ML20198H371

Non-proprietary HI-91700, Dynarack Validation Manual

ML20198H371
Person / Time
Site:	Waterford
Issue date:	11/12/1991
From:	Soler A HOLTEC INTERNATIONAL
To:
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ML20198H363	List: ML20198H357 ML20198H371 ML20198H391 ML20198H406 ML20198H412 ML20198H437 ML20198H442 ML20198H464 ML20198H468
References
HI-91700-(NP), NUDOCS 9812290327
Download: ML20198H371 (9)

Text

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E HOLTEC l

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j DYNARACK VALIDATION MANUAL i

Alan L Soler i

Hottec International i

Holtec Report HI-91700 j

Report Category: Generic 4

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lNTERNATIONAL REVIEW AND CERTIFICATION LOG DYNARACK VALIDATION MANUAL s

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HOLTEC DOCUMENT LD. NO.

HI-91700 (Generic) i HOLTEC PROJECT NUMBER Not applicable Not applicable GEON

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Signatures and printed names are required in the review block.

This document conforms to the requirements of the design specification and the applicable sections of the governing codes.

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t TABLE OF CONTENTS Nn=hr of Pacas 1.0 OVERVIEW OF DYNARACK 7

2.0 REFERENCES

3 3.0 VALIDATION PLAN 5

4.0 PROBLEN 1 - LUMPED MASS IMPACTING A SIMPLY SUPPORTED BEAN 15 5.O PROBLIN 2 - CANTILEVER BEAN WITH GAP SUPPORT SUBJECT TO TIME VARYING FORCE 11 6.0 PROBLIN 3 - ELASTIC WAVE PROPAGATION IN A ROD 6

7.0 PROBLEN 4 - TWO DBGREE-OF-FREEDON LINEAR SYSTEN WITN INERTIAL COUPLING 4

8.0 PROBLEN 5 - IMPACTING PENDULUMS 6

9.0 PROBLEN 6 - SUBHARMONIC RESONANCE 4

10.0 PROBLEN 7 - SIMULATION OF FRICTION BEHAVIOR 5

la A PROBLEN 8 - NASS WITH NON-LINEAR SPRING JUMP PRENOIGNA 6

12.0.PROBLEN 9 - LIMIT CYCLE BEHAVIOR 8

13.0 PROBLIN 10 - STEADY STATE RESPONSE OF BOXES IN WATER 21 14.0 PROBLBE 11 - TEST PROBLEM TO CHECK DYNARACK INMFF OODING 3

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TABLE OF CONTENTS (continued) i

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APPENDICES

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A-1: Input Data for Model and Transient Analyses 4

for a Ball Dropping on a S.S. Bean 35 1

A-2: Beam Impact Problems - 5 Cases l

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A-3: DYNARACK 33 DOF Analysis with " Beam Springs" 29 2

B-12 ANSYS Irput Data for Nodel Analysis l

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B-2 ANSYS Response Time-IIistories 18 i

B-3: Beam Impact 2roblem Using DYNARACK with an ANSYS comparison i

27 C:

Wave Propagation 27 4

0-1: Alternate Numerical Solution from Thomson Text 4

i D-2: DYNARACK Results 10 l

E-1: ANSYS Example No. 6: DYNARACK Response of a System of Impacting Pendulums 13 E-2: DYNARACK Results for 5 Pendulum Impact Problem 12 F-1: Sec. 2.14 from Textbook " Component Element Nethod", McGraw Hill (1976) by S. Levy and J. wilkinson (Subharmonic Response) 2 F-2: Subharmonic Resonance 7

G1 Static and Sliding Friction in Feedback Systems 9

G-2: Friction with Dead Bands DYNARACK Data Files 12 H-1: Jump Phenomena Approximate Solutions 3

i H-2: DYNARACK Jump Phenomena Simulation Input, Output 7

Files and Plot Code for Response Curve I-1: DYNARACK Limi' Cycle I/O Files.

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J-1: Test of DYNARACK Effect of Equation Formulation e

Tee Section Problem 12 m

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1.o OVERVIEN OF DYNARACE

1.1 Background

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j DYNARACK is a Holtec International proprietary computer program I

with capability to perform dynamic simulat' ion on a wide variety of i

linear anu non-linear systems and structures.

DYNARACK utilizes l

the classical " Component Element" method (1.1) for simulation of j

dynamic response.

The component Element method amphasizes the overall dynamic behavior of systems while de-emph'asizing the detailed stress field in the structure in contrast to the Finite Element method (1.2) which focuses on the stress distribution.

At a result, the Component Element ' method has been a powerful analysis tool in the study of dynamic problems involving friction, damping, t

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impact and other non-linear phenomena.

The method has been shown l

to be particularly suited for treating diverse array of problems,

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such as those of earthquake response in non-linear systems, vehicle collision dynamics, aircraft landing simulation and railroad car motion (1.1, 1.3-1.12).

In essence, the Component Element method entails modelling the structure as an assemblage of lumped masses, l

springs, gap elements, friction elements, and dampers.

The term

" spring" in this document is used in the generic sense to represent the stiffness characteristics of structural elements such as beams and bars.

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DYNARACK originated in the late 1970s as a general purpose dynamic l

analysis code.

Later, in 1979-80, special subroutines were added j

to DYNARACK to make it especially adaptable for simulation of fuel l

rack structures.

The enhanced version of the program was first applied in the licensing,of the Enrico Fermi Unit Two rarack application in 1980.

Since that time, DYNARACK has been used in 1

j over 1000 dynamic simulations of free-standing fuel rack l

structures.

The program has also been used as a research tool to j

explore the dynamic characteristics of free-standing structures j

(1.13 and 1.14).

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Since the beginning, DYNARACK has been subjected to an extensive j

series of validation problems to ensure the veracity of the code, j

These validations are documented in References (1.15, 1.16]. A more S

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recent series of validations dealing with the predictive capability of DYNARAG when dealing with well known classical non-linear dynamic phenomena is given in (1.17).

This reporf. represents a compilation of previous validation problems, re-validated with the current operational version of DYNARAG, as uell as some new exacting benchmark problems. This report formalizes the approach to validation in keeping with present nuclear industry requirements for software validation.

REMAINDER OF DOCUMENT IS PROPRIETARY AND IS EXCLUDED FROM THIS NON-PROPRIETARY VERSION

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