Multi-disciplinary simulation analysis method and system for operating characteristics of ship lubricating oil system

Abstract

The invention provides a multidisciplinary simulation analysis method and system for operation characteristics of a ship lubricating oil system, and belongs to the technical field of ship simulation, and the method comprises the steps: setting working parameters of the lubricating oil system, and setting interlocking control logic of the lubricating oil system; constructing an energy accumulator flow equation; the energy accumulator flow equation is constructed based on the relation between the instantaneous pressure and the instantaneous flow after the energy accumulator is started, and the relation is determined based on the fluid resistance characteristic of the lubricating oil system, the normal working pressure of the system and the normal working flow of the system; and the working parameters, the interlocking control logic and the energy accumulator flow equation are imported into simulation software, and a lubricating oil system simulation model is established. According to the method, the operating characteristics of the system are analyzed by setting the working parameters of the lubricating oil system, the interlocking control logic and the energy accumulator flow equation constructed based on the relationship between the instantaneous pressure and the flow and combining the simulation model, so that the accuracy of analyzing the influence of the pressure pulsation on the lubricating oil system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship simulation, and in particular to a multidisciplinary simulation analysis method and system for operation characteristics of a ship lubricating oil system. Background Art

[0002] In the ship power system, the main task of the lubricating oil system is to provide stable lubrication and cooling for the main steam turbine unit, steam turbine generator unit and other key equipment to ensure the safe operation of each component. The lubricating oil system supplies lubricating oil that meets the pressure and temperature requirements to the equipment through the main lubricating oil pump. However, due to the complex operating environment of the ship equipment, the lubricating oil pump may face power failure or other failures, resulting in a sudden drop in system pressure. The existing lubricating oil system generally adopts the interlocking start-up method of the standby lubricating oil pump to deal with the failure of the main pump to quickly restore the oil supply pressure. However, the start-up process of the standby pump will cause the instantaneous drop and rise of the system pressure, that is, pressure pulsation. Although this pressure pulsation has no obvious effect in the short term, as time goes by, frequent pressure pulsation will affect the equipment bearings and gears and other components in the lubricating oil system. In the prior art, the pressure pulsation generated during the start-up and stop-down of the pump is mainly analyzed through experience to evaluate the impact of pressure pulsation on the lubricating oil system, but the accuracy of this analysis is low.

[0003] Therefore, how to improve the accuracy of the analysis of the impact of pressure pulsation on the lubricating oil system has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a multidisciplinary simulation analysis method, system, electronic equipment and storage medium for the operation characteristics of a ship lubricating oil system, which are used to solve the defects in the prior art and improve the accuracy of the analysis of the influence of pressure pulsation on the lubricating oil system.

[0005] The present invention provides a multidisciplinary simulation analysis method for the operation characteristics of a ship lubricating oil system, comprising the following steps: setting the working parameters of the lubricating oil system, wherein the working parameters include the normal working pressure of the system and the normal working flow rate of the system; Setting an interlocking control logic of the lubricating oil system, wherein the interlocking control logic is used to interlock and start a standby lubricating oil pump when the main lubricating oil pump fails to work normally; Constructing an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system, and the normal working flow of the system; The working parameters, the interlocking control logic and the accumulator flow equation are introduced into simulation software to establish the lubricating oil system simulation model, and the lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

[0006] According to a multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system provided by the present invention, the accumulator flow equation is constructed by the following method: Based on the fluid resistance characteristics, the normal resistance loss of the lubricating oil system during normal operation and the instantaneous resistance loss after the accumulator is started are defined respectively; wherein the normal resistance loss is nonlinearly related to the normal operating flow of the system, and the instantaneous resistance loss is nonlinearly related to the instantaneous flow; Constructing a definition formula of instantaneous pressure, wherein the definition formula of instantaneous pressure is constructed based on the ratio of the instantaneous resistance loss to the normal resistance loss and the normal working pressure of the system; Constructing a definition formula of minimum instantaneous pressure; the definition formula of minimum instantaneous pressure is constructed based on the relationship between the instantaneous resistance loss and the instantaneous flow rate; The accumulator flow equation is established based on the definition of the minimum instantaneous pressure and the definition of Boyle's gas law.

[0007] According to a multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system provided by the present invention, the instantaneous resistance loss is expressed by the following formula: ; The normal resistance loss is expressed by the following formula: ; The definition of the instantaneous pressure is expressed by the following formula: ; The definition of the minimum instantaneous pressure is expressed by the following formula: ; The accumulator flow equation is expressed by the following formula: ; Wherein, p is the instantaneous resistance loss, is the normal resistance loss, P is the instantaneous pressure, is the normal working pressure of the system, q is the instantaneous flow rate, For the normal working flow of the system, is the first coefficient, is the second coefficient, and The value of is related to the fluid resistance characteristic, is the minimum instantaneous pressure, q(t) is the instantaneous flow rate at time t, V(t) is the instantaneous volume of the accumulator at time t, and C is a constant.

[0008] According to a multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system provided by the present invention, the interlocking control logic of the lubricating oil system is set, specifically including: When at most one lubricating oil pump is in operation and it is determined that the current pressure of the lubricating oil main is lower than the normal operating pressure of the system, the standby lubricating oil pump is started in an interlocked manner.

[0009] According to a multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system provided by the present invention, the operating parameters also include: operating end outlet pressure, system medium, operating temperature and cleanliness requirements.

[0010] The present invention also provides a multidisciplinary simulation analysis system for the operation characteristics of a ship lubricating oil system, comprising the following modules: a processing module, for setting the working parameters of the lubricating oil system, wherein the working parameters include the normal working pressure of the system and the normal working flow rate of the system; The processing module is further used to set the interlocking control logic of the lubricating oil system, wherein the interlocking control logic is used to interlock and start the backup lubricating oil pump when the main lubricating oil pump fails to work normally; The processing module is further used to construct an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system, and the normal working flow of the system; The simulation analysis module is used to import the working parameters, the interlocking control logic and the accumulator flow equation into the simulation software to establish the lubricating oil system simulation model, and the lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

[0011] According to a multidisciplinary simulation analysis system for operation characteristics of a ship lubricating oil system provided by the present invention, the processing module is further used to define the normal resistance loss of the lubricating oil system during normal operation and the instantaneous resistance loss after the accumulator is started, respectively, based on the fluid resistance characteristics; wherein the normal resistance loss is nonlinearly related to the normal operating flow of the system, and the instantaneous resistance loss is nonlinearly related to the instantaneous flow; The processing module is further used to construct a definition formula of instantaneous pressure, wherein the definition formula of instantaneous pressure is constructed based on the ratio of the instantaneous resistance loss to the normal resistance loss and the normal working pressure of the system; The processing module is further used to construct a definition formula of minimum instantaneous pressure; the definition formula of minimum instantaneous pressure is constructed based on the relationship between the instantaneous resistance loss and the instantaneous flow rate; The processing module is further used to establish the accumulator flow equation based on the definition of the minimum instantaneous pressure and the definition of Boyle's gas law.

[0012] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the multidisciplinary simulation analysis method for the operating characteristics of a ship lubricating oil system as described above is implemented.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the multidisciplinary simulation analysis methods for operating characteristics of a ship lubricating oil system as described above.

[0014] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the multidisciplinary simulation analysis methods for operating characteristics of a ship lubricating oil system as described above.

[0015] In summary, one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: By setting the working parameters of the lubricating oil system, including the normal working pressure of the system and the normal working flow of the system, the lubricating oil system can always meet the basic pressure and flow requirements during the actual operation, thereby ensuring the lubrication and cooling effect of the equipment and ensuring the stability of the system. The setting of the working parameters provides stable basic data for the subsequent interlocking control logic and emergency compensation calculation, which can play a role in timely response under fault conditions. By setting the interlocking control logic of the lubricating oil system, when the main lubricating oil pump cannot work normally due to faults or other reasons, the interlocking control logic can automatically start the backup lubricating oil pump, thereby avoiding the sudden drop in system pressure when the lubricating oil pump is switched, and ensuring the continuous oil supply and normal operation of the equipment. The interlocking control logic ensures the rapid response of the system in an emergency, so that the lubricating oil system has the ability of self-regulation and emergency oil supply, thereby improving the reliability of the system and the operating life of the equipment. By constructing the accumulator flow equation, the lubricating oil system can dynamically adjust the output of the accumulator according to the instantaneous pressure and flow changes during the pump switching. The equation is constructed based on the relationship between the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system and the normal working flow of the system, so as to provide an accurate pressure compensation solution for the system. The establishment of this flow equation enables the accumulator to compensate in time when the system pressure fluctuates, effectively alleviating the pressure instability during pump switching, thereby ensuring the smooth operation of the equipment during the switching process. By importing the working parameters, interlocking control logic and accumulator flow equation into the simulation software, a simulation model of the lubricating oil system is established, and the operating characteristics of the system can be simulated and analyzed without actually operating the equipment. The simulation model can dynamically simulate the operating effects of the lubricating oil system under different working conditions such as pump switching, pressure compensation and emergency oil supply, thereby improving the accuracy of the analysis of the impact of pressure pulsation on the lubricating oil system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is one of the flow charts of the multidisciplinary simulation analysis method of the ship lubricating oil system operating characteristics provided by the present invention.

[0018] Figure 2 This is the second flow chart of the multidisciplinary simulation analysis method for the operating characteristics of a ship lubricating oil system provided by the present invention.

[0019] Figure 3 It is a structural schematic diagram of the multidisciplinary simulation analysis system for the operation characteristics of a ship lubricating oil system provided by the present invention.

[0020] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that, in the description of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. The orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" means at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] Combine the following Figure 1-Figure 4 The invention describes the multidisciplinary simulation analysis method, system, electronic equipment and storage medium for the operation characteristics of a ship lubricating oil system.

[0025] Figure 1 This is one of the flow charts of the multidisciplinary simulation analysis method for the operation characteristics of the ship lubricating oil system provided by the present invention, such as Figure 1 As shown, including but not limited to the following steps: Step 101: Setting the working parameters of the lubricating oil system, the working parameters including the normal working pressure of the system and the normal working flow of the system.

[0026] In a possible implementation, the working parameters also include: working end outlet pressure, system medium, working temperature and cleanliness requirements.

[0027] In step 101, the working parameters of the lubricating oil system are set to ensure that the lubricating oil system can always meet the requirements of equipment cooling, lubrication and safe operation under various working conditions. During the operation of the lubricating oil system, it is necessary to provide stable pressure and flow to ensure that the lubricating oil can effectively cover the main steam turbine unit, generator unit and other key parts, and provide necessary cooling and lubrication protection for these equipment in a short time. To this end, setting the working parameters of the lubricating oil system is not only the basis for the design of the entire system, but also an important basis for the subsequent interlocking control logic and emergency compensation capacity calculation.

[0028] Specifically, the working parameters of the lubricating oil system include the normal working pressure and normal working flow of the system. These parameters reflect the basic operating state of the system under stable conditions and are the core indicators of system design. The normal working pressure represents the minimum oil pressure that the lubricating oil system needs to reach to ensure that the lubricating oil can be delivered to each device at a specified pressure, while the normal working flow specifies the amount of oil required by the system under normal operating conditions to ensure the cooling and lubrication needs of each component. In actual application scenarios, the working parameters can further include the terminal outlet pressure, system medium characteristics (such as the viscosity and composition of the lubricating oil), operating temperature, and cleanliness requirements. These additional parameters take into account the particularity of the equipment operating environment and the characteristics of the lubricating oil. For example, the terminal outlet pressure is related to the minimum pressure that the oil flow still needs to reach at the end of the system to prevent the oil from flowing too slowly or stopping, resulting in lubrication failure; the type and viscosity parameters of the system medium affect the fluidity of the oil, thereby affecting the flow distribution; the cleanliness requirement ensures that there are no impurities in the oil to prevent equipment loss.

[0029] Step 102: Setting the interlocking control logic of the lubricating oil system, where the interlocking control logic is used to interlock and start the backup lubricating oil pump when the main lubricating oil pump fails to work normally.

[0030] In step 102, the interlocking control logic of the lubricating oil system is set to ensure that the lubricating oil system can automatically switch to the backup lubricating oil pump in time when special circumstances such as failure of the main lubricating oil pump or power failure occur, thereby ensuring the continuous oil supply of the system. Various equipment in the lubricating oil system, including the main steam turbine unit, generator unit and other key components, rely on lubricating oil for lubrication and cooling. Once the lubricating oil pump stops running, the system oil pressure will drop rapidly, which may cause an interruption in the oil supply and affect the normal operation of the equipment. Therefore, setting the interlocking control logic to automatically start the backup pump can effectively reduce the risk of oil pressure fluctuations to system stability and ensure that the lubricating oil system can continue to provide the necessary lubrication and protection for the equipment in an emergency.

[0031] In a possible implementation, step 102 specifically includes the following steps: When at most one lubricating oil pump is in operation and it is determined that the current pressure of the lubricating oil main is lower than the normal operating pressure of the system, the standby lubricating oil pump is started in an interlocked manner.

[0032] Specifically, during the operation of the lubricating oil system, when at most one lubricating oil pump is in operation and the current pressure of the lubricating oil main is lower than the normal working pressure of the system, the design of interlocking the start of the standby lubricating oil pump is intended to ensure that the system can maintain continuous and stable lubrication oil supply in unexpected situations to avoid equipment damage or performance degradation caused by too low pressure. The lubricating oil system is usually in a one-in-one-standby mode under normal conditions, that is, one lubricating oil pump is working and the other is used as a standby pump for emergency use. However, if the working lubricating oil pump fails, such as stopping due to power outage or mechanical failure, the system oil pressure will drop rapidly and cannot meet the system's pressure and flow requirements. At this time, if the standby lubricating oil pump cannot be started in time to restore the system oil pressure, it may cause the main steam turbine unit, generator unit and other key equipment to lose lubrication protection, thereby causing equipment wear or temperature increase, affecting the reliability and safety of the overall system. Therefore, the design of interlocking the start of the standby lubricating oil pump can effectively deal with such emergencies and ensure the stable operation of the system.

[0033] In specific operation, the pump valve controller of the engine room monitoring station will continuously monitor the current pressure status of the lubricating oil main. When at most one lubricating oil pump is in operation, and the other lubricating oil pumps stop running due to power failure or mechanical failure, and it is determined that the current pressure of the lubricating oil main is lower than the normal working pressure of the system, the pump valve controller will immediately send a start signal to the standby lubricating oil pump, and start the standby pump in a chain, so that it can quickly take over the oil supply function of the main lubricating oil pump. During the response process of the standby pump, the control system maintains real-time feedback on the pressure of the lubricating oil main through the chain logic, ensuring that the oil supply effect of the standby pump meets the normal working pressure requirements and avoiding pressure fluctuations that affect the normal operation of various equipment in the system.

[0034] Step 103: construct an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system, and the normal working flow of the system.

[0035] In step 103, the accumulator flow equation is constructed to ensure that the lubricating oil system can quickly provide stable pressure and flow compensation through the accumulator when the main lubricating oil pump fails or loses power, causing oil pressure fluctuations. Pressure fluctuations in the lubricating oil system will directly affect the lubrication effect of the equipment. When the main lubricating oil pump stops working, the oil pressure will drop rapidly. At this time, although the start-up of the backup lubricating oil pump can restore the oil supply of the system in a short time, the system oil pressure will experience pressure drop and recovery fluctuations during the switching period, which may have an adverse effect on the normal operation of various equipment in the system. As an emergency compensation device of the system, the accumulator can provide short-term pressure and flow support in this process to alleviate the impact of pressure drop. Therefore, constructing an accumulator flow equation based on the fluid resistance characteristics of the lubricating oil system can provide theoretical support for the design, so that the accumulator can respond quickly when the pressure fluctuates, thereby optimizing the emergency oil supply performance of the system.

[0036] In one possible implementation, refer to Figure 2 , Figure 2 FIG. 2 is a flow chart of the multidisciplinary simulation analysis method for the operation characteristics of the ship lubricating oil system provided by the present invention. Figure 2 As shown, the method for constructing the accumulator flow equation specifically includes steps 201-204: Step 201: Based on the fluid resistance characteristics, define the normal resistance loss of the lubricating oil system during normal operation and the instantaneous resistance loss after the accumulator is started; wherein the normal resistance loss is nonlinearly related to the normal operating flow of the system, and the instantaneous resistance loss is nonlinearly related to the instantaneous flow.

[0037] In a possible implementation, the instantaneous resistance loss is expressed by the following formula: ; Normal drag loss is expressed by the following formula: ; Where p is the instantaneous resistance loss, is the normal resistance loss, P is the instantaneous pressure, is the normal working pressure of the system, q is the instantaneous flow rate, For the normal working flow of the system, is the first coefficient, is the second coefficient, and The value of is related to the fluid resistance characteristics.

[0038] In step 201, in order to accurately describe the fluid resistance characteristics of the lubricating oil system and construct an expression for the instantaneous resistance loss, we need to analyze in detail the resistance loss of the lubricating oil system under different working conditions. The fluid resistance characteristics of the lubricating oil system are mainly reflected in three aspects: along-the-line resistance loss, local resistance loss, and porous medium resistance loss. The precise definition of these resistance losses can provide reliable theoretical support for the subsequent accumulator flow equation, ensuring that the lubricating oil system can respond quickly when the main lubricating oil pump is switched and provide stable pressure compensation.

[0039] First, the resistance loss along the way It refers to the continuous resistance generated when the oil flows along the pipeline of the lubricating oil system. The resistance loss can be expressed by the formula Calculate, where λ is the resistance coefficient along the way, l is the length of the pipe section, d is the pipe diameter, ρ is the fluid density, and ν is the fluid flow rate. This resistance loss is proportional to the length of the pipe and the square of the fluid flow rate. The higher the flow rate, the greater the resistance loss along the way.

[0040] Secondly, local resistance loss It reflects the resistance generated when the oil passes through the local structure in the pipeline (such as elbows, oil coolers, oil filters, etc.). The local resistance loss can be calculated by the formula Calculate, where ξ is the local resistance coefficient, which is still proportional to the square of the fluid velocity. Local resistance loss characterizes the influence of various local structures inside the system on the oil flow, and is an important factor affecting the pressure fluctuation of the system when the flow changes.

[0041] Finally, the porous media resistance loss It indicates the resistance generated when oil passes through a porous structure. The calculation formula for this resistance loss is: , where K is the porous medium resistance coefficient, Q is the flow rate, A is the flow area, and μ is the dynamic viscosity. Different from the first two items, the porous medium resistance loss is closely related to the linear relationship between the flow rate and is an important influencing factor under low flow rate conditions.

[0042] After combining the resistance loss along the way, local resistance loss and porous medium resistance loss, the expression of instantaneous resistance loss p is: .

[0043] In this expression, both the along-the-way and local resistance loss terms are proportional to the square of the flow velocity, while the linear relationship between the resistance loss of porous media and the flow rate is closely related. Since the square of the flow velocity is equivalent to the square of the flow rate, the expression of the instantaneous resistance loss is simplified to: . Similarly, the simplified expression of normal resistance loss is obtained: Through these simplified expressions, both the instantaneous resistance loss and the normal resistance loss can be expressed by the square term and the first-order term of the flow rate, so that the flow change of the lubricating oil system when the main lubricating oil pump fails or the standby pump is switched can be accurately described. The effect of this is that the relationship between the flow rate and resistance change of the system under different working conditions can be clearly presented, which is convenient for the subsequent construction of the accumulator flow equation.

[0044] Step 202: construct a definition formula of instantaneous pressure, where the definition formula of instantaneous pressure is constructed based on the ratio of instantaneous resistance loss to normal resistance loss and the normal working pressure of the system.

[0045] In a possible implementation, the definition of instantaneous pressure is expressed by the following formula: ; Where p is the instantaneous resistance loss, is the normal resistance loss, P is the instantaneous pressure, is the normal working pressure of the system, q is the instantaneous flow rate, For the normal working flow of the system, is the first coefficient, is the second coefficient, and The value of is related to the fluid resistance characteristics.

[0046] In step 202, the definition of instantaneous pressure is constructed to accurately describe the system pressure change in the instantaneous state when the main lubricating oil pump fails or switches to the backup lubricating oil pump in the lubricating oil system. Since the switching of the lubricating oil pump will cause flow fluctuations, the instantaneous pressure of the system will also fluctuate. In order to ensure the pressure stability of the system during the transition period and provide a reference for the subsequent accumulator compensation, it is necessary to establish a definition of instantaneous pressure so as to accurately calculate the pressure state under different instantaneous flow rates and maintain effective control of the system.

[0047] Specifically, the definition of instantaneous pressure is based on the ratio of instantaneous resistance loss to normal resistance loss and the normal working pressure of the system. The numerator is the instantaneous resistance loss, and the denominator is the normal resistance loss. The ratio of the two reflects the change ratio of resistance in the instantaneous state relative to the normal state.

[0048] It should be noted that after obtaining the definition of instantaneous pressure, by further analyzing the instantaneous flow q and the normal working flow of the system The ratio relationship of can be used to deduce the reasonable range of instantaneous pressure. Because in actual operation, the instantaneous flow rate is usually less than the normal working flow rate of the system, that is, , this condition can be used to constrain the range of instantaneous pressure.

[0049] Based on this condition, the upper and lower limit expressions of instantaneous pressure are derived: , where the instantaneous pressure P changes within this range. Since the oil-consuming equipment in the lubricating oil system cannot provide clear flow resistance characteristics during fault switching, the role of the accumulator is to provide dynamic compensation according to the change of instantaneous pressure. Therefore, the conditions for judging whether the accumulator should be activated can be realized by the limited range of instantaneous pressure and flow to ensure that the output of the accumulator is triggered under the conditions of meeting specific pressure and flow.

[0050] Specifically, the starting condition of the accumulator can be defined as: when the instantaneous pressure P satisfies , and the instantaneous flow q satisfies When the pressure and flow rate reach the critical range, the accumulator should be activated to provide the necessary pressure compensation. Through this condition definition, the accumulator can be quickly triggered to work when the pressure and flow rate reach the critical range, ensuring timely replenishment of system pressure.

[0051] Step 203: construct a definition formula of minimum instantaneous pressure; the definition formula of minimum instantaneous pressure is constructed based on the relationship between instantaneous resistance loss and instantaneous flow rate.

[0052] In a possible implementation, the definition of the minimum instantaneous pressure is expressed by the following formula: ; Where q is the instantaneous flow rate, is the first coefficient, The value of is related to the fluid resistance characteristics, is the minimum instantaneous pressure.

[0053] In step 203, the definition of the minimum instantaneous pressure is constructed to ensure that the pressure in the system will not fall below a certain safety threshold when the lubricating oil system fails or switches to the backup lubricating oil pump, thereby preventing insufficient lubrication or excessive temperature of the equipment caused by too low oil pressure. Since the lubricating oil system will experience instantaneous pressure fluctuations in the transition state, in order to ensure the safe operation of the system, a minimum instantaneous pressure value needs to be set so that the emergency compensation mechanism of the accumulator is triggered when the pressure drops to this value, thereby balancing the system pressure and ensuring the stability of the equipment under critical conditions.

[0054] Specifically, the definition of the minimum instantaneous pressure is based on the relationship between the instantaneous resistance loss and the system flow. Since the instantaneous resistance loss expression is , and the instantaneous flow rate is usually less than the normal working flow rate when the lubricating oil pump fails or switches, so the lower limit of the instantaneous pressure can be defined by a simplified form of the instantaneous resistance loss. To ensure system safety, we set the minimum value of the instantaneous pressure to , that is, when the system flow is low, the lower pressure limit of the system is dominated by the resistance loss along the way.

[0055] Step 204: Based on the definition of the minimum instantaneous pressure and the definition of Boyle's gas law, establish an accumulator flow equation.

[0056] Boyle's gas law is defined by the following formula: ; The accumulator flow equation is expressed by the following formula: ; in, is the first coefficient, n is the polynomial index of the gas, q(t) is the instantaneous flow rate at time t, V(t) is the instantaneous volume of the accumulator at time t, and C is a constant.

[0057] In step 204, based on the definition of the minimum instantaneous pressure and Boyle's gas law, the accumulator flow equation is established to provide stable pressure and flow compensation through the accumulator when the lubricating oil system fails or the lubricating oil pump is switched, thereby ensuring the smooth operation of the system in the transition state. The lubricating oil system is provided with stable pressure and flow by the main lubricating oil pump under normal conditions, but when the main pump fails, the oil pressure in the system will drop rapidly. In this case, the accumulator can maintain the stability of the system by compensating the pressure. However, in order to accurately control the output of the accumulator and ensure that it provides compensation at the right time, an accurate flow equation needs to be established.

[0058] In the lubricating oil system, it is assumed that there is no heat exchange between the gas in the accumulator and the external environment during the gas state change process, so it is an adiabatic process, and n=1.4 is taken. On this basis, the flow equation of the accumulator can be constructed in the following way: Set the initial pressure and volume conditions , and relates instantaneous flow and volume to system pressure changes, allowing the accumulator to provide immediate compensation when pressure falls below the minimum instantaneous pressure.

[0059] The flow equation of the accumulator is finally expressed as Through this equation, the accumulator can be accurately controlled under different flow and pressure conditions to ensure that the system pressure is close to or lower than the minimum instantaneous pressure P min When the accumulator is able to respond immediately and provide corresponding flow and pressure compensation.

[0060] Step 104: Import the working parameters, interlocking control logic and accumulator flow equation into the simulation software to establish a lubricating oil system simulation model, which is used to simulate and analyze the operating characteristics of the lubricating oil system.

[0061] In step 104, the working parameters, interlocking control logic and accumulator flow equation are imported into the simulation software. The purpose of establishing the lubricating oil system simulation model is to verify the operating characteristics of the lubricating oil system when the main lubricating oil pump fails or switches to the backup lubricating oil pump through computer simulation without actual experiments, so as to ensure the pressure and flow stability of the system in emergency situations. The real-time operation of the lubricating oil system involves many complex factors, such as pressure fluctuations, flow changes and instantaneous resistance losses. Through the simulation model, these factors can be comprehensively considered to accurately evaluate the dynamic response behavior of the system and provide data support for system optimization and fault prevention.

[0062] Specifically, the previously set working parameters, including normal working pressure, normal working flow, system medium characteristics, etc., are input into the simulation software as the basic parameters of the system. In addition, the introduction of interlocking control logic enables the model to automatically identify the failure conditions of the main lubricating oil pump during the simulation process, and start the backup lubricating oil pump in time according to the set conditions, so as to achieve a high degree of simulation of the actual operation scene. The interlocking control logic in the simulation model can accurately reproduce the logical judgment process of emergency oil supply. For example, when the lubricating oil main pressure is lower than the normal working pressure and only one lubricating oil pump is running, the model will simulate the pump valve controller to send a signal to start the backup pump and realize automatic switching to ensure the authenticity of the simulation results.

[0063] At the same time, the introduction of the accumulator flow equation ensures that the compensation effect of the accumulator in pressure fluctuations can be accurately simulated in the simulation. By inputting the model, the system can calculate the accumulator response under different instantaneous flow and pressure conditions in real time, enabling the model to simulate the dynamic compensation effect of the accumulator on pressure and flow during the switching of the lubricating oil pump, thereby avoiding lubrication interruption or equipment wear due to pressure drop or insufficient flow.

[0064] Reference Figure 3 , Figure 3 It is a structural schematic diagram of a multidisciplinary simulation analysis system for operating characteristics of a ship lubricating oil system provided by the present invention, the system comprising: a processing module for setting operating parameters of the lubricating oil system, the operating parameters including a normal operating pressure of the system and a normal operating flow rate of the system; The processing module is also used to set the interlocking control logic of the lubricating oil system, and the interlocking control logic is used to interlock and start the standby lubricating oil pump when the main lubricating oil pump fails to work normally; The processing module is also used to construct an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system, and the normal working flow of the system; The simulation analysis module is used to import the working parameters, interlocking control logic and accumulator flow equation into the simulation software to establish a lubricating oil system simulation model. The lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

[0065] In a possible implementation, the processing module is further used to define the normal resistance loss of the lubricating oil system during normal operation and the instantaneous resistance loss after the accumulator is started, respectively, based on the fluid resistance characteristics; wherein the normal resistance loss is nonlinearly related to the normal operating flow of the system, and the instantaneous resistance loss is nonlinearly related to the instantaneous flow; The processing module is further used to construct a definition formula of instantaneous pressure, where the definition formula of instantaneous pressure is constructed based on the ratio of instantaneous resistance loss to normal resistance loss and the normal working pressure of the system; The processing module is also used to construct a definition formula of the minimum instantaneous pressure; the definition formula of the minimum instantaneous pressure is constructed based on the relationship between the instantaneous resistance loss and the instantaneous flow rate; The processing module is further used to establish an accumulator flow equation based on a definition of the minimum instantaneous pressure and a definition of Boyle's gas law.

[0066] In a possible implementation manner, the processing module is further configured to start a standby lubricating oil pump in a chain manner when at most one lubricating oil pump is in operation and it is determined that the current pressure of the lubricating oil main is lower than the normal operating pressure of the system.

[0067] It should be noted that the multidisciplinary simulation and analysis system for the operation characteristics of the ship lubricating oil system provided by the present invention can execute the multidisciplinary simulation and analysis method for the operation characteristics of the ship lubricating oil system of any of the above-mentioned embodiments during specific operation, which will not be elaborated in this embodiment.

[0068] Figure 4 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 4As shown, the electronic device may include: a processor 410 (processor), a communication interface 420 (CommunicationsInterface), a memory 430 (memory) and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the multidisciplinary simulation analysis method of the operation characteristics of the ship lubricating oil system, the method comprising: setting the working parameters of the lubricating oil system, the working parameters including the normal working pressure of the system and the normal working flow of the system; setting the interlocking control logic of the lubricating oil system, the interlocking control logic is used to interlock and start the backup lubricating oil pump when the main lubricating oil pump cannot work normally; constructing the accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system and the normal working flow of the system; the working parameters, the interlocking control logic and the accumulator flow equation are imported into the simulation software to establish a simulation model of the lubricating oil system, and the simulation model of the lubricating oil system is used to simulate and analyze the operation characteristics of the lubricating oil system.

[0069] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0070] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by the computer, the computer can execute the multidisciplinary simulation analysis method of the ship lubricating oil system operating characteristics provided by the above-mentioned embodiments, and the method includes: setting the working parameters of the lubricating oil system, the working parameters include the normal working pressure of the system and the normal working flow of the system; setting the interlocking control logic of the lubricating oil system, and the interlocking control logic is used to interlock and start the backup lubricating oil pump when the main lubricating oil pump cannot work normally; constructing an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system and the normal working flow of the system; the working parameters, the interlocking control logic and the accumulator flow equation are imported into the simulation software to establish a lubricating oil system simulation model, and the lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

[0071] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by the processor 410, is implemented to execute the multidisciplinary simulation analysis method for the operating characteristics of the ship lubricating oil system provided in the above-mentioned embodiments, the method comprising: setting the working parameters of the lubricating oil system, the working parameters including the normal working pressure of the system and the normal working flow of the system; setting the interlocking control logic of the lubricating oil system, the interlocking control logic being used to interlock and start the backup lubricating oil pump when the main lubricating oil pump fails to work normally; constructing an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system and the normal working flow of the system; the working parameters, the interlocking control logic and the accumulator flow equation are imported into the simulation software to establish a lubricating oil system simulation model, and the lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

[0072] The system embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0073] Through the description of the above implementation modes, those skilled in the art can clearly understand that each implementation mode can be implemented by means of software plus a necessary general hardware platform, or of course by hardware. Based on such an understanding, the above technical solution can essentially or in other words be embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multidisciplinary simulation analysis method for the operating characteristics of a ship lubricating oil system, characterized in that: include: Setting the working parameters of the lubricating oil system, wherein the working parameters include the normal working pressure of the system and the normal working flow of the system; Setting an interlocking control logic of the lubricating oil system, wherein the interlocking control logic is used to interlock and start a standby lubricating oil pump when the main lubricating oil pump fails to work normally; Construct the accumulator flow equation; The accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system, and the normal working flow of the system; The working parameters, the interlocking control logic and the accumulator flow equation are introduced into simulation software to establish the lubricating oil system simulation model, and the lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

2. The multidisciplinary simulation analysis method for ship lubricating oil system operating characteristics according to claim 1 is characterized in that: The accumulator flow equation is constructed by the following method: Based on the fluid resistance characteristics, the normal resistance loss of the lubricating oil system during normal operation and the instantaneous resistance loss after the accumulator is started are defined respectively; wherein the normal resistance loss is nonlinearly related to the normal operating flow of the system, and the instantaneous resistance loss is nonlinearly related to the instantaneous flow; Constructing a definition formula of instantaneous pressure, wherein the definition formula of instantaneous pressure is constructed based on the ratio of the instantaneous resistance loss to the normal resistance loss and the normal working pressure of the system; Constructing a definition formula of minimum instantaneous pressure; the definition formula of minimum instantaneous pressure is constructed based on the relationship between the instantaneous resistance loss and the instantaneous flow rate; The accumulator flow equation is established based on the definition of the minimum instantaneous pressure and the definition of Boyle's gas law.

3. The multidisciplinary simulation analysis method for ship lubricating oil system operating characteristics according to claim 2 is characterized in that: The instantaneous resistance loss is expressed by the following formula: ； The normal resistance loss is expressed by the following formula: ； The definition of the instantaneous pressure is expressed by the following formula: ； The definition of the minimum instantaneous pressure is expressed by the following formula: ； The accumulator flow equation is expressed by the following formula: ； Wherein, p is the instantaneous resistance loss, is the normal resistance loss, P is the instantaneous pressure, is the normal working pressure of the system, q is the instantaneous flow rate, For the normal working flow of the system, is the first coefficient, is the second coefficient, and The value of is related to the fluid resistance characteristic, is the minimum instantaneous pressure, q(t) is the instantaneous flow rate at time t, V(t) is the instantaneous volume of the accumulator at time t, and C is a constant.

4. The multidisciplinary simulation analysis method for ship lubricating oil system operating characteristics according to claim 1 is characterized in that: The interlocking control logic of setting the lubricating oil system specifically includes: When at most one lubricating oil pump is in operation and it is determined that the current pressure of the lubricating oil main is lower than the normal operating pressure of the system, the standby lubricating oil pump is started in an interlocked manner.

5. The multidisciplinary simulation analysis method for ship lubricating oil system operating characteristics according to claim 1 is characterized in that: The working parameters also include: working end outlet pressure, system medium, working temperature and cleanliness requirements.

6. A multidisciplinary simulation analysis system for the operation characteristics of a ship lubricating oil system, characterized in that: include: A processing module, used for setting working parameters of the lubricating oil system, wherein the working parameters include a normal working pressure of the system and a normal working flow rate of the system; The processing module is further used to set the interlocking control logic of the lubricating oil system, wherein the interlocking control logic is used to interlock and start the backup lubricating oil pump when the main lubricating oil pump fails to work normally; The processing module is further used to construct an accumulator flow equation; the accumulator flow equation is constructed based on the relationship between the instantaneous pressure and the instantaneous flow after the accumulator is started, and the relationship is determined based on the fluid resistance characteristics of the lubricating oil system, the normal working pressure of the system, and the normal working flow of the system; The simulation analysis module is used to import the working parameters, the interlocking control logic and the accumulator flow equation into the simulation software to establish the lubricating oil system simulation model, and the lubricating oil system simulation model is used to simulate and analyze the operating characteristics of the lubricating oil system.

7. The multidisciplinary simulation analysis system for ship lubricating oil system operation characteristics according to claim 6 is characterized in that: The processing module is further used to define the normal resistance loss of the lubricating oil system when it is working normally and the instantaneous resistance loss after the accumulator is started, respectively, based on the fluid resistance characteristics; wherein the normal resistance loss is nonlinearly related to the normal working flow of the system, and the instantaneous resistance loss is nonlinearly related to the instantaneous flow; The processing module is further used to construct a definition formula of instantaneous pressure, wherein the definition formula of instantaneous pressure is constructed based on the ratio of the instantaneous resistance loss to the normal resistance loss and the normal working pressure of the system; The processing module is further used to construct a definition formula of minimum instantaneous pressure; the definition formula of minimum instantaneous pressure is constructed based on the relationship between the instantaneous resistance loss and the instantaneous flow rate; The processing module is further used to establish the accumulator flow equation based on the definition of the minimum instantaneous pressure and the definition of Boyle's gas law.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system as described in any one of claims 1 to 5 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system as claimed in any one of claims 1 to 5 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the multidisciplinary simulation analysis method for operating characteristics of a ship lubricating oil system as claimed in any one of claims 1 to 5 is implemented.

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