Seismic loads for structure-mounted equipment, Mechanical Engineering

Assignment Help:

Q. Seismic Loads For Structure-Mounted Equipment?

For equipment mounted in a structure above grade, the governing equation for seismic force is:

Fp = AvCcPacWc, where Av = (a site-specific value, equipment seismic coefficient Cc=5), and performance criteria factor P=1.0.ac=1.0, except for flexible equipment such as tall slender vessels, vessels on tall legs springs, or other resilient supports.  This factor is then given as follows: for Tc/T<0.6 or Tc/T>1.4, ac=1.0; for Tc/T³0.6 or Tc/T£1.4, ac=5.0. 

Tc is the first natural period of the equipment, and T is the first natural period of the structure.  Wc is the operating weight of the equipment.  Fp is the horizontal seismic force, applied at the center of gravity of the equipment and in the direction causing the highest stresses. The design of pressure retaining elements (both internal and external) shall permit allowable stress multiplying factors.


Related Discussions:- Seismic loads for structure-mounted equipment

Ceramics-refractory and abrasive materials, Ceramics, Refractory And Abrasi...

Ceramics, Refractory And Abrasive Materials Introduction There are some situations in practice where high temperatures are occupied. Besides creating that temperatures en

Two possible materials for casing, Two Possible Materials for Casing T...

Two Possible Materials for Casing Two possible materials for the casing would be a. Polypropylene or b. An aluminium 1/3 per cent silicon-casting alloy (LM6). Conclu

Transmission system , Transmission System: In a two-wheeler, the transmiss...

Transmission System: In a two-wheeler, the transmission system means the whole arrangement that transmits the power from the engine crankshaft to the rear wheel.

Scalar and vector quantities, Scalar and Vector quantities: A quantity...

Scalar and Vector quantities: A quantity is a scalar if it is completely defined by its magnitude alone. For example: Length, area, and time. While quantity is said to be vect

What are the problems to improve the deficirncies og iges, Problems to impr...

Problems to improve the deficirncies of IGES Within the framework of this interface, an attempt was to be made to improve the deficiencies of IGES, SET and VDAFS which have the

What do you mean by synchromesh device, What do you mean by synchromesh dev...

What do you mean by synchromesh device ? explain the basic working of a synchromesh gear box.

Welding arc physics, WELDING ARC PHYSICS Electric arc as an intense sourc...

WELDING ARC PHYSICS Electric arc as an intense source of heat is employed in welding of materials. In the field of welding techniques, arc welding processes constitute a major po

Finite Element Analysis of Pressure Vessel, Need a basic explanation of how...

Need a basic explanation of how to go about doing a plane strain analysis of a pressure vessel

Low alloy creep resisting and electrodes for cryogenic , LOW ALLOY CREEP RE...

LOW ALLOY CREEP RESISTING ELECTRODES AND ELECTRODES FOR CRYOGENIC APPLICATIONS The flux coating contains small amount of alloying elements like Cr, Mo and sometimes V for creep r

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd