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Provided by: Technology Training, Inc. Mechanical Shock TechniquesMechanical Engineering |
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- E asked: I am a HVAC/ R certified technician with no in the field training. I am looking to enhance my knowledge and experience to make my resume more broader. If you can help please send me information on how I can follow up on traning. Thanks
- W asked: Please provide schedule concerning this class
- K asked: We have a prototype in the bicycle industry that we need tested for strength. It is made from aluminum. Would you be able to test it to show us what force it can take before breaking ,and possibly suggest other alloys to be used to reach our strength goals. Let me know and what kind of charge is involved. Thanks
- P asked: how to make shock and suspensioon techniques equivalent for vehicles while on a steep planes?
- W asked: Please provide schedule information about the course titled "Mechanical Shock Techniques". Regards,
- B asked: I am interested in this class. Would you send me more information on when and where it is offered? Thanks, Senior Principal Systems Engineer Armament and Technical Products Charlotte, NC
- C asked: Is there a scheduled date for this course, how long is the course, and what is the cost?
- asked: Is there a scheduled date for this course, how long is the course, and what is the cost?
- J asked: My husband Johnny is interested in your programs. His number is --.
- B asked: I am searching for additional training on packaging and shock attenuation in transportation systems for electronic equipment. We have degreed Mechanical engineers working for our company however, no direct packaging engineering courses with regard to transit shock/ vibration. Our engineering staff needs to be able to design and calculate expected shock given a foam or shockmount isolation system. Currently we use Mil-hdbk-B foam cushioning curves but have little formal training on shock attenuation and design. Are there courses in "packaging technology" or "cushioning technology" that would be appropriate for our staff?
- asked: Hello Dear, i have found your address from the internet source.Right now, keeping in view your work experience, i am needed some practicle data regarding the designing and testing of shock isolators (springs) in an earthquacking area of a shock intensity g.Kindly advice me about the designing provisions which must be considerded before the manufacturing of any spring (as generally static load is the basic criteria for the designing of springs) and characteristics of g shock in which -amplitude, - frequency, - time of shock, and - wave type generated through the shock. i shall be thankful to you in this regard. Best Regards, Amjad Hussain Mechanical Engineer. e-mail
Mechanical Shock Techniques
Course No. 142
(Course Outline shown below.)
Applications The effects of shock are important in many engineering applications ranging from appliances to computers to ships to automobiles, trucks and military vehicles to high-performance aircraft and missiles. Shock is often part of the service and/or transportation environment. Military Standards such as MIL-STD-810 call for shock testing.
The possible effect of shock must be considered for almost every product that has to be shipped and handled. Care can be taken in a controlled environment but during the transportation phase the product within its package must be designed and tested to withstand the anticipated environment.
For Whom Intended Most engineers need specialized education in order to properly measure, quantize and analyze this generally unfamiliar environment, and to reproduce it in environmental test laboratories. This course is for packaging designers, test laboratory managers, engineers and aides. It also helps quality and reliability specialists and acquisition personnel in government and military activities, and their contractors.
Instrumentation specialists who will measure transportation, service and laboratory shock need this course. Metrologists learn about shock calibration of accelerometers and systems. Project personnel, structure and packaging engineers learn about developmental shock testing. Product assurance and acquisition specialists learn to evaluate shock test facilities and methods, and to interpret shock test specifications.
This course is designed to serve the varied needs of scientists, engineers, aides and senior technicians. The instructor maintains good balance between practical training and theory.
Brief Course Description The course commences with a review of basic dynamic theory and then covers natural frequencies and modes before discussion system response to shock. The Shock Response Spectrum (SRS) is discussed as it relates to shock measurement and testing, as well as design. The relative merits of various types of shakers and shock test machines are briefly considered before covering various shock test methods, including pyrotechnic shock testing. The course then covers shock measurements, also calibration. Shock resistant design is discussed, including the selection and use of isolators.
The theory and practice of package and product fragility analysis are covered in some detail, including the use of the damage boundary plot and the selection and testing of cushioning materials. Some typical shock test procedures and specifications are described, both military and commercial. Classroom (bring calculators) and nightly review problems measure progress.
Certificate Programs This course is required for TTi’s Dynamic Test Specialist Certificate. It may be used as an elective for any of TTi’s Specialist Certificate programs. (see http://www.ttiedu.com/certprog.html)
Related Courses See course 142-4, Mechanical Shock and Modal Test Techniques (http://www.ttiedu.com/142-4cat.html).
Prerequisites Prior participation in TTi’s course Fundamentals of Vibration (http://www.ttiedu.com/116cat.html) would be helpful. Participants will need first-year college mathematics (or equivalent experience) and some facility with fundamental engineering computations. Some familiarity with electrical and mechanical measurements and vibration will be helpful.
Text Each student will receive a course workbook, including most of the viewgraphs used in the course presentation.
Course Hours, Certificate and CEUs Open courses meet seven hours per day. Upcoming presentation dates can be found on our current open course schedule (http://www.ttiedu.com/schedule.html). Class hours/days for on-site courses can vary from 14-35 hours over 2-5 days as requested by our clients. Upon successful course completion, each participant receives a certificate of completion and one Continuing Education Unit (CEU) for every ten class hours.
Course Outline No. 142
- Introduction — What is Shock ?
- Review of Dynamics and Theory of Materials
- Basic concepts
- Weight
- Mass
- Density
- Specific gravity
- Definitions of terms
- Friction, wear
- Work, power, energy
- Engineering materials
- Stress and Strain
- Elasticity
- Shear
- Stiffness
- Mass
- Spring-Mass Model
- Degrees of Freedom
- Basic concepts
- Vibration Theory
- Degrees of Freedom
- Natural frequency (resonance)
- Displacement, Velocity and Acceleration
- Transmissibility
- Damping
- Critical Frequencies
- Random Vibration
- Gaussian Random Signal
- Spectral Density
- System Response to Shock
- Natural Frequencies
- SDoF Transient Response
- The Transient Response Problem
- Free, Forced Response
- A Closer Look at Shock
- Terminology
- Input Pulse and Response of a Sprung Mass
- Typical Complex Shock Pulses
- Haversine Pulse
- Classical Shock Pulse Shapes
- Examples
- Critical Frequency Response
- Response to Shock Pulse
- Shock Response Spectrum (SRS)
- Shock Measurement
- Definitions
- SRS Mechanical analogy
- How SRS is developed during shock testing
- Maximax values
- Maximum Response Spectra for Various Shock Pulse Shapes
- Damping and SRS
- Damped Spectra
- Designing with SRS
- SRS in shock test specifications
- Shock spectrum analyzers
- Shock Testing: Shock Test Machines
- Drop test machines
- Impact machines
- MIPS tables
- Electrodynamic, Electrohydraulic and Piezoelectric shakers
- Shaker Optimized Cosine (SHOC)
- Pyroshock simulation
- Problem Areas
- Pendulum and Free-fall machines
- Shock Measurements
- Sensors for Force, Displacement, Velocity, Acceleration
- Seismic transducers
- Dynamic calibration of motion sensors
- Sensor attachment
- Cabling
- Accelerometer loading effects
- Designing for Shock
- Shock Resistant Design
- Isolation Methods
- Isolators which approach the ideal
- Shock isolation vs. Vibration Isolation
- Isolator selection
- Package/Product Fragility Analysis—Theory and Practice
- Determination of fragility
- methods and equipment
- Protective Packaging
- Potentially Harmful Environments
- Package design tradeoffs
- Design drop heights
- Product Fragility
- Damage boundary theory
- Step velocity and step acceleration
- Cushion materials
- Cushion performance curves
- Vibration in package testing
- Frequency response
- Multiple Drop Testing
- Package verification test procedures
- Fragility Assessment Theory and Test Procedure
- Typical Shock Test Specifications
- MIL-STD-810E, Method 516.4 Shock
- Typical Free Fall Shock Test Specification
- Table-Top Drop Shock Test
- Drop Shock and Vibration Test Specification for Disk Drives
- Summary
- Final examination
- Award of certificates for successful completion
For a printable (.pdf) version of course outline no. 142, see http:/www.ttiedu.com/PDF/142cat.pdf
For schedules, enrollment information and more, visit http://www.ttiedu.com.
