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.

28. try its best to collect and build good sentences.

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.

31. The swing is a pendulum with a single natural frequency depending on its length.

32. It is the natural frequency of emission of the hydrogen atoms in space.

33. The mode analysis of liquid-solid coupled system yields the first order natural frequency, vibration shape and the diaphragm amplitude-frequency relationship.

34. Synthesizing modal parameters, such as natural frequency, strain mode and so on, indirect index method of damage detection is presented.

35. The static displacement, the vibration modes and the natural frequency are discussed.

36. The optimal structural parameters of U - type tube are determined based on the lowest natural frequency principle.

37. Both increasing the mass and reducing the support stiffness of the slab can reduce the natural frequency of the FST system to achieve better performance of vibration isolation.

38. Natural frequency of culvert tail rotor of some kind of helicopter with uncertain composites was studied.

39. The natural frequency and sensibility are affected markedly when stiffness changes in low level range.

40. The results also demonstrate that the frequency which is obtained in the experiment by using the extrapolation method is the natural frequency of the metal bar indeed.

41. To study the influence of rotary inertia on gear flowmeter natural frequency, keep damping and leakage coefficient as constant.

42. The aluminum alloy bridge deck designed in chapter four was used for the footbridge, and the stiffness, natural frequency and stability factor is calculated also.

43. In the case of the small angular displacement, the natural frequency of the corresponding undamped linear system is obtained(), which is consistent with the experimental observation.

44. The vibration modal in ultrasonic frequency band is extracted and the natural frequency of work modal is determined through analyzing the characteristics of principal mode.

45. Keywords: micro - gyroscope , silicon single crystal, three - axis angular - rate sensing, natural frequency and mode shapes.

46. The test proves that vibration cutting efficiency is high and cutting resistance force is small when the vibration frequency is nearly equal to the natural frequency of cutting material.

47. The transient term is an oscillation of damped natural frequency , of whelloch the amplitude decays according to .

48. The results show that, the natural frequency, dynamic amplification factor and acceleration root of mean square of seat suspension will decrease with the increase of proportional valve input voltage.

49. A nonlinear parametric excitation equation is obtained for ships in longitudinal waves, and the dynamic stability is analyzed when the natural frequency of heave and roll are approximately equal.

50. The natural frequency of the press is far higher than the frequency of inertial force.

51. Natural frequency and dominant mode shape of FGM beams under four kinds of boundary conditions were obtained.

52. Also, with changes in boundary density, the natural frequency would show significant changes ( p 0.05 ).

53. Fatigue life of random vibration can be calculated by the fatigue life of sinusoidal vibration under first natural frequency.