Ever since the existence of mankind, it has noticed a remarkable advancement in field of science and technology. Traditional hand weaving methods have been replaced by modern and speedy looms machine. With faster production rate, these machines proved to be a boon for textile manufacturers. However, they come with an unnoticed problem of “vibration”. Hence, there arises a need to study the effects of vibrations on the structural as well as non structural components of the building.
Here in this project, an attempt has been made to study the dynamic behavior of a structure for looms industry subjected to vibration due to operations of looms machine; by changing its various parameters. With an increase in demand of textile, more and more looms machines are being installed every day. While designing the structure to house these looms it becomes incumbent upon the designer to curtail the amplitude of vibrations within the permissible limits. One must also make sure that the frequency of structure is separated for operating frequency of machine by a good margin, so that the “Resonance Condition” can be avoided.
The looms machine fall under the category of reciprocating machine and have medium operating speed ranging from 100 rpm to 180 rpm. The main source of vibration is the Beating-Up motion. This generates a Harmonic Load due to the unbalanced force caused by the reciprocating sley movement. Hence, the designing of structure for looms industry is a complex process which needs prime considerations. The cost of dynamic analysis of these structure is paramount, hence a small fraction of amount is being spent might lead to inadequately constructed structures which may result in failure and shut downs, exceeding many times the cost of the capital investment required for properly designed and built structure.
Now, in such a case by executing parametric study, one can decide which parameter out of many is most sensitive to odd results, so that by varying those parameters only results can be brought to the required level and do not affect other reliable results. An attempt is made in the thesis to carry out a parametric study by using software STAAD. Pro
Following Parameters are studied in this thesis
1. Sizes of Column
2. Sizes of Beams
3. Story Height
4. Number of Stories
Effect of remedial measures like:
1. Cross Bracing below Plinth Level
2. Full Length Jacketing of Columns
3. Partial Length Jacketing of Columns
4. Cross Tie-Beams
5. Haunches at the Junction
Inhaltsverzeichnis (Table of Contents)
- Chapter: 1 Introduction
- 1.1 History of Textile
- 1.2 History of Textile Industry in Surat City
- 1.3 Problem Definition
- Chapter: 2 Aim of the Study
- Chapter: 3 Literature Review
- Chapter: 4 Theoretical Background
- 4.1 Vibration Theory
- 4.1.1 Definition
- 4.1.2 Types of Loads
- 4.1.3 Degrees of Freedom
- 4.1.4 Resonance
- 4.2 Classification of Machines
- 4.2.1 Rotating Machinery
- 4.2.2 Reciprocating Machinery
- 4.2.3 Impulsive Machinery
- 4.3 Types of Foundations
- 4.3.1 Block-type foundation
- 4.3.2 Combined block-type foundation
- 4.3.3 Pile foundations
- 4.3.4 Wall type foundations
- 4.3.5 Framed-type foundation
- 4.4 Load Acting on the Structure
- 4.4.1 Construction load
- 4.4.2 Live load
- 4.4.3 Time History Load
- 4.5 Working of Shuttle Looms
- 4.5.1 Primary Motion
- 4.5.2 Secondary Motion
- 4.5.3 Ancillary Motion
- 4.6 Source of Vibration – The Beating-Up Motion
- 4.7 Codal Requirements
- 4.7.1 General requirements of Machine Foundation
- 4.7.1.1 General
- 4.7.1.2 Static Design
- 4.7.1.3 Dynamic Design
- 4.7.2 Design Criteria
- 4.7.1 General requirements of Machine Foundation
- 4.8 Various Types of Remedial Techniques
- 4.8.1 Cross-Bracing
- 4.8.2 Jacketing of Columns
- 4.8.3 Tie-Beams
- 4.8.4 Haunches
- 4.1 Vibration Theory
- Chapter: 5 Numerical Study and Results of Dynamic Analysis for an Industrial Building
- 5.1 General
- 5.2 Building Geometry
- 5.2.1 Ground Storey Building
- 5.2.2 Ground + One Storey Building
- 5.2.3 Ground + Two Storey Building
- 5.3 Typical Input Data Required
- 5.3.1 Building geometry
- 5.3.2 Material data
- 5.3.3 Machine Data
- 5.3.4 Loads acting on the Structure
- 5.4 Expected Output Results
- 5.5 Typical Steps of defining Numerical Problem in STAAD.Pro
- 5.6 Numerical Study Problem
- 5.6.1 Building Geometry
- 5.6.2 Material data
- 5.6.3 Shuttle Loom Machine Data
- 5.6.4 Loads Acting on the Structure
- 5.7 Numerical Study on Remedial Measures
- Chapter: 6 Discussion and Conclusion
- 6.1 Concluding Remarks for Ground Storey Building
- 6.2 Concluding Remarks for Ground + One Storey Building
- 6.3 Concluding Remarks for Ground + Two Storey Building
- 6.4 Concluding Remarks on Remedial Measure of Ground Storey Building
- 6.5 Concluding Remarks on Remedial Measure of Ground + One Storey Building
- 6.6 Concluding Remarks on Remedial Measure of Ground + Two Storey Building
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
The primary objective of this report is to investigate the dynamic behavior of a building structure designed for the looms industry, particularly focusing on the impact of vibrations generated by the looms machines. The study aims to understand how varying the sizes of structural components like beams and columns affects crucial dynamic parameters such as frequency and amplitude. Additionally, the report explores the effectiveness of various remedial measures, such as cross-bracing, jacketing, tie-beams, and haunches, in mitigating resonance conditions and improving the overall performance of the building structure.
- Dynamic analysis of structures in the looms industry
- Impact of machine-induced vibrations on structural performance
- Parametric study on the effects of structural component sizes
- Evaluation of remedial measures for vibration control
- Assessment of resonance conditions and their mitigation strategies
Zusammenfassung der Kapitel (Chapter Summaries)
Chapter 1 introduces the history of textile weaving, highlighting the transition from traditional handloom methods to modern, high-speed power looms. It emphasizes the growing textile industry in Surat, India, and the accompanying challenge of managing vibrations induced by the looms machines. Chapter 2 outlines the specific aims and objectives of the study, focusing on the parametric analysis of various structural elements and their impact on the dynamic behavior of the building. Chapter 3 provides a comprehensive literature review, exploring diverse research findings and methodologies related to machine foundation design, vibration theory, and remedial measures. Chapter 4 delves into the theoretical background of vibration theory, machine classification, foundation types, and loading considerations. It also examines the working principles of shuttle looms, focusing on the beating-up motion as a primary source of vibration. Lastly, the chapter discusses relevant codal requirements and design criteria for machine foundations, along with a detailed description of various remedial techniques used for vibration control, such as cross-bracing, jacketing, tie-beams, and haunches.
Schlüsselwörter (Keywords)
This report focuses on the key areas of dynamic analysis, machine-induced vibrations, structural performance, parametric study, remedial measures, resonance control, and the looms industry. The research examines the impact of structural component sizes, such as beams and columns, on the frequency and amplitude of vibrations. It also explores the effectiveness of various structural modifications, such as cross-bracing, jacketing, tie-beams, and haunches, in mitigating resonance conditions and improving the overall performance of the building structure.
- Quote paper
- Jigar Sevalia (Author), Yogesh Rathod (Author), Sunil Kukadiya (Author), Sarthi Bhavsar (Author), 2013, Dynamic Analysis of Structures for Looms Industry, Munich, GRIN Verlag, https://www.grin.com/document/280411
