Authors: LYU SHEN, FU WANWEI, LI WANYOU, LU XIQUN, LI KAIJIE, KANG NAXIN, GUO YIBIN
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2017
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a diesel-engine vibration isolation system modal-analysis method of considering thermal expansion of a smoke exhaust pipe. Experiment is statically loaded through a vibration isolator, a rigidity test is carried out, and the rigidity of the vibration isolator in load bearing is obtained according to a rigidity hysteresis loop of the vibration isolator; then a three-dimensional model, in which the smoke exhaust pipe is considered, of a vibration isolation system is established; the constraint rigidity is corrected through correlation analysis for the modal experiment and modal calculation of the vibration isolation system; the vertical rigidity of the smoke exhaust pipe is determined; and a value range of the radial rigidity of the smoke exhaust pipe is estimated and obtained, and modal parameters are calculated. According to the method, it is considered that due to the thermal expansion, the smoke exhaust pipe of the diesel-engine vibration isolation system leads to generating a rigid c