GB/T 8419-2023Earth-moving machinery - Laboratory evaluation of operator seat vibration (English PDF)

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