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1. A gravitational wave at the natural frequency for longitudinal oscillations of the bar would set it ringing like a tuning fork.

2. By vibration mechanics theory the calculating formula of natural frequency of hanging pipe water is established.

3. Natural frequency and dynamical respond of the pipeline structure are also analysed and calculated.

4. Dynamical test and the main natural frequency and pattern of vibration of the bridge are gotten.

5. The lower the natural frequency of the FST is, the better the performance of vibration isolation is.

6. The natural frequency and time of output stable signal of dial indicator are analyzed.

7. Conjugate poles can be described in natural frequency and damping factor.

8. And the numerical characteristics of natural frequency are derived by using the fuzzy factor method and the principles of interval arithmetic.

9. Through the numerical calculation the curves of elastodynamic natural frequency and responses varythe time were obtained.

10. Based on the equal fundamental of first-order natural frequency and same mode shape, the lumped parameter model of single DOF for single turn was obtained.

11. The natural frequency of horizontal vibration increase with the guide wheel stiffness " increasing. "

12. The natural frequency and mode shape are very important to design and operation.

13. Each natural frequency and principal mode of vibration is obtained.

14. The initial fourth order natural frequency are obtained through natural vibration analysis.

15. Natural frequency of transverse vibration of the grinding block holder was obtained, according to the finite difference equations of grinding block holder. K was revised by extrapolation method.

16. The computing method for natural frequency of feeding machine is introduced.

17. Results indicate that the fundamental natural frequency is affected by restricted angle, relative damping coefficient and volume ratio of the two chambers.

18. This paper takes a type gas turbine rotor analyze its natural frequency and modal shape.

19. Vibration frequency of ball end mill by an external force is far from the natural frequency of it, resonance phenomenon does not occur, so vibration and deformation of ball end mill are not abvious.

20. Compile a computer program to compute the dynamic characteristics of spindle. Each natural frequency and principal mode of vibration is obtained.

21. The mistuned coupling strength between shrouds and the mistuned natural frequency of blade are considered to distribute normally.

22. There is no peaking in the response but simply a smooth roll-off above the natural frequency.

23. The emphasis is placed on wave form synthesis target discrimination based on natural frequency.

24. Experimental results indicated that the amplitude response changed obviously close-by the natural frequency.

25. The results show that the quantity of the ralarive change of the damped natural frequency caused by a crack is directly proportional to the square of the strain modal value at the crack.

26. The test result shows that clamper greatly increases only the first natural frequency.

27. This paper introduces the micro magnetometer and analyses the natural frequency and driving voltage of the sensor as well.

28. To a model for the study, the axis of the unit system to reverse the natural frequency sensitivity and self-analysis.

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29. Otherwise, steel fibers could not change the internal dynamic response such as stiffness, natural frequency and dynamic magnification factor of prestressed wide-beam frame.

30. On the base of sensibility analysis, an optimization for tensioner is performed with the lowest sensibility of system natural frequency as the objective.