The application of physical testing in the field of excavators is crucial, involving multiple aspects such as excavator design, manufacturing, performance evaluation, and improvement. The following is a detailed analysis of the application of physical testing in excavators:

### 1. Application of Physical Testing in Excavator Design

In excavator design, physical testing can be used to verify and optimize the structural design and performance parameters of the excavator. For example, mechanical tests can evaluate the strength and stiffness of various excavator components to ensure they can withstand actual working loads; dynamic tests can analyze the motion characteristics and power performance of the excavator, providing a basis for design optimization.

### 2. Application of Physical Testing in Excavator Manufacturing

During the manufacturing process of excavators, physical testing can be used to detect and control manufacturing quality. For example, non-destructive testing techniques (such as ultrasonic testing, magnetic particle testing, etc.) can detect internal defects and surface cracks in excavator components to ensure their integrity and reliability; fatigue tests can evaluate the durability and lifespan of excavator parts during long-term use, providing guidance for improving manufacturing processes and material selection.

### 3. Application of Physical Testing in Excavator Performance Evaluation

Performance evaluation of excavators is an important step to ensure their quality and reliability. Physical testing can be used to assess various performance indicators of excavators, such as digging force, rotation speed, travel speed, and braking performance. These tests are usually conducted at specialized test sites using professional testing equipment and instruments to measure and record the performance data of the excavator. By comparing and analyzing this data, it is possible to evaluate whether the excavator's performance meets design requirements and usage standards.

### 4. Application of Physical Testing in Excavator Improvement

During the use of excavators, some performance issues or faults may be discovered. At this time, physical testing can be used to diagnose the causes of problems and propose improvement measures. For example, fault analysis tests can determine the location and cause of excavator faults; optimization tests can explore new methods and technologies to improve excavator performance. These tests help in the continuous improvement and optimization of excavators, enhancing their work efficiency and service life.

### 5. Examples of Physical Testing for Excavators

1. **Complete Machine Performance Test**: Focuses on detecting overall performance such as operational parameters and work efficiency of the excavator. This includes measuring the main machine's external dimensions and various operational parameters, determining the total weight and center of gravity, ground pressure measurement, stability testing, and digging force measurement. The digging force test needs to be conducted at a dedicated digging force test site using a force gauge to measure the maximum digging force.

2. **Reliability (Industrial) Test**: Also known as durability testing, its purpose is to assess the working reliability of the prototype and the lifespan or fault conditions of major components during actual operations. Reliability tests need to be conducted at sites with testing conditions, and issues found during the testing process should be rectified and improved.