This seminar systematically explains practical basic evaluation methods for vibration, which are required prior to CAE analysis, based on hand calculations.
Learn how to roughly estimate rotational vibration, torsional vibration, and critical speeds of shaft systems with gears and pulleys, and develop the ability to judge resonance risk in the early design stage.
In addition, this course organizes practical criteria directly applicable to engineering work, such as methods for reducing real machines into simplified models and evaluating the effects of support stiffness and damping.
This is a practical seminar aimed at strengthening design judgment skills that allow you to independently verify the validity of CAE results rather than blindly trusting them.
Do you have any of these problems?
- Is there a way to obtain a technical validity reference before CAE analysis?
- I am performing CAE analysis, but I am not confident in the validity of the results.
- Is there a design method that can avoid resonance before CAE analysis?
- I cannot understand hand-calculation formulas for vibration, so I am not motivated to use them.
- I cannot judge the technical validity of CAE results.
Seminar Overview
This seminar explains practical methods for preventing vibration problems at the machine design stage.
The purpose is to estimate natural frequencies and critical speeds using hand calculations before relying on CAE or detailed analysis, thereby avoiding vibration issues in the early design stage.
- Basic concepts for predicting and avoiding vibration problems at the early design stage
- Positioning of hand-calculation evaluation to be performed before CAE analysis
- Method for simply estimating critical speeds of rotational and torsional vibration
- Method for simplifying real structures into equivalent models for analysis
- Practical vibration evaluation methods considering support stiffness and damping
Seminar Program
1. Approach to eliminating vibration problems at the conceptual design stage
1-1 Differences between structures that generate vibration problems and those that do not
1-2 Initial setting methods for mass, stiffness, and boundary conditions
2. Basics of vibration modeling (premise for hand calculations)
2-1 Technique for reducing real machines to simple models
3. Hand calculation techniques for natural frequencies of translational vibration
3-1 Quick calculation of mass-spring systems
3-2 Equivalent conversion of multiple springs
4. Evaluation of forced vibration due to rotor imbalance
4-1 Hand calculation of amplitude
4-2 How to determine design allowable values
5. Hand calculation of critical speeds for rotational and torsional vibration
5-1 Simplified Rayleigh method
5-2 Approximate evaluation of multi-stage shafts
6. Critical speed calculation for shaft systems with gears and pulleys
6-1 Practical lumped-mass technique
7. Evaluation of the effect of support stiffness (bearings and frames)
7-1 Key point: if you miss this, everything fails
8. Estimation of damping and its reflection in design
8-1 Back-calculation from measurement data
8-2 Assumed value setting at design stage
9. Design checklist (failure prevention flow)
10. Q&A
Main outcomes obtained from this seminar
- Practical ability to quickly estimate critical speeds of rotational vibration, torsional vibration, and shaft systems with gears/pulleys using hand calculations, and judge resonance avoidance feasibility at early design stage
- Ability to verify the validity of results using hand calculations before relying on CAE, to judge whether analysis results are trustworthy or not, and to independently correct settings such as mass, stiffness, and support conditions
Prerequisite knowledge for attendance
- A basic understanding of university-level mathematics and mechanics is desirable; however, even without such knowledge, the essential concepts and key points will be explained carefully for understanding.
Benefits
- Free Q&A support for this seminar content (for 15 days starting the
day after completion)
- Free technical consulting for vibration-related work issues (for 15 days starting the day after completion)
Course dates / period
- Offered year-round (on-demand seminar)
- You can view for 3 days.
After application, please enter your preferred 3 consecutive viewing days (weekends and holidays allowed) in the form field at the bottom: "Inquiries, messages, confirmations to Aitop Co., Ltd."
While we will accommodate your preferred schedule as much as possible, we will contact you later regarding availability.
Recording year & duration
Fee
- Campaign fee: 28,000 yen (all included / approx. half of a typical technical seminar. This is a campaign price due to full website renewal and may change without notice)
This seminar FAQ & Privacy Policy
List of companies attending & feedback from participants
Instructor
| Title & Name |
Aitop Co., Ltd. Chief Technical Consultant
Certified Engineer, Japan Society for Noise Control Engineering
Recipient of the Technical Development Award, Acoustical Society of Japan
Former part-time lecturer at Nagoya University Graduate School (lectured in English to international students: 2021–2024)
Kobayashi Hideo
|
| Specialty |
AI-based vibration and noise technology and related theoretical and applied engineering, and its practical implementation |
| Achievements |
With over 30 years of experience as a technical consultant and seminar instructor, he has extensive practical achievements and has long served as a lecturer at industrial technology centers across Japan and at seminars hosted by Nikkan Kogyo Shimbun. |
*The above seminar program may be subject to minor changes due to circumstances.