The purpose of this paper is to provide reference for safety warning and accident recovery of tank truck rollover. The calculation method of critical lateral acceleration of tank truck considering liquid sloshing is studied by combining analytical method and multi-body dynamics simulation method. In this paper, three methods are presented to solve the critical lateral acceleration of tank truck rollover considering liquid sloshing, which are analytical method, step steer simulation method and tilt table simulation method respectively. The liquid sloshing is simplified to two-dimensional liquid sloshing by assuming that the lateral acceleration of the tank truck is constant. The change of liquid center of gravity is used to be equivalent to the effect of liquid sloshing on tank truck rollover. The influence data of liquid sloshing, tire, suspension system and tank truck center of gravity on the rollover of tank truck were obtained. The research results can be applied to the safety warning and accident recovery of tank truck.
Transportation hubs are an important component of urban transportation systems, and their special equipment such as elevators and escalators have characteristics such as high working pressure, high frequency of use, and complex load changes. Once an accident occurs, it will have immeasurable impacts on public life safety and social stability. Building a smart large-scale transportation hub special equipment management system is the cornerstone of “smart city” construction, reducing equipment failure and accident rates, improving operational efficiency and service quality, as well as reducing operating costs and improving the economic benefits of enterprises. This article discusses the risk management of special equipment in transportation hubs from several aspects, including quality control of equipment maintenance and upkeep, investigation and risk assessment of equipment hazards, training on equipment operation safety, improvement and inspection of safety management systems, and emergency response to accidents. A risk governance intelligent analysis model with five levels of description model, judgment model, prediction model, decision model, and value model has been proposed as an indicator to evaluate whether the process of intelligent analysis of special equipment risk governance is “intelligent”.
The field fingerprint method (FSM), a new online corrosion monitoring method, has a good application prospect. Of all the corrosion defects of pressure pipes, local small corrosion pits are the most commonly seen, and it is also the focus of FSM research. Based on the FSM method, this paper conducts experimental research on the common round and rectangular small corrosion pits of pressure pipes. The results show that the FSM method is sensitive to small volume defects, and the small corrosion pits with the minimum detectable depth of 0.5 mm can accurately reflect the defect growth process, this being of great significance to the safe operation of pipelines.
在党中央、国务院深化"放管服"优化营商环境工作安排下,我国行政许可制度改革的重心正从清理审批数量逐步向优化许可模式转变.本文概述特种设备行政许可和信用监管的起源、发展及现状,研究信用监管在特种设备生产和充装单位自我声明承诺换证中的重要作用,总结得出信用监管赋能特种设备行政许可的积极成效及信用监管的相关问题,提出特种设备安全监管改革的相关对策、建议.
本文通过一起叉车起升装置越程保护失效的检验案例,详细分析了叉车越程安全距离的确定技术参数,对案例中的设备和同款其他设备进行了仔细勘察比较和技术分析,确定了起升装置越程保护失效的原因,避免同类安全隐患再次出现.列举了常见的防越程装置的结构形式,最后对越程保护装置在叉车安全使用、维修保养、检验等方面提出了意见和建议,具有一定的实践参考意义.
