GB/T 8419-2023 English PDF (GB/T8419-2023)

GB/T 8419-2023: Earth-moving machinery - Laboratory evaluation of operator seat vibration
Delivery: 9 seconds. Download (& Email) true-PDF + Invoice.
Get Quotation: Click GB/T 8419-2023 (Self-service in 1-minute)
Historical versions (Master-website): GB/T 8419-2023
Preview True-PDF (Reload/Scroll-down if blank)

GB/T 8419-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 53.100
CCS P 97
GB/T 8419-2023 / ISO 7096.2020
Replacing GB/T 8419-2007
Earth-moving machinery - Laboratory evaluation of
operator seat vibration
(ISO 8096.2020, IDT)
ISSUED ON. SEPTEMBER 07, 2023
IMPLEMENTED ON. SEPTEMBER 07, 2023
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 6
3 Terms, definitions, symbols and abbreviations... 7
3.1 Terms and definitions... 7
3.2 Symbols and abbreviations... 8
4 General... 10
5 Test conditions and test procedures... 10
5.1 General requirements... 10
5.2 Vibration simulation... 10
5.3 Test seat... 11
5.4 Test person and posture... 12
5.5 Input vibration... 13
5.6 Input vibration tolerance... 19
6 Permissible limits... 20
6.1 SEAT factors... 20
6.2 Damping performance... 20
7 Seat identification... 21
8 Usage information... 21
8.1 General... 21
8.2 Test report... 21
References... 26
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 8419-2007 " Earth-moving machinery - Laboratory
evaluation of operator seat vibration". Compared with GB/T 8419-2007, in addition to
structural adjustments and editorial changes, the main technical changes are as follows.
- CHANGE the scope, adding the crawler dump trucks, horizontal directional
drilling rigs and other models (see 1.3, 1.4; 1.3, 1.4 of the 2007 edition);
- CHANGE the definition of "working mass" (see 3.1.3; 3.1.3 of the 2007 edition);
- ADD the term and definition of "active and semi-active suspension system" (see
3.1.5);
- ADD general requirements (see 4.1);
- CHANGE the normative references of frequency weighting (see 4.3; 4.2 of the
2007 edition);
- CHANGE the test personnel mass and wearable mass (see 5.4; 5.4 of the 2007
edition);
- ADD the damping test of active and semi-active suspension system (see 5.5.3);
- ADD the general rules in the use information (see 8.1);
- CHANGE the power spectral density (PSD) diagrams of input spectrum classes
(see Figures 2 and 4; Figures 2 and 4 of the 2007 edition);
- CHANGE the constants and maximum values of PSD calculated for input spectrum
classes (see Tables 2 ~ 4; Tables 2 ~ 4 of the 2007 edition).
This document identically adopts ISO 7096.2020 "Earth-moving machinery -
Laboratory evaluation of operator seat vibration".
Please note that some of the contents of this document may involve patents. The issuing
agency of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document shall be under the jurisdiction of the National Technical Committee for
Standardization of Earth-moving Machinery (SAC/TC 334).
Earth-moving machinery - Laboratory evaluation of
operator seat vibration
1 Scope
1.1 This document specifies the laboratory measurement and evaluation methods for
the efficacy of seat suspension systems in the frequency range of 1 Hz ~ 20 Hz for
reducing vertical whole-body vibration transmitted to earth-moving machinery drivers,
in accordance with ISO 10326-1.2016.This document also specifies the acceptance
criteria for operator seats applicable to various types of machines.
1.2 This document applies to operator seats for earth-moving machinery as defined in
ISO 6165.
1.3 This document specifies the required input spectrum classes for the following earth-
moving machines. Each class group specifies a group of machines with similar
vibration characteristics.
- Rigid frame dump trucks with a working mass > 4500 kg;
- Articulated frame dump trucks;
- Scrapers without axle or frame suspension 1);
- Wheel loaders with a working mass > 4500 kg;
- Motor graders;
- Wheel bulldozers;
- Soil compactors;
- Backhoe loaders;
- Crawler dump trucks;
- Crawler loaders;
- Crawler bulldozers with a working mass ≤ 50000kg 2);
1) For suspended tractor scrapers, a seat without suspension or a seat with a highly damped suspension may be used.
2) For crawler dozers greater than 50000 kg, a seat with a vibration-damping cushion is used to provide the required
performance.
GB/T 8419-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 53.100
CCS P 97
GB/T 8419-2023 / ISO 7096.2020
Replacing GB/T 8419-2007
Earth-moving machinery - Laboratory evaluation of
operator seat vibration
(ISO 8096.2020, IDT)
ISSUED ON. SEPTEMBER 07, 2023
IMPLEMENTED ON. SEPTEMBER 07, 2023
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 6
3 Terms, definitions, symbols and abbreviations... 7
3.1 Terms and definitions... 7
3.2 Symbols and abbreviations... 8
4 General... 10
5 Test conditions and test procedures... 10
5.1 General requirements... 10
5.2 Vibration simulation... 10
5.3 Test seat... 11
5.4 Test person and posture... 12
5.5 Input vibration... 13
5.6 Input vibration tolerance... 19
6 Permissible limits... 20
6.1 SEAT factors... 20
6.2 Damping performance... 20
7 Seat identification... 21
8 Usage information... 21
8.1 General... 21
8.2 Test report... 21
References... 26
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 8419-2007 " Earth-moving machinery - Laboratory
evaluation of operator seat vibration". Compared with GB/T 8419-2007, in addition to
structural adjustments and editorial changes, the main technical changes are as follows.
- CHANGE the scope, adding the crawler dump trucks, horizontal directional
drilling rigs and other models (see 1.3, 1.4; 1.3, 1.4 of the 2007 edition);
- CHANGE the definition of "working mass" (see 3.1.3; 3.1.3 of the 2007 edition);
- ADD the term and definition of "active and semi-active suspension system" (see
3.1.5);
- ADD general requirements (see 4.1);
- CHANGE the normative references of frequency weighting (see 4.3; 4.2 of the
2007 edition);
- CHANGE the test personnel mass and wearable mass (see 5.4; 5.4 of the 2007
edition);
- ADD the damping test of active and semi-active suspension system (see 5.5.3);
- ADD the general rules in the use information (see 8.1);
- CHANGE the power spectral density (PSD) diagrams of input spectrum classes
(see Figures 2 and 4; Figures 2 and 4 of the 2007 edition);
- CHANGE the constants and maximum values of PSD calculated for input spectrum
classes (see Tables 2 ~ 4; Tables 2 ~ 4 of the 2007 edition).
This document identically adopts ISO 7096.2020 "Earth-moving machinery -
Laboratory evaluation of operator seat vibration".
Please note that some of the contents of this document may involve patents. The issuing
agency of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document shall be under the jurisdiction of the National Technical Committee for
Standardization of Earth-moving Machinery (SAC/TC 334).
Earth-moving machinery - Laboratory evaluation of
operator seat vibration
1 Scope
1.1 This document specifies the laboratory measurement and evaluation methods for
the efficacy of seat suspension systems in the frequency range of 1 Hz ~ 20 Hz for
reducing vertical whole-body vibration transmitted to earth-moving machinery drivers,
in accordance with ISO 10326-1.2016.This document also specifies the acceptance
criteria for operator seats applicable to various types of machines.
1.2 This document applies to operator seats for earth-moving machinery as defined in
ISO 6165.
1.3 This document specifies the required input spectrum classes for the following earth-
moving machines. Each class group specifies a group of machines with similar
vibration characteristics.
- Rigid frame dump trucks with a working mass > 4500 kg;
- Articulated frame dump trucks;
- Scrapers without axle or frame suspension 1);
- Wheel loaders with a working mass > 4500 kg;
- Motor graders;
- Wheel bulldozers;
- Soil compactors;
- Backhoe loaders;
- Crawler dump trucks;
- Crawler loaders;
- Crawler bulldozers with a working mass ≤ 50000kg 2);
1) For suspended tractor scrapers, a seat without suspension or a seat with a highly damped suspension may be used.
2) For crawler dozers greater than 50000 kg, a seat with a vibration-damping cushion is used to provide the required
performance.