Heavy Machinery Foundations Dynamic Analysis of Structure & Equipment

23rd-24th April 2018 New Delhi - 25th-26th April 2018 Mumbai

Course Description

Workshop Objective:

Machine foundations require a special consideration because they transmit dynamic loads to the soil in addition to static loads due to the weight of foundation, machine, and accessories. The dynamic load due to the operation of the machine is generally small compared to the static weight of the machine and the supporting foundation. In a machine foundation the dynamic load is applied repetitively over a very long period of time but its magnitude is small and therefore the soil behavior is essentially elastic, or else deformation will increase with each cycle of loading and may become unacceptable. The amplitude of vibration of a machine at its operating frequency is the most important parameter to be determined in designing a machine foundation, in addition to the natural frequency of a machine foundation soil system. There are many types of machines that generate different periodic forces.
The most important categories are:
1. Reciprocating machines: The machines that produce periodic unbalanced forces (such as steam engines) belong to this category. The operating speeds of such machines are usually less than 600r/min. For analysis of their foundations, the unbalanced forces can be considered to vary sinusoidally.

2. Impact machines: These machines produce impact loads, for instance, forging hammers. Their speeds of operation usually vary from 60 to 150 blows per minute. Their dynamic loads attain a peak in a very short interval and then practically die out.

3. Rotary machines: High-speed machines like turbogenerators or rotary compressors may have speeds of more than 3,000r/min and up to 12,000r/min.
A suitable foundation is selected, depending upon the type of machine. For compressors and reciprocating machines, a block foundation is generally provided. Such a foundation consists of a pedestal resting on a footing. If two or more machines of similar type are to be installed in a shop, these can profitably be mounted on one
continuous mat.
Determine whether the support structure (foundation) has sufficient mass and stiffness to permit the machine to operate in or near a state of equilibrium.

Machinery generates energy (vibration) that must be either absorbed by the foundation or trapped within the machine. When a machine is mounted on a concrete pad, the pad should be independent of the surrounding floor.

With few exceptions, machinery is designed to operate on a true horizontal plane. The entire machine-train must be level and in the proper horizontal plane.

The final requirement is the proper alignment of the machine's driver and driven units. But normally, the shafts must be parallel and in the same plane within a maximum of 0.001 to 0.002 in.
For registration contact us on 022-62210100 or email us on techsupport@marcepinc.com

Training Agenda



Training Agenda

• Introduction to Vibration

 What is Vibration
 Equations of Motion
 Single degree of Freedom system, Multidegree of Freedom system
 Free vibrations
 Forced vibrations
 Types of Dynamic Loads
 Vibration amplitude
 Concept of Phase
 Displacement, Velocity & Acceleration curves
 Amplification of Response & Resonance

• Types of Machines

 rock crushers and metal shredders
 High and Low-speed machines

• Types of Machines foundation
• Dynamic soil properties
• Vendor data for dynamic analysis of machine foundation
• Method of Analysis of Machine Foundations
 Elastic half-Space Theory
 Analog method
 Lumped mass or lumped parameter method
 Time history method

• Effect of Soil embedment
• General requirements of Machine foundations
• Concrete design and detailing of Machine foundations
• Grouting
• Introduction to codes
 IS:2974 Part 1 to 4
 ACI 351.3R-04

• Case studies
 Block Foundation of Soil and on piles
 Tabletop Foundation

• Softwares available for Dynamic analysis
For registration contact us on 022-62210100 or email us on techsupport@marcepinc.com

Course Director

did his graduation from Pune University (1973) and M.Tech in Structural Engineering from I.I.T Kanpur (1975). Thereafter, he joined TATA CONSULTING ENGINEERS (TCE) at Mumbai. He worked there for 20 years and during this period he worked as a Design Engineer for 3 Nuclear Power Plants (Narora, Kakrapar & Tarapur 500 MW). did his graduation from Nagpur University (1985) & M.Tech in Structural Engineering from I.I.T Bombay (1987). Thereafter, he joined TATA CONSULTING ENGINEERS (TCE) at Mumbai.
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